The Park Tool BTS-1 Bottom Bracket Tapping & Facing Set, click to enlarge
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Item # BTS-1

/ Tools / Frame & Fork

Bottom Bracket Tapping & Facing Set

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.

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BTS-1 Features


  • 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)

Also available:

  • 36mm x 24 TPI right hand tap - Italian (2 required) (part #693)
  • 47mm x 1.0 TPI right hand tap T47 (part #647R)
  • 47mm x 1.0 TPI left hand tap T47 (part #647L)
  • 57mm facing cutter (part #690XL)

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


Parts & Accessories


Replacement Parts


45mm Facer


57mm Oversized Facer


65mm Oversized Facer


Left Hand Threaded English Tap


Right Hand Threaded English Tap


Left Hand Threaded T47 Tap


Right Hand Threaded T47 Tap