What are Symptoms of Bad Valve Seals?

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Valves regulate the amount of fuel and air mixture allowed in the cylinders for combustion. While the valves have guides or sleeves to keep combustion gases from passing through them, the seals on the top of the valves keep oil in the valve cover from being sucked down into the engine. Seals, typically made of high-strength rubber, fit over the top of the valve stem inside a small collar. When valve seals begin to wear or fail they produce some obvious and unique symptoms.

 

Cold Engine

One of the most noticeable signs of worn or cracked valve stem seals will be just after a cold engine start. If the vehicle has been sitting for any length of time or even overnight, the top of the head inside the valve cover will be coated with residual oil that was pumped up earlier during running operation. The rubber valve seal has also cooled during nonoperation, which causes it to contract and leave a small gap. When the engine first starts up, residual oil gets sucked down through the bad seal and into the combustion chamber. A large cloud of blue-white smoke will be seen exiting the tailpipe just after start-up.

 

Idle and Stop and Go Driving

Bad valve seals will show themselves during prolonged idling at stop signs or stop lights in congested city conditions. When the vehicle sits at idle for prolonged periods, high levels of vacuum at the intake manifold result because the throttle valve remains closed. The high vacuum attracts oil in the heads to congregate around the valve stems. Upon acceleration, the oil gets sucked past the eroding seal and down through the valve guide, where it burns in the exhaust. Huge clouds of blue-white smoke exit the tailpipe after each acceleration from a stop. The burning smoke will disappear during cruising or highway speed.

 

Off-Throttle Braking

Evidence of valve seals being compromised will show up during off-throttle braking, especially when descending a steep downgrade where the accelerator pedal remains static. With the creation of high intake manifold vacuum, coupled with the downward slant of the engine, oil collects toward the front of the valve cover over the head. Upon pushing the accelerator after a long coast, burned oil will exit the tailpipe in copious amounts. The engine will continue to burn the oil longer in this case, but it will still be a temporary condition until finally the smoking stops under normal cruise.

 

Oil Consumption

Bad valve seals will cause excessive oil consumption. In an otherwise normal engine with good compression, rings and valve guides, bad seals will cause a loss of oil that can be detected on the oil dipstick. By keeping an accurate record of oil level on the dipstick, a noticeable oil reduction due to the oil being burned along with the fuel will be discovered. Bad seals will be confirmed if no oil leaks can be found on the engine to account for the loss.

 

Excessive Smoke

If the valve seals have deteriorated enough, the blue-white exhaust smoke will last longer after start-up and acceleration. Yet the smoke will eventually disappear after long engine operation or during periods of hot weather. Bad valve seals nearly always show an intermittent problem of oil burning, whereas worn piston rings and valve guides will smoke during all times of engine operation and never disappear.

 

Get more information about valve seals, please do not miss the website of AOK Valve Stem Seals Ltd... The company can provide a variety of valve seals, o rings, and bonded seals for you. Try to check out their product pages and feel free to send inquiry to AOK for more details.

 

 

Article Source: It Still Runs

EDM 101: What is EDM and Where to Find CNC Drilling EDM Machines Manufacturer?

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What is EDM?

 

EDM stands for electrical discharge machining, the applications best suited for this metal removal process are those characterized by extremely exacting tolerances and situations that would be extremely difficult or impossible to handle with any other method of machining.

 

Growth of EDM

 

EDM has rapidly earned its place alongside milling and grinding equipment as a proactive, mainstream technology. EDM is best known for its ability to machine complex shapes in very hard metals. The most common use of EDM is machining dies, tools and molds made of hardened steel, tungsten carbide, high-speed steel and other workpiece materials that are difficult to machine by “traditional” methods.

 

The process has also solved a number of problems related to the machining of “exotic” materials such as Hastelloy, Nitralloy, Waspaloy and Nimonic, which are used on a large scale in the aeronautical and aerospace industries.

 

With the reduction in electrode wear and increased sophistication of EDM controls in rams, new EDM processes use simple-shaped electrodes to 3D mill complex shapes. EDM also is being used for polishing small, intricate surfaces.

 

Since EDM does not involve workpiece/tool forces like a mill or grinder, it is possible to EDM shapes that would break conventional cutting tools or be broken by them.

 

Different Types of EDM

 

  1. RAM EDM

RAM EDM, also known as plunge EDM or standard EDM, is the oldest form of EDM machining. It generally consists of an electrode usually made out of graphite that is plunged into a workpiece in order to create a blind-shaped cavity. It can also be used to generate through holes and geometry but these are not the primary uses of the process.

 

  1. Drill EDM

Drill EDM uses rotating concentric electrodes to drill through a workpiece and basically performs the same functions as a drill press, except that the material hardness is not a factor and the accuracy of the finished hole is far superior than what any drill press can produce. It is best used to drill start holes for the wire EDM in already hardened material as well as accurate very small holes for industries like aerospace and medical equipment.

