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View Full Version : I am looking for a cheap source for racks.



outlawspeeder
11-25-2016, 10:51 AM
I am looking for a cheap source for Boston racks.

I am building a CNC plasma cutter 4x4 foot. This makes ball screws costly. I can also go with geared belts but I thinking with the crap from the cutter, they will not last long.

Paul Alciatore
11-25-2016, 01:02 PM
E-Bay?

http://www.ebay.com/sch/Business-Industrial/12576/i.html?_from=R40&_nkw=rack+and+pinion

outlawspeeder
11-25-2016, 01:10 PM
I think I am back to ball screws, No bearing blocks or couplers. I'll turn down the ends and build bearing blocks. 37 dollars for 1200mm. I just have t
o figure out how to turn the ends.

Jaakko Fagerlund
11-25-2016, 02:05 PM
Go with the belts if you want a fast machine, easily built and easily adjustable system, the belt comes in rolls and costs next to nothing. Ball screws will say bye-bye quite quickly in the vicinity of a plasma cutter unless completely covered with flexible rubber shields.

If you are adamant in using ball screws, get the end-machining from the factory, they are PITA to turn as they are induction hardened and you want to get it absolutely dead-center or you lose the benefits of the ball-screw.