keeping hex-shaped shafts in the couplings

[kiracofe8]

Originally posted by DaveG702
My team has recently run into a problem. We looked at our drill motors and found that the hex-shaped shafts that were designed to work with the flexible couplings are moving in and out when we drive our motors forward, and back when we drive backward. Can someone please help us out

We noticed the same problem. We have thought of several ways to correct this. Here is what we are trying right now: Tap a hole for a 4-40 machine screw into the Aluminum hex piece. Drill a clearance hole in the plastic coupler. Then fasten the two pieces together with a screw. This, admittedly, is a bad hack. However it was quick and cheap. If this fails, our backup plan is to remake the Aluminum hex pieces ourselves, except out of 1" round stock instead of hex stock. Then, we'll go to the MSC catalog and buy a standard off the shelf shaft coupler to replace that goofy plastic one.

/* Daniel */