 

  1. Wire EDM

Wire EDM uses a traveling wire electrode (usually .010” diameter or smaller) that goes through the workpiece. The wire, in this case, is controlled by computer following the assigned geometry for the part to be produced.

 

EDM for Tooling Applications

 

When a part requires special / unique conventional cutting tools, electrodes are easy to machine, unlike carbide. Equally important, the wire used by a wire EDM is available as a standard, off-the-shelf component. EDM is a low cost tooling option when you need short run stamping (less than 5,000 pieces) and low volume broaching. With EDM, there’s no need to make a die set. That’s why EDM is used to make sewing machine components and prototypes. Instead of using expensive broaches, EDM is a very attractive form of low-cost tooling. This is a reason companies use EDM to produce splines and gear teeth along with all their metal stamping & mold making needs.

 

Where to Find The Reliable EDM Machines Manufacturer?

 

About this question, I recommend that you can try to visit the website of OCEAN Technologies Co., Ltd.. This company is specializing in kinds of high quality EDM machines. If you need more information about CNC drilling EDM machines, please do not hesitate to check out OCEAN product pages and feel free to send inquiry to them.

 

Article Source: Mercatech, Inc.

Carbon Braid Manufacturing Expert – Taiwan Electric Insulator

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Do You Know What Carbon Braid Is?

 

Carbon braid, sometimes called “graphite fiber”. Carbon fiber is one of the strongest and stiffest reinforcements available.

 

Carbon braid is most commonly used in the fabrication process of custom definitive sockets for upper and lower limb prosthetics. Carbon braid allows the patient to have a lightweight yet rigid socket frame. When a technician fabricates a carbon frame he employs a hand lamination process of manually saturating the carbon braid with a hardening resin.

 

Carbon braid is commonly available in weights of 12K standard, 6K lightweight, and 3K ultra lightweight.

 

?Tech Tip – The rigidity of a carbon socket can be greatly increased or decreased by the number of layers used during the lamination process.

 

Where to Find The Carbon Braid Manufacturer?

 

That’s a good question! Here, I recommend an experienced carbon braid manufacturer to you – it is Taiwan Electric Insulator Co. Ltd.

 

Taiwan Electric Insulator is a world leading manufacturer of composite fabrics and composite materials, with the technology, knowledge and ability to produce the highest grade composite material to specific customers’ needs and requirements. If you need more information about carbon braid or other composite materials, please do not hesitate to send inquiry or contact with them immediately.

 

Article Source: Curbell Plastics

5 Reasons to Use a PU Caster Wheel in a Heavy Duty Industrial Wheel and Caster Application

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PU casters are a popular wheel tread for use on industrial wheels, whether it is in a caster application or drive wheel applications. There are many great reasons to choose PU casters for an industrial wheel or caster application. This article will discuss some of the reasons why PU casters are a popular choice.

 

  1. Noise Reduction

 

PU casters are a popular choice in industrial applications because of their quietness in operation when compared to harder wheels such as steel or cast iron. The polyurethane acts as a shock absorber and helps to cushion the ride and absorb bumps from uneven terrain. The noise levels can be reduced dramatically when using polyurethane instead of steel or cast iron wheels, which can help protect your employees hearing.

 

  1. Load Bearing Capability

 

PU casters are also often utilized for their load bearing capacity when compared to rubber. Polyurethane can provide a greater load bearing capacity while still providing the benefits of a rubber tread, such as noise reduction, shock absorption, and floor protection.

 

  1. Coefficient of Friction

 

Another benefit to PU casters in industrial applications is the coefficient of friction of the material. Polyurethane tends to be a grippy material and can help keep towed carts right-side up, where sliding can be a problem for harder wheel materials. It also provides good traction to drive wheels and helps to reduce the amount of load on the wheel to achieve the desired driving force.

 

  1. Floor Protection

 

PU casters are also chosen in applications where floor protection is critical. The polyurethane will deflect and create a much larger footprint than harder wheel materials, such as nylon. This larger area helps reduce the stress concentration on floors and keep the floors in better shape for a longer period of time. So if your floors are expensive and critical to your operation, a PU caster may be the correct choice for your application.

 

  1. Resistance to Corrosion

 

There are many different types of polyurethanes that have varying levels of resistance to certain chemicals, solvents, or even water. In humid or wet environments, polyurethane can be chosen that will not break down or corrode in the presence of water. In other environments where chemical exposure is a problem, a different type of polyurethane can be used to prolong the life of the industrial wheel.

 

PU casters have many benefits in industrial wheel and caster applications, and the reasons above discuss some of the more popular ones. Polyurethanes can provide resistance to corrosion, floor protection, and noise reduction all while providing a material that can handle a lot of capacity. Switching to a PU caster could have a dramatic impact on the success of your operation.

