A Picture Story

The router bit is cutting threads from scratch.  The turning dowel enters one side of the black jig containing the router bit, hits the bit and as the thread cutting begins, the thread engages the female threads on the far side of the jig. Thread size is adjusted by the depth of the router bit to fit the female threads cut by the taps.

The gizmo is called The Beall Wood Threader.

Bob, April 2010.