5C collet closer


Ruth Busch
 

I purchased a 1958 South Bend 10L that came with a set of 5C collets.  The lathe has a collet closer lever that mounts on the left of the headstock. 

 

How should I be using the collet closer?  I noticed sometimes when I adjust the closer knob and pull the lever to tighten the collet, it will sort of snap and the stock seem firmly gripped.  Other times I cannot find the snap and grip point when I adjust the knob and pull the lever; this causes me to question if the work is properly gripped.

 

What is going on?

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