Horizontal Machining Center Vs. Vertical Machining Center: Is a VMC or an HMC Better?

Every year, Modern Machine Shop does studies on the machine shop industry. One of the most helpful things they do is their Top Shops report, which does a detailed breakdown of the differences between what the fastest growing and most profitable machine shops are doing compared to the “average” machine shop.

 

Horizontal Machining Center Costs and Benefits

 

The top shops had higher gross sales per machine that average shop – $266,123 versus $152,000. That is huge. One of the major differences: top shops spent 10% of their gross revenues on equipment versus 2% for average shops.

 

One place that makes a difference: invest in horizontal machining centers. You probably know that a horizontal machining center (HMC) costs more than a vertical machining center (VMC) – but do you know that 61 percent of the “top shops” invest in HMCs – and an additional 41% of them also invest in multi-face tombstones?

 

More important: an HMC can be as productive as two or more VMCs. In fact an article written by Modern Machine Shop in 2013 called “Worth Three Machines” highlighted how one company used its HMC to do as much work as 3 VMCs.

 

Review of HMCs vs VMCs

 

HMCs cost a lot more than VMCs. How much more? The Association For Manufacturing Technology says the average HMC costs $375,000 vs. just $115,000 for the average VMC. That’s why 4 times as many VMCs are bought than HMCs every year.

 

If you look at just the cost of the machine, it might make sense to purchase a VMC, but if instead of looking at the price, you look at what you get for each dollar spent, the numbers look a little different.

 

Since very few companies pay cash for their machines, let’s look at monthly payments on HMCs Versus VMCs:

 

For an easy comparison, we’ll look at a 5-year lease on each machine, assuming your company has a good credit profile.

 

  • HMC average cost: $375,000. Average monthly lease payment: $7,050 per month
  • VMC average cost: $115,000. Average monthly lease payment: $2,250 per month
  • Difference in monthly payment: $4,800 per month

 

OK, so a HMC costs, on average, $4,800 a month more than a VMC. Yes, that’s a lot more, but the real question is:

 

Will the extra profits you reap by having that HMC be more than that $4,800 a month?

 

The key driver in machine tool utilization is spindle run time. This is where HMC’s really shine. The average spindle run time on an HMC is 85% versus 25% on a VMC. So what does that mean? That means, on average, less than a third of the labor required to make the same part.

 

Whether it makes sense to invest in the HMC depends on your business model, as obviously the savings in setup times from the HMC are more important on long runs than on short runs, but if you do any long run stuff at all, the savings are pretty apparent.

 

Figure the minimum cost of a machine operator after accounting for wages, benefits, labor burden, etc. has to be roughly $6,000 a month. Since your HMC can do the work of three VMCs, it would cost $18,000 in labor to do the same work on VMCs as you get done on HMC’s.

 

True Costs and Pricing of HMC VS VMC

 

OK, yes, the example above is a little bit simplified, but doing an apple to apples comparison, it gets us “close enough” to the info we need to make a decision. With everything else being equal:

 

An HMC costs $4,800 more per month to finance than a VMC.

Using a VMC will cost you $12,000 per month more in labor than an HMC.

All other things being equal, the HMC will save you $12,000-$4,800, or $7,200 a month.

 

Let’s repeat that: after taking into account the extra monthly cost of the HMC, it will still save you $7,200 a month in labor costs.

 

As an added bonus, more expensive equipment can typically be financed for longer period of time: on the average $375,000 you would be able to finance for 7 years instead of just 5, which would drop your payment from $7,050 per month to $5,450 per month.

 

In both cases, if you lease you should be able to write off the entire payment as an operating expense, with the option to buy the equipment at the end for 10% of the original price. Another option, is an equipment finance agreement, which costs a little bit more (roughly 8% higher payments) but you would own the equipment at the end for $1.

 

The advantage of leasing over buying – tax treatment. Prior to January 2014 Section 179 of the tax code gave you a huge upfront deduction (up to $500k) when purchasing but that number has been curtailed to just $25,000 for 2014 so leasing is starting to make more sense for most companies.