 

If you have any interest in PU caster wheels, I recommend that you can visit the website of ENJOYING GO Co., Ltd.

 

ENJOY is a professional caster wheel manufacturer in Taiwan. They can provide best quality caster wheels for office chairs and home furniture. Do not hesitate to check out ENJOY’s website and feel free to send inquiry to let them know your requirements.

 

 

Article Source: https://www.casterconcepts.com/solutions/polyurethane-casters/polyurethane-tires-advantages/

Benefits of Having a Precision Lathe

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For complex parts and components, you will always need professional precision CNC machining services. However, for prototypes, simple parts, and short runs, there are also benefits of owning a high precision lathe. Although the machine is automated, it gets its instructions from a human who enters written code. Therefore, to own a machine, you also need an operator qualified to provide it with instructions.

 

CNC machine programming may not be rocket science, but it does require knowledge and skill. However, being in control is the greatest benefit of owning a machine. You have the opportunity to produce what you need whenever you need it. Whether creating a protocol or processing a large run, you have full control. Just remember that there is a financial investment in buying a CNC machine. With many different types of the CNC machine, you can always purchase the one that you would use most and then hire a manufacturer for the other work.

 

Types of CNC Machines

 

Following are the five types of machines most commonly used, although there are others. As you can see, each machine offers distinct benefits.

 

  • Router – A CNC router works by engraving plastic, wood, or metal. Following the entered code, a router can perform simple and detailed engraving tasks.
  • CNC Laser – One of the more advanced types of machine, the CNC laser is similar to a cutter with the exception that it cuts wood and metal. In some instances, this machine also cuts plastic. Regardless of the material, the finished product is perfect.
  • CNC Milling – Widely used, the CNC milling machine moves cutters as well as other tools for cutting metal pieces into specified shapes and sizes. Based on the number of axes that a milling machine has, it falls under several classifications.
  • CNC Lathe Machines – These machines are extremely accurate, but also precise, easy to operate, and capable of producing repeatable parts and components. With CNC lathe machines, you can make 3D molds and shapes out of wood, plastic, and metal.
  • CNC Plasma Cutters – While similar to a CNC router, a plasma cutter setup is not as challenging. With this machine, you can produce 2D molds and shapes out of metal.

 

Seeking Professional Assistance

 

There is nothing wrong with owning your own CNC machine and being in control of production. However, when you need outside help, you can try to send inquiry or contact with SHUN CHUAN Machinery. They are the professional and reliable manufacturer of CNC lathe machines. Get more information about precision lathe and other CNC machines, please do not hesitate to check out Shun Chuan website: www.sunmaster-cnc.com and contact them immediately.

 

Article Source: https://www.nexgenmachine.com/benefits-of-having-a-precision-cnc-machine/

Choosing Hydraulic Valves – New and Replacement

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Hydraulic valves that are recognized by CETOP standards are interchangeable within most types of hydraulic equipment, making it easy to find a supplier that can provide valves suitable for use in your hydraulic equipment.

 

Valves in hydraulic equipment control and regulate the flow of hydraulic fluid through a system, but as there are different requirements for fluid flow in certain applications it is important that the right valve is used for each purpose.

 

Types of Hydraulic Valves Are Used For Each Right Purpose

 

Flow control valves can be configured to regulate the flow of fluid in two directions and are adjustable to allow for fine tuning of the flow rate. They control the movement of fluid in one direction, but in reverse the flow is free and cannot be regulated in the same was as it is when flowing forwards.

 

A pilot operated check valve is used to control the flow of hydraulic fluid to a cylinder, stopping it when needed to prevent unwanted movement of the cylinder.

 

A pressure relief valve is often used in conjunction with a pilot operated check valve or a solenoid valve to release the pressure contained by a pilot operated check valve, or to limit pressure in a control line leading to a solenoid valve.

 

Solenoid valves are often chosen over flow control valves for their ability to regulate the directional flow, instead of only being able to regulate in one direction. A flow control valve is suitable for applications where movement of a cylinder in one direction needs to be carefully regulated, but when it returns to the starting position no control is needed over the flow and speed of movement. They can be mounted in either direction, so it is up to the user which direction requires the control. For applications where control is needed over the flow rate in both directions (for example, in technologies that open and close gates or doors at a set speed) a solenoid valve is better as it allows for that fine control of movement and speed in both directions.

 

Replacement of Hydraulic Valves

 

In most cases a hydraulic valve will be replaced with one of the same type, and buying from YEOSHE ensures you will get a hydraulic valve that is ideal as a replacement even if your equipment is made by a different manufacturer. Sometimes a hydraulic valve needs to be replaced with one of a different type when machine specifications or usage changes, an example being a piece of machinery that used to use a flow control valve, but where there are operational advantages to having better control over the hydraulic flow in two directions.

