Quote:
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Originally Posted by Tristan Lall
188 not only used 10-32 screws in the front of the drill (you do only get 1 to 1.5 threads), but also machined an aluminum collar (bolted to the gearbox) to surround the drill. The collars had two machine screws which were tightened to press on the two circular recesses on the side of the drill. Those drills weren't going anywhere. (I'm a little bit concerned about using just the 10-32s--that seems like a dangerous proposition if the motor was struck from behind for any reason.)
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This (attached image) is what Tristan speaks of. For all you visual learners, it's the metal collar on the drill (which is the bottom motor) in the image. The collar is simply a big cylindrical piece of aluminum stock we hollowed out to fit a Bosch motor. You can see the press screws that sort of stick out. As a result, those collars (which we used last year as well), in conjunction with the normal 10-32s hold the drills in place perfectly, and we haven't had any problems with them. The CIMs are a different story though; they have come a bit loose before, but we'll fix that next year.