Strippit, Inc.

Eric J Helda

An adjustable punch assembly includes a releasable locking means for selectively allowing relative rotation between a threadably mated punch cap and punch driver for punch length adjustment. The releasable locking means includes a locking element, preferably a ball bearing, residing in a passage extending in a radial direction in the punch cap to open opposite a splined index portion of the punch driver. The splined index portion includes a plurality of angularly spaced grooves each extending in an axial direction of the punch driver, whereby a corresponding groove opposite the passage is engaged by the locking element. A plunger in its locked position confines the locking element in locking engagement with the punch cap and punch driver, and is movable to an unlocked position wherein the locking element is no longer confined in locking engagement to permit punch length adjustment.

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Cheektowaga, NY, United States of America

Eric J Helda