12-notch 多孔工具，适用于 bbinfinite T47a 底座轴承

12-notch Tool for bbinfinite T47a bottom bracket

2023-07-25 00:10:50

使用说明

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Summary

Replacement for the installation tool BBinfinite ships with their T47a bottom brackets (T47 asymmetrical a.k.a. BBRight or BBcorrect).
The 12-notch tool sits on the non-drive side and is clamped onto the BB shell with a threaded rod and the plate on the drive side. This prevents the tool from slipping off. Torque can then be applied to the NDS through a socket wrench size 32.

I designed this because my (original) installation tool slipped off and I stripped some of the nylon teeth. Also, the 16-notch interface of the tool wouldn't let me use my torque wrench and I couldn't justify the investment for an adapter I'd only need once.

Tool dimensions:

oD = 50,0mm
iD = 47,7mm
12 notches

I've attached the .stp-file for you to modify, in case you need different wrench sizes.

Disclaimer: While I provide all data and information to the best of my knowledge, I take no responsibility for any damage - whether to your accessories, bike or body! If you choose to install printed parts to your bike, that's entirely on you!

Print Settings

Rafts:
No
Supports:
No
Infill:
100%
Notes:
Obviously you should use a sufficiently strong filament to withstand the torque of 30Nm. I've used extrudr GreenTEC Pro and even 100% infill to be on the safe side.

There are two versions; v1 is a two-part design, but if your printer can handle the overhang, you might as well print the single-piece version 2.