Monthly Archives: November 2017

How to Choose a Youth Bow

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Archery is a sport for children to learn and enjoy. Even the youngest of children can start off with archery toys, one with safe rubber or suction cup-tipped arrows. By the time young archers reach the age of 8 or so, it is important to select a bow of the right size and type.

 

Step 1

Determine whether your child is right-eye or left-eye dominant. Have your child stand facing toward a wall that has some kind of feature on it–a clock, a picture, etc. Tell your child to point to the clock, picture, etc., and then close his right eye. If his finger stays in the same place, he is left-eye dominant and you should choose a left-handed bow. If his finger appears to “jump” so it is now pointing somewhere to the right of the object, he is right-eye dominant, and will need a right-handed bow.

 

Step 2

Measure your child’s entire arm span to help you determine what draw length bow you should purchase. Draw length is the measure of how far the bow can be drawn back. Have her spread her arms out with her palms facing forwards. Run a tape measure from the tip of one middle finger to the other. Once you have this measurement, divide it by 2.5. This should give you the correct draw length for the bow you’ll be purchasing.

 

Step 3

Select a bow of the proper length for your child. Unlike draw length, this measurement refers to the bow itself, how many inches it measures from top to bottom. Youth bows tend to measure between 31 and 41 inches in length, but you should have your child try out several bows at different lengths to see which one is most comfortable.

 

Step 4

Estimate the draw weight your child will need in a bow. This refers to the pounds of pressure that will need to be exerted to draw a bow back to its fullest extension. A child weighing between 50 and 70 pounds will usually be able to pull a draw weight of 10 to 15 pounds. For a child weighing 70 to 100 pounds, a draw weight between 15 and 25 pounds would be appropriate, and a draw weight of 25 to 35 or 40 pounds should work for a child weighing between 100 and 130 pounds. Children between 130 and 150 pounds ought to be able to handle draw weights between 40 and 50 pounds.

 

Step 5

Take into account budgetary considerations. If your child is new to the sport of archery and this is something you’re just trying out to see if he likes it, select one of the lower-priced models. You can usually find some type of beginner bow in the $40 to $50 range. If your child really enjoys archery, however, and wants to get into competition or bow hunting, you may wish to select a model specially made for his needs and interests costing anywhere from $100 to $400 or even more. Be sure to take into account that your child is still growing, though. You may not want to mortgage the house to purchase archery equipment that he is likely to outgrow in a year or so.

 

Man Kung, the company is dedicated to the design and manufacture of a wide range of crossbows, archery bows and related products. You also can find archery toys on their website. If you are looking for high quality archery products, please do not miss Man Kung, it will be the best supplier for you.

 

More details, check out here: www.archery-manufacturer.com

 

 

Article Source: https://www.livestrong.com/article/28232-choose-youth-bow/

When Is Ultrasonic Polishing Equipment Justified?

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Ultrasonic polishing is ideal and justifiable when work on small to very small details is required.

 

Manual polishing is a very tedious process, and in particular very small intricate detail work requires additional effort and patience. Ultrasonic lapping machines, available now for quite some time, have been improved in recent years to effectively replace certain time-consuming and costly small detail hand finishing work.

 

Ultrasonic Unit Features

By comparison to conventional die profilers, as well as air-powered lapping machines that may have a stroke length of up to ¼ inch, the reciprocating action of an ultrasonic unit ranges only from .00004 to .00012 inches. However, the extremely fast reciprocating tool motion of 21,000 and up to 25,000 strokes per second provides the extra productivity and gives the polisher complete fingertip control when finishing even the most intricate ridges, slots and details.

 

Ultrasonic systems usually consist of an electronic power module (110 or 220 volt) with a slender electric cord that powers the lightweight and easy to manipulate small, ultrasonic handpiece. Commonly, an automatic power feed system in the module adjusts the frequency required to accommodate the various individual abrasive tools that are installed for the finishing process. The systems are equipped with numerous clamps that will accommodate tools ranging from small diamond files to conventional type polishing stones and/or ceramic stones and laps.

 

As with all other power tools, great care and attention should be given when working with ultrasonic machines. Because of the ultra-fast motion, tools that are overly aggressive (especially coarse diamond files, etc.) should never be used. Surfaces that must be flawless can easily be scratched and made wavy or damaged.

