BB2042: Steel T47, 2" OD x 74 mm Wide

BB2042: Steel T47, 2" OD x 74 mm Wide

18 In stock

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This T47 bottom bracket shell is machined from 2" x .095" wall 4130 steel tubing. The outside diameter is the the stock tube diameter. The width is 74 mm, supplied 1 mm oversize to allow clean up after welding. The threads are M47 x 1, right and left hand, with a thread length of 0.50". The left hand thread is identified by a radial groove on the face of the shell. The minor diameter of the thread is 46 mm +.1/-0 and is relieved on the inside diameter to 47.75 mm +/- 0.1.

Important Information
  1. Use our heatsink FT5004 (see Related Products on this page).
  2. Use our tap FT2001 (see Related Products on this page).  Note:  do no apply excessive force on the tap, it will break!  See our Guidelines for Use.
  3. Video of how to tap a T47 bottom bracket shell here.

Item sold individually.



Item Number BB2042
Alloy 4130
Weight/Grams 150
Style T47
Outside Diameter 2.000"
Actual Width 74 mm
STEP File (right click, "save as") BB2042
PDF Drawing BB2042