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The 9 Advantages of the Eurotech Rapido over Swiss

 1.  Work envelope - Ease of setup. It’s all about safety! Swiss are flexible but to work on them is a nightmare. Every time you work on it you’re getting cut up, banged up; oil drips down on your cuts, etc. It is hygienically a huge problem. You want room in the machine to work in, so the work envelope space of the machine is very important to the guys on the shop floor. Swiss do not give you much room to work in.

2.   Work envelope -chip control. This is a major problem on Swiss machines. Yes, you can turn the part but where do the chips go? They wrap up on next tool right beside it. They fall halfway down in the chip tank. The next tool picks them up. For parts that are square or rectangular and you’re taking huge volumes of material off, (especially with materials such as nickel alloys, aluminum and copper), you can’t break the chip up and high pressure coolant is not always effective at pushing the chip from the tool.  You need good chip flow as well as a decent cycle time but with the small work envelope of the Swiss it’s a huge headache. The Star SR32 has 8 cubic feet inside the machine; the Eurotech Rapido has work space of 22 cubic feet inside machine. That’s almost three times more volume for tool changes, chip control, and coolant flow and everything else that goes with it. Not an issue on the Eurotech Rapido.

B436 Y2

3.  Horsepower and Rigidity. For high metal removal rates, Swiss machines often do not have the power needed to get the job done efficiently.  Combined power on the Star SR32 is 8.9 kilowatts. The Eurotech Rapido has 24 kilowatts of power. This is a BIG difference. With horse power comes rigidity. We ran the same parts on Swiss and the Eurotech Rapido and found that the Eurotech Rapido had double tool life simply because of the larger tool holder. Vibration wasn’t transmitting from the work piece to the tool holder.  

4. Guide Bushing Support – part example – muzzle break with 150 holes in it. Star SR20 has ¾ of an inch of bearing surface on the guide bushing so once you machine ¾ of an inch you can never machine more than that and then go back. We try never to do any secondary or off line deburring. So once you’ve machined it, it’s going to drop out of the support of the guide bushing. You’d have to break this part up into thirds  which gives you blend lines – it’s impossible to get a perfect blend between those two rough and finish passes. We want to make our parts look like a diamond – perfect. We don’t want the blend lines but they are unavoidable on Swiss. Not an issue on the Eurotech Rapido.

5.  Bar Stock Quality. With a Swiss a lot of companies like to run ground stock but it’s not optimal. (Grind lines on ground stock are perpendicular to your axis of force so grind lines are going around a bar, while you’re trying to push against the grind lines). Swiss do not require ground stock; however, without it, we have to hold an OD tolerance of +/-0.0003” within material lot.  Having to retension a guide-bushing between different lots of the same material is a huge waste of time.  Long unattended runs over a weekend are not possible on Swiss machines unless sufficient material from one lot is available.  With Eurotech lot control is not required, as in a brass part, we can load up the Rapido with mixed lots of material and run for 48 hours unattended as the size variations from the different material lots is compensated for by the collet where the guide-bushing of a Swiss machine would prevent this.

6. Chucking and Manual Operations. We try to service customers as best as we can and sometimes that requires small runs of manual parts or modifying existing parts. We don’t have manual equipment. Locating the part in the sub-spindle of a Swiss because it is not long enough for the guide-bushing support causes many issues in maintaining length and positional tolerances.  While we really hate to stop the efficiency of working off a bar to hand load a Rapido, occasionally, it is necessary, easy, and meets a customer’s critical need.

7. Resale Value is much better with Eurotech than Swiss. Any machine purchase for a job shop has risk. You never know what job you’re going to have month to month, day to day. The risk is much less with conventional CNC’s, especially Eurotech as they hold their value longer than any machine I’ve ever seen.

8. Operator Capability – you need a “contemplative operator” for Swiss. Machining a complex part on Swiss is like playing chess.  You have to be thinking many moves ahead and a crash is just a brief distraction away.  Conventional is much simpler and it’s far, far easier to train a new operator on Eurotech than Swiss. 

9. Transition Point – The defining point for parts to be run on Swiss or conventional is .687 (11/16). From 11/16 and over it is almost always far better to run on the Eurotech Rapido.

“The Rapido is scary fast.  It is the perfect machine for parts from the 20 mm to 36 mm diameter.”  –Dave Fricke, Millenium Mfg.

lehigh collage

Millenium Manufacturing Background

Dave Fricke and his partner founded their job shop in 1999 – Millenium Manufacturing. Dave was not a machinist by trade but took a class at a tech school on machining. He fell in love with it and decided it was something he was interested in getting into. The first product he looked at was Star and when he asked their advice on what size machine he should begin with, such as 10 mm, 16, 20, 32; the response was, “Go with the smallest machine there is – you’re going to make a lot of scrap and it’s a lot cheaper on small parts than on large!” (Wonderful advice, said Dave)

“The beginning was brutal,” said Dave, “we worked after work, on the weekends in the garage for two years but we got over the hump. Now we are primarily a job shop and have our own product in the firearms components,” explained Dave. And that’s where Lehigh Defense comes in. Dave’s second company Lehigh Defense recently awarded “Best Ammo of 2013” by TTAG.

The company runs three shifts and has 25 employees. Their equipment includes: 2 Wickman multi-spindles, 2 Tornos CNC, 6 Star Swiss, 1 Star moving headstock, 6 Traub Swiss 12 and 13 axis machines, 2 Nakamura NTY3’s, 6 Eurotechs and 2 vertical machining centers. The average run size for conventional is 500 pieces; and the average run size for Swiss is 3000 pieces.

“Our business model has changed a lot from the beginning. It is very dynamic and nothing like what we planned. We have found over time that we have to be adaptive and flexible. It follows too that we need the machines to change with us,” said Dave. The company works with only one job classification, i.e., setup, programmer and operator. There is no inspection department; every employee is in quality. The night shift includes three guys that run 17 machines and the day shift is a man to machine ratio of 1 to 5.


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