 

On the other hand, dense/hard, fine grit ceramic or vitrified abrasive polishing stones or laps made of brass and cast iron when used with premium diamond compound, permit the beginner to acquire a better understanding of the fast cutting powers these ultrasonic systems offer. Note: Only the most experienced operator should use diamond files or diamond stones for ultrasonic polishing.

 

Ultrasonic Applications

We need to stay objective and remind ourselves that ultrasonic polishing is not for everyone. Frequently, ultrasonic systems are perceived to take care of all polishing problems. This is not so. Ultrasonic polishing is not a cure-all for every mold and die shop that does in-house polishing. There are many polishing professionals and/or mold shops—doing mostly mid-size to large work—that may not require an ultrasonic system. In many instances, the units are simply not practical for mid-size to large type work and ultrasonic systems are not recommended to be used on larger details and surfaces exceeding a 3/8-inch square.

 

Nevertheless, ultrasonic finishing has its place in a polishing environment and it is not overstated to say that in some instances the cost of one ultrasonic system may be recouped by polishing three to four multiple cavity/core molds. For instance, an experienced individual, when working with an ultrasonic polishing machine on very small details, may reduce finishing time by as much as 40 percent and up to 65 percent.

 

In the past, there have been several good, but very expensive ultrasonic systems on the market. The name of one system may differ from the other, yet they all practically evolved from one source. However, several new models, which have been recently developed and have proved to be highly effective, as well as very affordable for even the smallest mold shop or polishing house, are now available in the marketplace.

 

Ultrasonic Advantages

Ultrasonic units with super-fast, very short strokes, provide virtual unrestricted fingertip control. By comparison, regular reciprocating tools—such as air-driven or electric flexible shaft-operated die profilers—are more restrictive in movement and less flexible to handle.

 

Nevertheless, die profilers and/or various other filing machines are great for medium to large mold details and when used at a comfortable speed range and proper stroke lengths they will provide excellent finishing capabilities.

 

Ultrasonic polishing is ideal and justifiable when work on small to very small details is required. It is safe to say that the smaller, more intricate or precise the finishing work needs to be, and/or the harder the materials are which require finishing, the more likely it is that an ultrasonic unit will improve polishing time. Subsequently, complicated heat-treated molds and dies, carbide dies or inserts and detailed punches with fine edges and very narrow slots machined by EDM are perfect for using ultrasonic polishing systems.

 

It should be mentioned here that there are other advantages that make certain ultrasonic systems a practical purchase. Meaning, various models offer dual operating capabilities where the electronic power module not only has the ability to drive the ultrasonic handpiece, but also regulate the speed and rotational direction for a variety of rotary and/or reciprocating hand tools. Having these secondary functions presents additional cost savings over single function ultrasonic units as they permit a full range of filing/reciprocating capabilities as well as rotational grinding/polishing using mounted points, burs, polishing brushes and felt bobs. Furthermore, since the rotary or reciprocating hand tools are powered with internal DC motors, the thin electrical cord provides more freedom of movement when compared to flexible shaft powered tools.

 

Summary

When selecting a supplier for this type of equipment it is most prudent to purchase from a respectable company that has been around for many years, offers good customer service and has some experience in ultrasonic polishing, which can be passed on to the customer, even via the telephone.

 

I think Best Diamond Industrial Co., Ltd. will be the most excellent choice. Besdia supplies high quality ultrasonic lapping machine and much more tools for you. Learn more information about Besida, welcome to check out the website here: www.besdia.com

 

 

Article Source: https://www.moldmakingtechnology.com/careers/when-is-ultrasonic-polishing-equipment-justified

The Best Baseball Practice Nets Supplier in Taiwan – Holy Hoe Enterprise Co., Ltd.

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Holyhoe practice net is ideal for use for baseball practice. Lightweight, easy to set up, and with incredible versatility.

 

If you are a baseball pitcher and want to make your college or school team, or even the major leagues, you have to practice more than you can possibly imagine. While there are many ways of practicing, the most effective way you can consider is by having your own pitching net.

 

Through this, you will be able to develop your skills at your own pace without interference from anyone. Baseball pitching nets have been around for quite a long time. They are mostly used for practice, with some versatile enough for soccer and basketballs. Since the primary task of this equipment is to help with training, it’s important that you go for premium quality ones. After all, you want something that can last for ages and transform you into an elite player within minutes.

 

Here, I’m going to recommend you a baseball practice net manufacturer – Holy Hoe Enterprise Co., Ltd.

