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Re: Motor coupling
Posted by Ken Leung at 1/24/2001 10:41 PM EST
Student on team #192, Gunn Robotics Team, from Henry M. Gunn Senior High School.
In Reply to: Motor coupling
Posted by Athena on 1/24/2001 7:40 PM EST:
: We are attaching the motor coupling to our motor. There is no hole in the shaft for the screw. Is drilling a hole in the saft a good idea or should we do something else?
: thanx ^.^
Looking at the graph of the motor coupling, and I assume you are talking about the drill motor coupling, I believe you are talking about the 1/16" hole for the spring roll pin. It is intended to lock the coupling in place by preventing it from unscrewing. So yes, you will need to drill hole in the shaft, and yes, it is safe and a good idea to drill holes on the shaft for mounting this coupling as well as a common way of mounting sprockets on output shafts.
You want to make sure the hole on the shaft to be as small as possible, because the hole will weaken the structure of the shaft according to the size of both the shaft and the hole, and make sure you drill the hole through the center of the shaft. One method of making sure that happens is to use a short countersink bit to start a pilot hole to guide the 1/16" drill bit from sliding randomly on the curvy surface of the shaft.
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