 

Choosing the right type should be easy when replacing a hydraulic valve, as you can use the same type as before, but when designing a new piece of hydraulic machinery, the decision is a little harder. Understanding the basic function the machinery is required to perform is a must, but going a little further into the other functionality that may be required, or thinking about performance improvements that could be made with a different type of valve can inform a better design and result in hydraulic machinery that is more user friendly or that can fulfill more than the basic functions specified at the design stage.

 

If you need more information about hydraulic valves, please try to visit the website of YEOSHE Hydraulics Co., Ltd. The company can provide a variety of high quality industrial hydraulic valves for you to choose. Feel free to check out YEOSHE product pages and send inquiry to them.

 

 

Article Source: Hydraproducts Blog

How Does a Tube Straightener Work?

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In spite of great advances in manufacturing processes, still most of the tube and pipe production methods produce tubes that are neither round nor straight. In order to reduce ovality, and increase straightness, rotary straightening machines were developed.

 

The machines that are used for straightening are built with several methods of driving the rolls. While some machines have a discrete drive motor for every roll, majority of current machines use two drive motors – one for the top set of rolls and other one for the bottom set. Irrespective of the way in which the rolls are driven, it is essential that all the rolls revolve at equal speed from about 1 RPM to 2 RPM. Additionally, it is necessary for the manufacturer to build an electronic load sharing system to make sure the power required to straighten is shared equally between both the driving motors. A check of motor loading and roll RPM (Rotations per Minute) should be done, every time the rolls are changed. Further, this post will explain the working of a tube straightener.

 

Different Straightening Techniques:

 

Rotary tube straightening machines get their name from the tube that rotates while passing through the machine. The rolls hold and rotate the tube while feeding it through the machine. This is carried out until the entire or the desire length of the tube has been straightened. When the tube passes through the machine, it is exposed to two straightening forces, namely, bend (or offset) straightening, and pressure straightening.

 

  • Bend Straightening: One or more pairs of rolls can be adjusted to cause the tube to follow a curved path through the machine. Bending the tube in this manner is the main straightening action.

 

  • Pressure Straightening: Each pair of rolls can be adjusted so that the gap between them is slightly smaller than the outside diameter of the tube. As the tube passes through this limited gap, it is exposed to pressure. If this pressure is sufficient, then it causes the tube walls to be strained past their elastic limit, thereby causing some straightening of the tube. If the ability to squeeze the tube is used properly, it will help the tube to “round up”, thus removing some or all of its ovality.

 

You must carefully control the amount of bend, so that it has adequate force to take the tube past its elastic limit to achieve straightness.

 

Advantages of Additional Bending Moments:

 

Following are the advantages of additional bending moments:

 

  • With additional bending moments, the operator can apply a big bending moment at the first pair of deflecting rolls and lessen the linear moment. In this case, the final pair of rolls provides a finishing action.
  • Large number of plastic cyclic deflections helps to straighten the badly bent tubes.
  • They deliver more optimal straightening of the leading as well as the trailing end of the tube.
  • Materials such as copper tube can be so efficiently straightened that no traces of residues are left behind. Subsequent annealing does not change the tube’s straightness.
  • Last, but most importantly, they achieve lower straightness and ovality tolerances despite any increase in work hardening.

 

And then, let us understand how tube straightener is used.

 

How to Straighten a Tube By Using Tube Straightener?

 

Follow these simple steps to straighten a tube:

 

  • Step 1: Bend the end of the coiled tube
  • Step 2: Insert the tube into either side of the tool
  • Step 3: With the help of the adjustment knob on the top, bring the rollers into position, and feed the tube through
  • Step 4: After enough tube has cleared all the wheels, start pulling the tube through with constant pressure
  • Step 5: With the help of the adjustment knob, you can fine tune the alignment for the tube
  • Step 6: Pull the required length of the tube through the tool

 

All you have to do is, push the piece through the wheels and work it back and forth. You can fine tune the adjustment knob till all the bends have been straightened.

 

Learn more information about tube straightener, I recommend that you can visit the website of Maxclaw. The company is the professional manufacturer of tube tools. You can find tube cutters, tube benders, deburring tools, double flaring tools, and much more products on their site. Please feel free to check out Maxclaw website and feel free to send inquiry to let them know your requirements.

 

 

Article Source: https://www.woodwardfab.com/blog/how-does-a-tube-straightener-work-tube-straightening-techniques/

Help, I’m a Beginning Archer and I Don’t Know What to Buy!

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Whether you’re just getting started in archery or you’re getting back into the sport after being away from it a while, it can be confusing to know what equipment you should and should not get right away. There’s a ton of fancy and not-so-fancy stuff out there, but some of it is not really needed until you build up your skill level a bit.