 

The Sport Nets Manufacturer in Taiwan

 

Holyhoe, a company with more than 40 year professional experience, provides the complete solutions for the sports nets and accessories. Holyhoe has been supplying high quality products to the international customers around the globe.

 

Holyhoe sport nets include tennis nets, volleyball nets, badminton nets, soccer nets, basketball nets, baseball practice nets, golf practice nets, beach volleyball sets and much more.

 

In this article, I only introduce baseball practice nets. Other else sport nets, please try to check out Holyhoe’s website.

 

High Quality Baseball Practice Nets from Holyhoe

 

Holyhoe offers four types of baseball practice nets for you to select.

 

Model:

 

  • BR-2001 model – protective screen, regular style baseball practice net.

 

  • BR-2002 model – target style for pitcher baseball practice net, with a mouth and a movable net, pitching target practice screen net.

 

  • BR-2003 model – target style with sock net for hitter, baseball batting practice net.

 

  • BR-2004 model – pitcher style L screen baseball practice net, pitcher safety L screen nets.

 

Features:

 

Holyhoe’s baseball practice nets are easy to set up. Suitable for indoor and outdoor using. With anti-UV and water-resistant, all weather designed.

 

Summary

 

There are a lot of things to consider before you purchase a baseball pitching net.

 

  • Strength of the frame: as this promotes stability as well as helps in high-intensity training.
  • Versatility
  • Quality of the net

 

Price does not matter much since most of these products are not costly. If you are interested in learning more information about sport nets, try to check out the product pages of Holyhoe. You’ll find the ideal products on their website.

 

Holy Hoe Enterprise Co., Ltd.

No.18, Paitang Lane, Tatsun Hsiang, Changhua Hsien, Taiwan 51543

TEL: 886-4-8526116 / 7

FAX: 886-4-8526118

E-mail: holyhoe@ms24.hinet.net / holyhoe@holyhoe.com

 

Article Source: https://ahjoo.com/top-best-pitching-nets-reviews/

What are Aramid Fiber and The Best Aramid Fabrics Manufacturer?

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Aramid fibers are man-made high-performance fibers, with molecules that are characterized by relatively rigid polymer chains. These molecules are linked by strong hydrogen bonds that transfer mechanical stress very efficiently, making it possible to use chains of relatively low molecular weight.

 

The term “aramid” is short for “aromatic polyamide”. Aromatic polyamides were first applied commercially as meta-aramid fibers in the early 1960s, with para-aramid fibers being developed in the 1960s and 1970s.

 

Aramid fibers share some general characteristics that distinguish them from other synthetic fibers:

 

  • High strength
  • Good resistance to abrasion
  • Good resistance to organic solvents
  • Non-conductive
  • No melting point
  • Low flammability
  • Good fabric integrity at elevated temperatures

 

These unique characteristics derive from the combination of having stiff polymer molecules with a strong crystal orientation as well as close interaction between the polymer chains due to the hydrogen bonds.

 

Advantages of Aramid Fiber

Aramid main advantages are high strength and low weight. Like graphite, it has a slightly negative axial coefficient of thermal expansion, which means aramid laminates can be made thermally stable in dimensions. Unlike graphite, it is very resistant to impact and abrasion damage. It can be made waterproof when combined with other materials like epoxy. It can be used as a composite with rubber retaining its flexibility. High tensile modulus and low breakage elongation combined with very good resistance to chemicals make it the right choice for different composite structural parts in various applications.

 

Aramid Fiber Disadvantages

On the other side, aramid has a few disadvantages. The fibers absorb moisture, so aramid composites are more sensitive to the environment than glass or graphite composites. For this reason, it must be combined with moisture resistant materials like epoxy systems. Compressive properties are relatively poor too. Consequently, aramid is not used in bridge building or wherever this kind of resistance is needed. Also, aramid fibers are difficult to cut and to grind without special equipment (e.g. special scissors for cutting, special drill bits). Finally, they suffer some corrosion and are degraded by UV light. For this reason they must be properly coated.

 

Aramid Fabrics Manufacturing Expert

If you need more information about aramid fabrics, I recommend that you can visit the website of TEI. Taiwan Electric Insulator was established in 1978 as a manufacturer of aramid fabrics, including aramid fiber fabric, ballistic aramid fabric and colored aramid fabric.

 

The aramid fabric features flame resistance, outstanding shock absorption, and superb engineering benefits to all manners of manufacturing and design in the composite industry. To go with the ever-changing requirements, TEI is dedicated to development and innovation of aramid fabric to meet the highest level of customers’ satisfactions. Find more details about aramid fabric, please do not hesitate to send inquiry to TEI.

