06-12-2023, 08:48 AM
Slowly tighten the spindle nut until any end play is eliminated in the shaft movement. Turn the spindle with your hand and get a feel of how easy it is to turn especially when starting from a dead stop. Tighten the spindle nut just a smidge and turn the spindle again to feel for a change in resistance. You want to get to the point when you can feel just a SLIGHT amount of drag when you turn the spindle. Just like you want to feel a slight amount of drag on a feeler gauge when setting the gap on spark plugs for example. You can always tighten it a bit later if it loosens up after running in. Better a bit loose than too tight. 
It would be nice if we had a starting torque spec (5 - 8 in.lbs.?) to set the preload on these machines but I haven't seen anyone attempt do the math on that as of yet.
It would be nice if we had a starting torque spec (5 - 8 in.lbs.?) to set the preload on these machines but I haven't seen anyone attempt do the math on that as of yet.
Willie