Retractable prewinder assembly with infinite adjustability for installation of helically coiled wire inserts

摘要

A prewinder apparatus (12) attachable to a drive tool to install a helical coil insert (18) includes a body connected to the drive tool (20). An adapter rotates and is releasably connected to the body at operator selected positions. A prewinder portion (14) displaces in/out of the body. The prewinder portion translates into the body until a fastener engaged with the prewinder portion contacts a stop member (74) defining a predetermined helical coil insert insertion depth. A mandrel (16) axially extends from the prewinder portion when the prewinder portion moves into the body to rotatably insert the helical coil insert. A clutch engages/disengages the mandrel from a drive member. A second clutch or a stall device stalls the drive tool after coil insertion.