 

Which Is Better?

 

The choice of Horizontal Machining Center or Vertical Machining Center depends on your business model, and some other things, but hopefully this article has given you something to chew on while making this decision.

 

If you need more information about vertical machining center and horizontal machining center, I recommend that you can visit the website of CNC-TAKANG: www.takangcnc.com. The company provides a variety of machine tools for you. Learn more details, please do not hesitate to contact with CNC-TAKANG.

 

 

Article Source: https://www.smarterfinanceusa.com/blog/vmc-vs-hmc

Investing In 5 Axis CNC Machining Center

Is It Really Worthwhile Investing In 5 Axis CNC Machining?

 

It wasn’t too long ago when metal fabricators and manufacturers were wondering why they should switch to CNC machining from the manual mills that they were already using. Today, when it comes to investing in 5 axis machining center technologies, the situation is quite similar. Many have been left behind simply due to the fact that they did not switch to CNC soon enough. When it comes to competing effectively and staying a top, it is a must for businesses to invest in the latest technologies.

 

The term “5-axis” machining may often confuse some people not familiar with this concept. Many manufacturers and shopkeepers think that they do not have the work load that would require the use of this type of process. Considering the fact that 5-sided machining can be facilitated with 5 axis machining centers, there is plenty of ways in which using a 5-axis CNC machine can prove to be beneficial. This means that even if there is no simultaneous 5-axis work, more profits can be earned if parts currently being produced using 3-axis machines are produced on a 5 axis machining center through 5-sided machining.

 

Why Is 5-Axis CNC Machining A Better Choice?

 

With 3-axis machines, multiple setups are required for each side of the part, setup time increases and accuracy decreases. On the other hand, when it comes to 5-axis CNC machining, setup time for the production of parts is reduced, accuracy is increased, and shop capability is also expanded for future work.

 

Is Simultaneous 5-Axis CNC Machining Is Even Better?

 

Yes, Simultaneous 5-axis CNC machining has its pros as well as its cons, but it is somewhat in certain aspects. For instance, if 5-sided machining never fails to impress, simultaneous 5-axis machining happens to be much faster. If a part can really be created with 5-sided machining rather than simultaneous 5-axis machining, then there is no harm in using it. However, both have their own pros. The benefits of 5-sided machining include the fact that it cuts fast enough, it can be programmed easily, its roughing strategy is remarkable, and generally, there are barely any issues involving tool interference. Similarly, what makes simultaneous 5-axis CNC machining beneficial is that the surface finish tends to be much better, the tool is enabled to reach difficult places seamlessly, and the tool life tends to be longer.

 

Mold Work

 

One example where you should definitely consider the use of a simultaneous 5 axis CNC machining center would be mold work, based on the mold. There tends to be limitations if 3-axis machining is used to manufacture the mold, especially when it comes to core molds that tend to be taller or the deep cavity molds.

 

Although a 3-axis CNC machining center can be used for mold work, if the work involves a deep-cavity mold, it becomes essentially to use long and skinny tools. While using these long and skinny tools, the feed rates have to be slowed down so that chatter is minimized and tool breakage is prevented. Often, the quality required quality of surface finish can be achieved when 3-axis machining is used for mold work. For fine finishing operations, particularly when it comes to small molds with a small diameter, the process can become more difficult than necessary if 3-axis machining is used.

 

When it comes to simultaneous 5-axis CNC machining, shorter and stouter tools can be used, as a result of which pushing faster with greater feed rates becomes possible. If simultaneous 5-axis machining is used for mold work, then heavier cuts can be taken and z-depths do not turn out to become a problem. As a result of all of this, the time frame in using the machine is also drastically reduced.

 

If you need further details about 5 Axis Machining Centers, welcome to visit the website of CNC-TAKANG where provides various machining centers and lathes. Do not hesitate to contact us for more information!

 

 

Article Source: http://EzineArticles.com/8443120