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#1
 
10-04-2007, 01:11 AM
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A rotating nut will work great, apply some preload to the hollow shaft bearings to remove end play, and pull the screw on both ends as much as your frame work will allow, and depending on your loads, you might want to use a keyway on one side to lock the screw, I have used rotating ball screw nuts with good success, but one issue with rotating a ball nut is that some ball nut mounting flanges are not 100% centered or balanced and have to be adjusted for when mounting it to your hollow drive shaft, I will post a couple of pics, of one that I have built, when I dig it out from the big pile, IMO the two main advantages are the use of smaller dia. screws with higher speed servo motors, www.rockcliffmachine.com    |
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