Park Tool BBT-147-12 Steel Bottom Bracket Tool

Constructed from precision-machined 4140 steel, the BBT-147-12 is a heavy duty tool for the removal and installation of select threaded bottom brackets with 12-notch tool fittings, including Chris KingA(R) ThreadFit(TM) T47 and ThreadFit(TM) 30. The BBT-147-12 is designed to be compatible with any bottom bracket with the corresponding tool fitting, with an extra-deep body to accommodate extra-wide spindles and low-profile walls at the point of engagement for recessed lockrings. The BBT-147-12 has three methods of tool engagement-a 3/8" drive fitting, a 1" hex fitting, and 36 mm wrench flats-allowing you to take on even the most seized bottom bracket cups. For added stability, the BBT-147-12 features integrated threads for use with the Park Tool BBT-RS Bottom Bracket Tool Retaining System or GPS-1 Guide Pins (each sold separately). Fits 12-notch threaded bottom bracket tool fittings with a major diameter (outside of notches) of 50-53 mm and a minor diameter (inside of notches) of 48.2 mm, including: BBInfiniteA(R) T47 Chris KingA(R) ThreadFit(TM) 30 Chris KingA(R) ThreadFit(TM) T47 Chris KingA(R) ThreadFit(TM) T47 24x Chris KingA(R) ThreadFit(TM) T47 30 Hambini T47 RotorA(R) T47 External 30 mm RotorA(R) BBrightA(R), BB30, BB386EVO, and PF30 thread-together Tool specifications: 3/8" drive fitting 1" and 36 mm wrench flats 57.5 mm (2.264") outer diameter at point of engagement Internal clearance: 42 mm (1.654") depth (from tool face) x 30.44 mm (1.198") diameter Not rated for use with impact drivers