 

Article Source:

https://www.teijinaramid.com/what-is-aramid/

http://www.aramid.eu/advantages—disadvantages.html

Beginners Guide To The Impact Wrench

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If you’ve ever experienced trying to loosen a large, fretted or corroded fixing, then you’ll appreciate what I’m about to say. Often working in tight spaces or at awkward angles, nuts and bolts can be extremely difficult and time consuming to fit or remove. Skinned knuckles, broken tools and jobs taking hours longer than you’d planned, all contribute to the frustration that nuts and bolts cause on a daily basis for people across the world. Even experienced professionals, such as fitters and mechanics, will experience these problems on a regular basis.

 

The solution? Well, there are a number of factors to consider, but the most important is the force you apply to the fixing. Without adequate force, the fixing will either be under tightened (under torqued) or simply won’t come undone. Secondly, and this is particularly important for busy professionals, the time taken to fit or remove a fixing can be painstakingly long if it is in a hard to reach position. Similarly, the time taken up by repetitive jobs, like removing and refitting vehicle wheels, can really add up over the course of a day and eat into your profit margin or your family’s patience.

 

Using an impact wrench solves both these problems. It is capable of delivering a much larger force than you can apply by hand, without additional leverage, and it greatly speeds up the tightening and loosening of fixings, especially those that are hard to reach. So, if you can relate to what I said earlier, you’ll want to read on.

 

What Is An Impact Wrench And How Does It Work?

An impact wrench is used to aid the tightening and loosening of nuts and bolts by reducing the effort required by the user and increasing the speed at which fixings can be tightened or loosened. There are a variety of different types on the market but they all work in fundamentally the same way. Essentially, they apply a rotational force (or torque) in short bursts (or impacts). They are driven by a motor which is powered by air, mains electricity, or battery (usually referred to as a “cordless impact wrench”).

 

Because the force is applied in short bursts, the user is able to apply a much larger torque to the fixing than they would use a regular wrench; sometimes with only one hand. This greatly reduces the effort required by the user, which results in less fatigue and fewer injuries or strains. The time required to complete a task is also reduced meaning that the user can finish the job faster and, in the case of a business, generate greater revenue and profit.

 

Which Type Is Right For Me?

Of the 3 different types of impact wrench, air, electric and cordless, each has its advantages over the others. Originally, only the air impact wrench was available and used mainly by professional and race mechanics to quickly remove and refit wheel nuts (lug nuts). Depending on the model, air tools are powerful, fast and robust making them ideal for use in a professional environment. However, they do require a large volume, high pressure air supply to operate and regular maintenance, which means they aren’t really suitable for infrequent or home use. And, as they’re attached to the compressed air supply by an airline, it can be difficult to move them around a workspace.

 

The corded electric impact wrench is also powerful and fast (again, depending on the model) but is less robust than the equivalent air tool. It too is attached by a cord making it difficult to move around a workspace and, of course, it cannot be used in the absence of a mains electricity supply. However, it can be less expensive than an air or cordless impact wrench, making it an attractive choice for home use.

 

Perhaps the most sought after, particularly in recent years as the technology has improved, and are cordless (battery powered) impact wrenches. The more expensive, higher voltage units deliver performance approaching that of an equivalent air tool but without the additional infrastructure. They are also completely portable and the absence of a cord means they can be moved easily around a workspace and used in hard to access areas. Unfortunately, they are often the most expensive and can be relatively heavy due to the weight of the battery packs.

 

At present, air impact wrenches remain the most popular with professional mechanics. But, as technology continues to improve, the cordless impact wrench will become increasingly popular, less expensive, and ultimately dominate the market.

 

Kspark International Ltd. is the company of specializing in a variety of impact wrenches including heavy duty impact wrench series, super heavy duty impact wrench series and angle heavy duty impact wrenches. If you have any interest in impact wrench, try to check out Kspark’s website to see the full specification of each product and find the ideal one you need. More details, click here: www.kspark-spraygun.com

 

 

Article Source: http://impact-wrench-reviews.com/articles/beginners-guide-to-the-impact-wrench/

The Advantages of Shrink Fit Chuck

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If you do high speed, or high torque machining you should seriously consider the benefits of shrink fit technology.

