"Owen Lawrence" wrote in message
...

TDC? Top Dead Centre?

Yes


So you think the pulley is rocking/wobbling? I really cranked the set
screw and the pulley isn't wandering. I'll be very happy to try a new
pulley/key/set screw before taking more drastic measures if you really
think it'll help.


In the beginning I thought it was my motor also. When I tightened the set
screw the problem would disappear for a little while. I found that if the
set screw does not push down on the key and or flat grind on the shaft at a
90 degree angle, TDC, it can loosen again.

Mine made a distinct metallic clicking/ticking sound with every revolution.