Sleeve plug for attachment to a spindle head

摘要

A quickly attachable and releasable assembly for attachment to a spindle head includes a plug casing insertable into the spindle head, a stop nut thereon, and two bushings loosely connected to the nut. One bushing carries a plurality of locking balls and the other bushing has a cam surface to urge the balls inwardly to engage the head. A spring urges the bushings apart to cause the cam surface to so operate.