 

Heat shrink tooling is considered one of the best methods for high-performance machining. The mold and die industry was the first segment of the manufacturing market to look for more precise tool holder options, due to the need for a slim nose and long reach. Today, every segment of manufacturing can benefit from the advantages of shrink fit tooling.

 

In this article, I’m going to show you the basic introduction to shrink fit chuck.

 

Tool holder Selection

 

When looking for tool holder solutions for any type of machining, it is always good to focus on the three main features that a tool holder must bring you:

 

  1. Rigidity

Rigidity comes from sufficient taper contact and proper clamping of the tool holder in the machine tool spindle.

 

  1. Accuracy

Accuracy comes from minimal run-out at the cutting edge of the cutting tool when clamped in the holder.

 

  1. Balance

Balance comes from a balanced assembly of the tool holder (including all accessories such as pull-studs) and cutting tool combination.

 

You may also often think about the following:

 

  • Geometry of Tool Holder

Geometry is important to avoid collisions with the workpiece. In regards to the EDM process, electrodes must be machined accurately and efficiently. Oftentimes, deep ribs are required in the part process and may present challenges. Also, deep cavities such as large door panel or bumper molds require deep reach with extreme clearances.

 

  • Cleanliness of The Tool Holder

Cleanliness is required to avoid excessive run-out, especially when machining graphite.

 

  • Extending Cutting Tool Life

Since high-end cutting tools are needed to obtain the best performance in the shortest time possible, a tool holder that extends cutting tool life can be advantageous. These cutting tools often have exotic coatings that lend to an expensive price.

 

  • Surface Finish at Higher Speeds and Feeds

Some tool holders are used with lower depth-of-cuts, which translates into better surface finishes. This makes balance even more important to minimize vibration at the cutting edge of the cutting tool. Also, proper chip evacuation provides better finishes.

 

Advantages of Shrink Fit Chuck

 

There are 10 inherent benefits that a good shrink fit chuck can offer:

 

  1. Unsurpassed Accuracy

A properly produced shrink fit chuck should be able to guarantee 0.00012’’ (3 microns) maximum run-out at three times the cutting tool diameter.

 

  1. Availability of Slim Profiles

Shrink fit chucks are available with three-degree draft angles and very slim profiles. They can also be modified to be straight walled, if needed, in order to prevent tool holder collision with the workpiece.

 

  1. Gripping Torque

A shrink fit chuck grips the cutting tool 360 degrees around the shank. This leads to a very high gripping torque that prevents the cutting tool from moving during roughing or finishing operations.

 

  1. Extended Reach Options

Shrink fit chucks can use shrink fit extensions that provide the user with many options with standard products. When machining deep cavities, one can place shrink fit extensions into standard shrink fit chucks, getting unsurpassed tool holder lengths with very little run-out.

 

  1. Balance Repeatability and Balanceable Options

Shrink fit chucks can offer some of the best balance repeatability of any tool holding system on the market, since there are no moving parts. In many cases, if a shop purchases a properly balanced shrink fit chuck with correct accessories (such as pull-studs) and uses good cutting tools without inherent unbalance (such as flats or unequal spacing), then they can often have good balance characteristics for running at high speeds without doing an additional fine-tune balancing.

 

  1. Reduction of Tool Changing Time and Less Tool Holder Accessory Inventory

Nothing beats the tool change time of shrink fit chucks if the process is joined with a capable inductive shrink fit machine. Tool changes can be done in 5 to 10 seconds, and most importantly, consistently. This allows the tool holder assembly to be in the machine making chips more of the time, rather than out of the machine waiting to be changed. Also, a shop needs very little additional tool holder accessory inventory (i.e., collets, nuts, seal disks, etc.). This simplifies the process.

 

  1. Cleanliness of Setup

A shrink fit chuck typically is a sealed system by design. Therefore, the introduction of contaminants in the bore is minimized. If contaminants are introduced to the bore of a tool holder, oftentimes run-out accuracy is compromised.

 

  1. Coolant Options

Shrink fit chucks have convenient methods to deliver coolant down to the cutting edge of the cutting tool. This helps with the proper removal of chips and can also aid in providing better finishes.

 

  1. Consistency of Setup

Shrink fit holders provide the great repeatability from tool holder setup to tool holder setup. This is especially beneficial for those shops running lights out. For example, all tool holder setup operators set the tool holders the same with shrink fit holders. There are no variables—such as over-tightening or under-tightening a collet nut or not cleaning out a chuck sufficiently.

