Overgrip collets, also referred to as over-the-shoulder collets, are used on a pick-off spindle when it is required to clear a shoulder and grip on a smaller diameter beyond. A good example of this type of part would be a screw. Hardinge has developed and now manufactures standard TF-25 OG overgrip collets for Citizen M20 and L720 lathes. Extra spread is required to open the collet wide enough to go over the screw head or larger diameter. Hardinge’s collet design incorporates teardrop slots and reduced wall thickness for maximum flexibility for the overgrip pick-off process.
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