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Posted: Wed Nov 12, 2014 11:09 am
by peterm
I am with JPG! I have used pulleys with keyways and no key, no problem.
Ignore the keyway.
Posted: Wed Nov 12, 2014 11:24 am
by rjent
JPG wrote:The 'KB' weld is on the pulley. The set screw 'sets' into the flat on the shaft.
IIWM, I would ignore the keyway in the pulley.
I guess I need to brush up on my reading skills .....
But filling the key is even better ...
Posted: Wed Nov 12, 2014 12:14 pm
by Ed in Tampa
I agree ignore the key way.
The only time it would come into play is if the pulley was revolving on the shaft, but since it is fixed with set screw ignore it.
Posted: Wed Nov 12, 2014 1:11 pm
by JPG
Ed in Tampa wrote:I agree ignore the key way.
The only time it would come into play is if the pulley was revolving on the shaft, but since it is fixed with set screw ignore it.
The keyway(s)/key 'prevent' rotation on the shaft.
That is also the purpose of the flat(as well as to provide an area for the set screw to bite into the shaft without making it impossible to remove due to the burr created.
Posted: Thu Nov 13, 2014 10:24 am
by Ed in Tampa
JPG wrote:The keyway(s)/key 'prevent' rotation on the shaft.
That is also the purpose of the flat(as well as to provide an area for the set screw to bite into the shaft without making it impossible to remove due to the burr created.
DUH!
I was talking about using the pulley that had a keyway cut into it on an axle. I would think the edges of the keyway could cut into the axle or become a low spot on the rotating axis of the pulley.
Posted: Thu Nov 13, 2014 11:34 am
by JPG
Ed in Tampa wrote:DUH!
I was talking about using the pulley that had a keyway cut into it on an axle. I would think the edges of the keyway could cut into the axle or become a low spot on the rotating axis of the pulley.
That is why they are 'narrow'.
Posted: Thu Nov 13, 2014 11:53 pm
by docricketts
Seriously, you guys rock.
I'm going to stick with JPG on this one and, for now, ignore the keyway. However, I may cut a wider thread into the pulley and install a wider set screw with a flattened bottom to maximize contact with the flat on the shaft, just because I'm paranoid.
THANK YOU!!!
Posted: Fri Nov 14, 2014 12:12 am
by skou
JPG wrote:The 'KB' (JB?) weld is on the pulley. The set screw 'sets' into the flat on the shaft.
IIWM, I would ignore the keyway in the pulley.
I'm sticking with JPG on this one. And, since I'm a Parotthead at heart, I'll say, "don't worry, be happy!"
steve
Posted: Fri Nov 14, 2014 10:27 am
by ldh
Solve this problem the easy way and go to MKC Tools and get a ER headstock or motor pulley that is a perfect fit.
LDH