 

  1. Availability of Shrink Chucks

Most of the major tool holder builders in the world now offer shrink fit chucks as a standard.

 

If you have any question about shrink fit tooling, I recommend that you can visit SYIC’s website and feel free to send inquiry to them. SYIC is the company of specializing in shrink fits, tool holders, and milling chucks etc. Learn more details about their products, try to check out their product pages!

 

 

Article Source: https://www.triumphtool.com/metal-working-tools-blog/advantages-heat-shrink-tooling/

How to Choose a Suitable Wetsuit

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Unless you are fortunate enough to live in the tropics, you know how important a wetsuit is to your comfort and health when surfing in the chilly waters of the open ocean. There is a wide array of wetsuit types to choose from, as well a range of material thicknesses, allowing you to customize your gear to the water and weather conditions wherever you may be.

 

Types of Wetsuit

 

  • FULL SUIT:

This suit envelops your entire body, usually with long sleeves (some have short sleeves) and full leg coverage.

 

  • SPRING SUIT / SHORTY:

With legs that cut off a few inches below the knee, and either short or long-sleeved arms, this suit is designed for warmer conditions and is usually made of a thinner material.

 

  • FARMER JOHNS:

The overall of the surfing world, this suit is sleeveless with long legs, designed for use with a rash guard on days when the outside air is warm.

 

  • SHORT JOHNS:

This suit is a shorter version of the Farmer John, with the same sleeveless construction but the cooler feel of cut-off legs.

 

  • MIX-AND-MATCH PIECES:

Neoprene vests, jackets and shorts, all made with the same construction as a typical wetsuit, fall into this category. These pieces allow customization based on the weather and temperature, both in and out of the water.

 

Wetsuit Materials

 

  • NEOPRENE

The idea behind a wetsuit is to permit a small about of water to seep into the suit initially, which, once heated by your body, forms an insulating layer of warmth. Foam neoprene, treated with water-repellant chemicals, prevents the cold ocean water from continuing to wash in and disturb the temperature within the suit.

 

The thickness of the suit determines how warm the surfer will remain after time spent submerged in the frigid water; the fatter the material, the warmer he’ll be. Neoprene panels come in several thicknesses: usually between 1-6 millimeters. Depending on the water temp, neoprene wetsuits are usually pieced together using different thicknesses of neoprene, heavier on the chest and back areas, and thinner on the arms, legs and shoulders. This multi-thickness construction leads to nominal classifications such as 3/2mm (3mm on the core and 2mm on the extremities, in this case).

 

  • BACKING MATERIALS

Because of neoprene’s rigid and grippy nature, it can be really tough to yank on a wetsuit and pull it up into place. Luckily, suit manufacturers figured out a way to lessen the resistance formed between the wetsuit and the rider’s skin. Smooth skin nylon facing is attached to the inside of the wetsuit, making getting in and out much easier, as well as providing added warmth to the surfer. Sometimes, the material is attached to both the inside and outside of the suit – a material construction known as Nylon 2 – which increases warmth, but also makes the suit more bulky. Smooth skin was a needed advance in wetsuit construction; however the added bulk coupled with a decreased durability in nylon-backed suits are the unfortunate side effects of such a progression. Manufacturers have now begun using lycra, spandex and even wool blends as a replacement for raw nylon backing, leading to wetsuits with much more flex and stretch, and a more streamlined fit.

 

Fit of Wetsuit

 

The fit of a wetsuit is not only important for comfort’s sake but also to ensure that the suit is properly insulating the wearer. Basically, the pocket of extra space between the suit and the surfer’s skin is designed to trap and heat a layer of ocean water to provide a cocoon of warmth. If a wetsuit is too baggy, the water won’t heat up enough; if it’s too tight, there won’t be enough water to heat. Either way, a proper fit is the only way to get the most out of a wetsuit.

 

The way that the neoprene material flexes and moves is also a significant aspect of a suit’s fit. To surf in comfort, you need to have a wide range of motion through the shoulders and knees to help you paddle and pop up with fluid motions.

 

If you are interested in learning more information and images about wetsuits, I recommend that you can visit the website of Pacific Eagle Enterprise Co., Ltd… The company is specializing in neoprene wetsuit, breathable hunting waders, boot foot waders, wetsuit socks, and much more. For more details, click here: www.pacificeagle.com to obtain the information you need.