 

We hope this article will help you understand what things you absolutely have to have to get started, what archery accessories is a good idea but you can do without at first, and which items you might start planning to pick up along the way.

 

Items You MUST Buy to Get Started

These are things you simply cannot do without, because they’re essential to the sport of archery, whether you’re just kicking around in the backyard or getting ready to take your archery out onto the competition range or the hunting lands.

 

a) The Bow

You will need a bow, of course. You can’t practice archery without a bow, and you should make sure you buy the best recurve bow that fits your budget.

 

b) The Bow Stringer

A bow stringer is essential to any recurve archer’s kit, because it is the only way to safely and consistently string a bow. The bow stringer helps you safely use your body weight to bend the recurve bow enough to slip the string over the limb tips. Your grandfather might have used a “step-through” method to do this, but that is dangerous for both you and your bow, so make sure you always use a bow stringer to put the string on your recurve bow.

 

c) Arrows

Arrows, along with field tips, are the next required item, and you should purchase more than one. Most sporting goods stores will sell you a 6-pack or more of arrows. It’s often a good idea to buy arrows at the same time that you’re buying your recurve, since the bow technician who helps you pick out a good recurve will be able to measure your draw length and help you buy the right size arrows. If this simply doesn’t work out for you, though, we have a handy guide on choosing arrows.

 

d) Nocking Points

The purpose of a nock point is to provide you with a constant place on your bow string to nock your arrow. This is important because it will provide consistency of shooting so your arrow has a better chance of going where you want it to go every time to shoot your bow. It also helps make sure you don’t nick your bow hand with the arrow’s fletching or vanes. You can make a nock point from brass points, from serving string, or from tape. The bow technician who helps you set up your bow or any experienced archer can help you with setting your nock point where you need it.

 

e) Targets

Once you have all your essential gear together, it’s time to go cast some arrows. But wait, what are you going to aim for? Targets are essential, and can be as simple or as fancy as you’d like. Some days, I’ll just draw a picture of a cottontail rabbit on a piece of paper and shoot at that, while other days I’m looking for more refined knowledge about where my arrows are landing and will use a circular bulls-eye target. In addition to the target, though, you need some sort of a backstop to stop your arrows from going straight through the target and out into somebody’s fence or arm. Archery shops and sporting goods stores sell foam blocks that serve nicely, but you can also use a few bales of hay.

 

Recommended, but Not Required Items

This list will let you know some items that are nice to have, but you do not absolutely have to invest in them right away. Most of these items are comfort-related, though, so you may consider purchasing or making the first two items no matter what just to make sure you can get the most enjoyment possible out of the sport.

 

a) Arm Guard

An arm guard covers your forearm, and sometimes your entire arm, to keep your sleeves, hair and skin out of the way of the bowstring as you release your arrow. As you start learning the proper technique, you should learn how to adjust your elbow vertically to keep most of your arm out of the way of the string, but until then, you should wear an arm guard that covers as much of your arm as possible. The string will smack or drag along your arm from time to time, especially as you’re learning the sport, and you don’t want your skin to be in the way when that happens.

 

b) Glove or Finger Tabs

If you shoot a bow without something to protect your fingers, you will end up with painful blisters that will eventually lead to problems with your release. You can wear a leather glove or finger tabs on your shooting hand to prevent these blisters. Modern finger tabs sometimes also include spacers that spread the index and middle fingers apart, helping to keep the archer from pinching the arrow.

 

The good news is that you do not have to buy this item. You can make your own finger tabs—Scout troops quite often make their own finger tabs, and the patterns or kits are readily available.

 

c) Arrow Rest

If your bow doesn’t include an arrow rest, this is something you may want to invest in early on. The arrow rest is what the arrow sets on as it is drawn, and can be a simple fixed rest or a complicated drop-away rest that falls out of the way as the arrow is released. For short-term use, some archers can use their hands as a makeshift arrow rest, but an actual rest is something you’ll want to install on your bow after you get it broken in and know you’re going to continue practicing archery. We will be adding an article soon to help you select the right arrow rest for your need, so stay tuned!

 

d) Broadhead Wrench

A broadhead wrench allows you to unscrew a broadhead tip from your arrow without slicing your fingers open. If you are only using field tips for your archery, this might be something you can wait on until you’re doing some sort of archery that requires broadheads.

 

e) Bow String Wax

If you look at your bowstring through a magnifying glass, you’ll see millions of fibers that make up just one strand of your string. If not properly lubricated, those fibers rub together and create friction that can lead to the strands snapping, thus shortening the life of your string. To help prevent that from happening, archers was their bow strings with bow string wax, which provides good lubrication while also providing a layer of protection against water and other elements you might encounter in the outdoors. Buy quality bowstring wax, wax your bowstring every 2 to 4 weeks, and your bowstring will last much longer.

