The BTS-1 is a precision tool system which provides a piloted means of tapping the threads in the bottom bracket shell of a frame. After tapping, the taps act as guides to keep the included facing cutter perfectly square with the axis of the bottom bracket for cleanup of the faces of the bottom bracket shell.


Also available:

36mm x 24 TPI right hand tap - Italian (2 required) (part #693)

NOTE: For sharpening services of cutting tools see Park Tool Sharpening Services. Always use cutting fluid such as Park Tool CF-2 when machining.

WARNING: California Proposition 65

This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.

https://cambriabike.com/pages/warning-california-proposition-65

Includes:

1.370" x 24 TPI right hand tap - English adjustable cup (part #691)
1.370" x 24 TPI left hand tap - English fixed cup (part #692)
45mm facing cutter (part #690)