 

 

Article Source: https://www.tactics.com/info/how-to-choose-a-wetsuit

Tips to Help with Choosing the Right Valve for Your Project

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Valves are useful pieces of equipment that help control, limit, and shut off flow in a system. In a garden irrigation system, you could use valves to control when different plants get watered. While it is universally agreed that valves are helpful, choosing the right valve can be frustrating. We hear many customers make statements like these: “So many types exist! Some of them do similar things! I don’t know what types of valves to use!”

 

In this article, we will outline what makes each unique valve. For basic users, the most important thing to remember is that a valve does one of two things: shut off or regulate. Some valves can do either/both, but this is a simple way to think of what you need a valve to do. It could help you in picking the right valve. We will now cover each of the major valve categories.

 

Ball Valves

Ball valves are a good example of a shut off valve. They use a spherical seating to stop or allow flow. The ball has a hole through the center, so fluid can pass through when the handle is turned to the “on” position. When the handle is turned 90 degrees to the “off” position, fluid hits the solid side of the ball and is stopped.

 

Butterfly Valves

Butterfly valves can function as a shut off valve or as a regulatory valve. They can fully shut off flow or be kept partially open, which limits flow. Controlling flow can be extremely helpful if you want to decrease pressure in a system. Fluid passing through a small opening will be restricted, making pressure further down the pipeline lower, depending on how far open the valve is. Butterfly valves can also be used as typical 90-degree turn valves, just switching between “on” and “off” positions.

 

Gate Valves

Gate valves, while usually used as shut off valves, can also function as regulatory valves. They use a “gate” that drops or lifts to control flow. When the valve is open, the gate is stored in the tall upper section of the valve, which is where gate valves get their unique shape. Unlike the previous two valves, gate valves are not a quarter-turn valve. They use a hand wheel to open/close whereas ball and butterfly valves use a lever handle. This makes it easy to keep them partially open and also makes operation of any kind easier.

 

Check Valves

Check valves come in many forms. The primary function of check valves is to prevent backflow. This makes them regulatory valves, as they control flow direction. Check valves are controlled by the fluid in the pipeline instead an operator, which makes them different from the valves we have previously examined. Check valves come in many different forms, but we will just cover the two most common types.

 

Swing check valves are a type of valve that uses a swinging function to prevent backflow in a system. The clear PVC swing check valve to the right has a disc that swings open if fluid is passing through the desired direction. If anything tries to flow backwards, the disc is pushed closed, stopping flow. Swing check valves create minimal pressure drop, as the disc is pushed completely out of the way when in operation.

 

The other major type of check valve is the ball check valve. Ball check valves use a ball or half-ball seating to eliminate backflow. When fluid passes the desired direction, it hits the rounded side and passes around and through. If fluid tries to flow backwards, it hits the concave side of the half-ball, pushing the valve shut. Due to the fact that fluid must flow around and behind the ball to get through, ball check valves produce moderate pressure drop.

 

Diaphragm Valves

Diaphragm valves, while not one of the most common types of valves, are very interesting and serve a specific purpose. They are perfect for limiting pressure in a system, making them regulatory valves. These valves have a flexible diaphragm that lowers toward or rises from a “weir” or “saddle” seating. The effect is that only a limited amount of fluid is allowed to pass through.

 

Choosing the Right Valve

In the end, picking the right valve depends on what you need it to do. No two jobs are the same, so there is no one-size-fits-all valve solution. However, you should now have all the information you need to make an informed decision.

 

NICO VALVES CORP. is a leading industrial valve manufacturer in Taiwan and China. The company offers various valves such as check valve, ball valve, threaded end valve, wafer check valve etc. If you have any questions, try to check out NICO’s website and feel free to send inquiry to them.

 

Article Source: https://www.pvcfittingsonline.com/resource-center/choosing-the-right-valve/

Gear Rack and Pinion in Straight Cut and Helical

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Tell you some information about precision rack and pinion in this article.

 

Rack and Pinion

 

Rack and Pinion assemblies are utilized to convert rotating movement into linear motion. A gear rack has straight teeth cut into one surface of a square or round section rod with a pinion, which is a small cylindrical gear meshing with the gear rack.

 

There are applications where the gear rack is stationary, while the pinion traverses and others where the pinion rotates on a fixed axis while the gear rack moves. The former is used widely in conveying systems while the latter can be used in extrusion systems and lifting/lowering applications.

 

As a mechanical element to transfer rotary into linear motion, gear racks are often compared to ball screws. There are pros and cons. The advantages of a gear rack are its mechanical simplicity, large load carrying capacity, no limit to the length, etc. One disadvantage though is the backlash. The advantage of a ball screw is the high precision and lower backlash while the shortcomings include the limit in length due to deflection.