 

Optional Items

The rest of these items are handy, but they are not necessary to have. They’ll make your archery a bit more fun, though, so these are definitely things to put on your wish list for later on down the road, when you know that archery is something you’re going to stick with.

 

 a) Sight

A sight is used to help you aim your bow. Most recurve bows don’t include sights; because many recurve bow archers prefer the challenge of instinctive shooting, or shooting without the aid of an aiming aid like a sight or another point of reference. Still, sights are perfectly legitimate to use, and can sometimes help the beginning archer learn where to look and how to aim for instinctive shooting.

 

 b) Quiver

A quiver is a container used for holding your arrows before you shoot them. Sometimes, archers will just stick their arrows into the ground, but this can be tough on the arrows and arrow tips and inconvenient for the archer. Some quivers attach to the bow while some are worn around the waist or shoulder. Quivers make it much quicker to pull a new arrow for the next shot. It’s not an essential bit of equipment, but it’s definitely nice to have.

 

 c) String Whisker Silencers

Whisker silencers are lightweight rubber silencers that reduce the noise of your bowstring without compromising the performance of your bow. These are not so important for backyard or target archery, but they are wonderful add-ons to your bowstring when you start bow hunting.

 

Summary

This list of items should get you started, as well as give you a wish list of items to buy as you build your skill as an archer and branch out to other forms of archery. If you have any questions about any of these items, or product recommendations, just let Man Kung Company know and they will help you out.

 

Established in 1988, the Man Kung Crossbow Manufacturer is dedicated to the design and manufacture of a wide range of crossbows, archery bows and related products. Since the company was established, they have always been dedicated to the research and development of new products to meet current market demands. Man Kung’s outstanding quality has won us a high reputation from both domestic and international customers.

 

More details, try to click here: https://www.archery-manufacturer.com/

 

 

Article Source: Recurve Bow Guide

The Best Impact Wrench Buying Guide

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An impact wrench is a must-have in the garage, but now it’s a must at home and inside the trunk of your car, so we offer for your convenience our very own 8-Step Impact Wrench Buying Guide.

 

A cordless impact wrench is both highly effective and efficient in removing and tightening bolts or screws that feel stuck in place. Having one is necessary in ensuring work is done both safely and swiftly.

 

Injury, however, could occur while using manual tools, the wrong tools, or simply old tools. Mishandling the tools or applications themselves can and do cause complications for the user, not the least of which are injuries, damage to property and machinery, and time that cannot be regained.

 

Acquiring and sticking to automatic and powerful tools like impact wrenches has become no less than necessary for both the professional and amateur alike. In order to help you better determine how best to make your cordless impact wrench purchase, below are some important tips for you to consider before blowing your money on a piece of hardware you will surely come to need around often—and thank your lucky stars for purchasing.

 

  1. High Torque

Simply put, this “power” is the bread and butter of any impact wrench, cordless, corded, or otherwise. Torque is defined by Hyper Physics as “the influence which tends to change the rotational movement of an object.” As it relates to the impact drill, the higher the amount of torque the tool has, the stronger the influence it will exert over the bolt or nut you have it working on.

 

Torque is typically in counted the hundreds. Make absolutely sure that it is not too low, which would only be good enough for intermediate purposes at best. No less than 200 or above is a good number to work with. Anything below is unacceptable! Remember what you want and will use this tool for—this is surely an area where you cannot skimp.

 

Life’s fast pace and development of technology can and does often require higher numbers, but these are not hard to stay abreast of because of the internet. You can easily stay updated by searching for this online – also, keep in mind that alternatives are always easy to find if you eventually think your main wrench falls below the standards that you need.

 

  1. High Rotations Per Minute (RPM)

When selecting an impact wrench that has impressive RPM’s, you will discover that 3,000 or above is an ideal number for basically any impact wrench. The impact tool relies on rotations to tighten or unwind a screw or nut in its place. More rotations translate to, of course, less effort on the part of the operator, as the cordless impact takes on the extra work speed itself.

 

Lower RPM can delay project completion so select a power tool that prioritizes RPM very much, even if the torque or Impacts Per Minute (IPM) may fall a bit below standard. The only exception to this, of course, is if you are simply not as concerned about finishing a task or project quickly.

 

Still, the faster the output shaft spins, the quicker your work can be done. While shopping in your favorite store or online retailer, remember to check the RPM ratings on the product before clicking the buy or reserve button in order to know just how fast your soon-to-be new impact wrench operates.

 

  1. High IPM

IPM (Impacts Per Minute), like RPM, should be suitably high enough because this power tool requires a LOT of contact to push down a screw or bolt and tighten or lose it. If it is not possible on your budget to have a high IPM impact tool, look for a device that balances the torque, RPM and IPM well.

 

The last (IPM) can fall off a bit if the first two (RPM and Torque) are great. Having more IPM means there is more contact between the tool and the intended target, and more contact means the targeted screw or lug nut stays firmly in position. It’s easy to see why this part of the tool is highly important, as well.

 

Couple this with a high torque and RPM and you have the makings of a nearly perfect impact wrench.

 

The next question would naturally be what source of power will your impact wrench use and how much are you willing to spend on it?

 

  1. Great Brand

Like most products out there, an excellent company or manufacturer will get you a lot when it comes to quality of the wrench you ultimately decide to buy and put to use.

 

Veteran brands, due to their established success, have all the privileges and experience to experiment on various designs and updates. Make sure you look into the catalogs of various companies first, in order to have a clear idea on what to buy for your garage or car.

 

New brands do come along here and there, of course, but with a still developing and improving technology like cordless impact wrenches, for example, it would be wiser to trust a brand that has been around for a long time. A tried and tested company would do you a lot of good when it comes to scanning for a potential impact wrench. Look up these trusted, veteran companies first and then check out what impact tool options they offer.

 

  1. Lightweight

Impact wrenches should be light enough for extended use and ease in carrying. If you haven’t picked up an impact or have only used a small variety of corded impacts, then you may actually find yourself surprised (and potentially dismayed) when your new battery-laden impact beast is plopped down at your front door and you lift the box. The good news is that there are many lighter-weight contenders out there that can fit both your application and comfort level simultaneously.

 

Lighter is always better if you are using the tool to screw in nuts and bolts with force. A lightweight tool is much better because it gives more mobility for the user and makes operating the power tool easier. This is especially true for those times when the impact is needed for a difficult project or for longer periods of time.

 

Lightweight wrenches must be prioritized since they make overall use easier and less strain on the wrist while operating on heavy work. Lighter is definitely better for a tool that will used for long periods of time.

 

It’s worth noting here that too many people have permanently damaged their wrists and hands and for no good reason, apart from making a few dollars. This is sad considering how many tools there are available to keep this very thing from happening. A lightweight tool is an excellent way to insure our bodies stay healthy and injury-free.

 

  1. Type of Impact Wrench

Depending on who you are, what you need, want, or think you need or want can vary. Not long ago, the only viable options for impact wrenches were electrical, corded versions, and the more popular compressed air versions. Due to the amazing work done by today’s leading tool manufacturers however, that has changed dramatically and now we have the wonderful option of the portable cordless impact wrench as well.

 

There are other options for the heavy-duty, industrial market of course, but they are outside the scope of this article so we won’t be covering them here.

 

  • Wired Electrical Impact Wrenches

These are 100% dependent upon having—and reaching—an AC outlet, therefore they are not given to situations that would require portability in or to remote locations. However, in certain situations and for certain people, they can keep the costs low and do what needs to be done.

 

They are typically ideal for those who do not need an impact quite as often, or perhaps those who are more like hobbyists, tinkerers, or light-duty, occasional home mechanics. In most cases, they are not as strong in the torque department as the compressed air wrenches, but they do provide enough power for the sporadic user.

 

Another added benefit of the electrical impact is that it doesn’t require the power source to be localized (on the tool itself) and therefore this makes the wrench a bit handier in tight spots.

 

  • Compressed Air Impact Wrenches

These impacts have been around since the dawn of time—or so it seems—and for good reasons.

 

Air tools have some excellent benefits and offer a wide variety of applications, provided one has a source of air provided nearby. While it may not be convenient for most people to lug around a small air tank in the trunk, it is still quite possible to keep one handy in the case of other needs as well, such as airing up a flattened tire on the roadside or perhaps an air mattress at the campsite.

 

The main benefits of the air impact are weight, power, and variety. This version of the impact needs relatively little local parts or mechanisms; therefore the design lends itself to many sizes and applications. “Inline air impact wrench” and “Pistol” impact designs vary, with the former appearing more like a screwdriver-style grip, while the latter should obviously conjure up images of the Wild West.

 

Similar to the electrical impact wrench, the compressed air version draws its power from elsewhere, allowing the tool’s design to focus only on performance and take up less room. This is especially true for the inline versions, which can be quite small—a great design for particular needs.

 

While the compressed air impact wrenches are more portable than their electrical brothers, they still fall short of the mark offered by the latest and increasingly popular member of the family.

 

  • Battery-Powered Cordless Impact Wrenches

In their early years, the battery-powered impact struggled in more than one category. The torque wasn’t yet there, the battery use time seemed shorter than the charge time (not to mention the battery life of the NiCads—shiver), and the prices were great for spitting out whatever you were drinking at the time of observation.

 

However, as they say, “Times they are a’ changin,” and the cordless impact wrench is one of the most useful, practical, valuable, and affordable innovations we have on the earth today.