 

Types of Gear Rack

Rack and pinion gears are available in two variations:

 

Straight teeth have the tooth axis parallel to the axis of rotation. Straight teeth that run parallel to the axis of the gear.

 

Helical teeth gears provide continuous engagement along the tooth length and are often quieter and more efficient than straight tooth gears and also offer higher loading for same rack width. Helical tooth gears resemble spur gears in the plane of rotation, but include teeth that are twisted along a helical path in the axial direction.

 

Applications of Rack and Pinion

 

Rack and Pinion drives are perfect for a wide range of applications, including axis drives requiring precise positioning & repeatability, travelling gantries & columns, pick & place robots, CNC routers and material handling systems. Heavy load capacities and duty cycles can also be easily handled with these drives. Industries served include Material Handling, Automation, Automotive, Aerospace, Machine Tool and Robotics.

 

JIA CHENG Precision Machinery Co., Ltd. reducer is a worldwide well-known brand. This company also provides high quality couplings, gear row, precision rack, and much more products for customers. If you need more information about planetary reducers and precision racks, try to check out Jia Cheng’s website to obtain further details you need.

 

 

Article Source: http://btprecision.com.au/index.php/rack-and-pinion/

Ceramic Capacitors and Reliable Capacitors Manufacturer

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The ceramic capacitor is available in many versions including leaded disc ceramic capacitors, surface mount multilayer ceramic capacitors, MLCCs etc.

 

Ceramic capacitors are one of the most widely used forms of capacitor used in electronics equipment these days.

 

Ceramic capacitors have also been used for many years, being found in valve or tube circuits dating from the 1930s.

 

Today ceramic capacitors area available in a variety of formats ranging from leaded components to surface mount technology, SMT varieties. As leaded versions disc ceramic capacitors are widely available, and as SMT devices, multilayer ceramic capacitors or MLCCs are available in all the common formats. As such these ceramic capacitors are used in virtually every type of electronics equipment.

 

The actual performance of the ceramic capacitors is highly dependent upon the dielectric used. Using modern dielectrics, very high values are available, but it is also necessary to check parameters such as the temperature coefficient and tolerance. Different levels of performance are often governed by the dielectric used, and therefore it is necessary to choose the type of dielectric in the ceramic capacitor.

 

Ceramic capacitors range in value from figures as low as a few Pico farads to around 0.1 microfarads. In view of the wide range and suitability for RF applications they are used for coupling and decoupling applications in particular. Here they are by far the most commonly used type being cheap and reliable and the loss factor is particularly low although this is dependent on the exact dielectric in use.

 

Basics of Ceramic Capacitor

Ceramic capacitors are the workhorses of the capacitor world these days. Ceramic capacitors are used in millions as a result of a combination of their cost and performance. There is a wide variety of dielectrics that can be used as described below, but as the name of the ceramic capacitor suggests, they are all ceramic in nature.

 

In order to ensure that sufficient levels of capacitance can be obtained within a single capacitor package, ceramic capacitors, like types of capacitor have multiple layers. This increases the level of capacitance to enable the required values of capacitance to be achieved.

 

Ceramic capacitors are available now in three main types although other styles are available:

 

  • Leaded disc ceramic capacitors for through hole mounting which are resin coated
  • Surface mount multilayer ceramic capacitors
  • Specialist microwave bare leadless disc ceramic capacitors that are designed to sit in a slot in the PCB and are soldered in place

 

Although it is possible to obtain other types of ceramic capacitor, these are the main types that can be found today. Of these the surface mount variety is used in the greatest quantities by far because of the manufacturing methods used these days for electronic equipment.

 

Capacitors Supplying Expert

Zonkas Electronic specializes in manufacture of Ceramic Capacitors which are applied to various industries. The ceramic capacitor is a capacitor constructed of alternating layers of metal and ceramic, with the ceramic material acting as the dielectric. The company has well-equipped manufacturing facilities that are operated by a team of experts. The strong team comprises of engineers, technicians, marketing professionals, quality analysts and customer services.

 

If you want to learn more information about ceramic capacitor manufacturer and capacitors, try to check out Zonkas’s website: www.zonkas-cap.com to obtain the details you need.

 

 

Article Source: http://www.radio-electronics.com/info/data/capacitor/ceramic-capacitor.php