 

Torque is no longer a problem as these tools come in an array of options for virtually any application, including the everyday, professional mechanic. Using our impact wrench buying guide’s sections above on features, you can choose which specifications are right for you. The same rings true for IPM, so the only remaining issues to consider are size, portability, and weight.

 

In way of size, one might think or suggest that this is where the cordless falls short of the electrical and air impacts, but this isn’t always the case. Years of innovations and advancements in both design and power source cause these cordless tools to be much more similar in size to their predecessors than before. Again, depending on application, we can choose the best impact wrench to suit our needs. Because of today’s technological advancements, we now have cordless impact wrenches that are strong, lighter, and easy to use. The added benefit is that today’s cordless tools are utilizing the Li-Ion (Lithium-Ion) batteries, which offer a compact size with power, use life, and longer lifespan.

 

Now that the cordless impact has gained so much ground on the traditional impacts in these other areas, it has become an essential part of our tool kits and even trunks, primarily due to the fact that they are the kings of portability. Toss it in the truck or car and go—no need to worry yourself or injure your body with large, unruly tools anymore. This is the main asset of the cordless tool: take it anywhere and do what you need to do.

 

  1. Safety Features

So, now you know that it is great to have an impact wrench that has high RPMs and IPMs for the best performance.

 

But in the midst of your starry-eyed shopping, don’t forget to select an impact wrench that is stocked up on the most important features of all: safety. An impact wrench is, after all, a power tool, therefore proper attention must be placed in not only knowing how to use it and what it does, but also what it is capable of.

 

A couple of important safety features include anti-overloading, cooling, etc. The best features on tools are designed for the explicit reason to keep us from sustaining injuries—these included safety mechanisms can save your life and improve the overall life of the tool.

 

Professional or not, these features are important because your safety should always be at the top of the list. The best in every field know that once you get this right, the other features can follow.

 

  1. Enjoy Your New Impact Wrench!

Now that you’ve got your grip with this handy impact wrench buying guide, we wish you the best of luck and congratulate you on your upcoming purchase! We have no doubt that you’ll enjoy your new impact power tool for years to come.

 

Get more impact wrench series information that you can try to check out KSPARK website. This company is specializing in kinds of air tools. Their products include air sander, air spray gun, airless pump, heavy duty impact wrench, air wrench, agitator mixer, and much more. More details, welcome to visit Kspark and feel free to send inquiry to them.

 

Article Source: https://wrenchguru.com/impact-wrench-buying-guide/

Plastic Extrusion: Advantages and Disadvantages of Plastic Extrusion

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Plastic Extrusion

Plastic extrusion is the process where plastic materials are converted from solid to liquid and then it is reconstituted into finished products. In other words, plastic is melted down and then reshaped into useful items. There are some advantages to plastic extrusion, but there are also a few disadvantages that must be considered.

 

Advantages of Plastic Extrusion

3 of the major advantages of plastic extrusion are as follows.

 

  • Low Cost: Compared to other molding processes, plastic extrusion molding has a low cost and is more efficient. The extrusion molding process uses thermoplastics and they undergo repeatedly melting and hardening, this allows the waste to be reused rather than be discarded. Raw material and disposal costs are lowered. Plastic extrusion machines operate continually and this reduces the chances of inventory shortage. It also allows for 24-hour manufacturing.

 

  • Better Flexibility: Extrusion molding will provide considerable flexibility in the products being manufactured with a consistent cross section. As long as the cross section stays the same, the extrusion molding can produce complex shapes. Minor alteration to the plastic extrusion process the manufacturers can use it for plastic sheets or produce products that mix plastic attributes.

 

  • After Extrusion Alterations: Plastics remain hot when they are removed from the extruder and this allows for post-extrusion manipulations. Many manufacturers will take advantages of this and use a variety of roller, shoes and dies to change the shape of the plastic as needed.

 

Disadvantages of Plastic Extrusion

Plastic extrusion has also some disadvantages.

 

  • Expansion: Once the hot plastic is removed from the extruder it will many times expand. This is called die swell. It is problematic to try and predict the exact degree of expansion. Because it is hard to predict the exact expansion, manufacturers often accept significant levels of deviation from the dimensions of the product.

 

  • Product Limitations: Extrusion plastic molding does place limits of the types of products that can be manufactured. There are alternatives that require an investment in a different type of extrusion equipment.

 

If you have any interest in plastic extrusion machinery, I recommend that you can visit the website of Leader Extrusion Machinery Company Ltd. They have more than 20 years’ experience designing and manufacturing plastic extrusion machinery. And the company specialty is manufacture of PP, PS, PVC, PC sheet extrusion lines; and PP, PC PET hollow profile sheet extrusion lines.

 

Learn more information about plastic extrusion machines, welcome to send inquiry to Leader Extrusion Machinery Company.

 

 

Article Source: http://civilengineersforum.com/plastic-extrusion-advantages-disadvantages/