Shimano Centerlock 1/2" Drive Adapter

THIS DESIGN IS COMPATIBLE WITH THRU-AXLE HUBS! WIN! It's even support-free! 👍

Printable replacement for Shimano TL-FC36 , TL-FC32, or Park Tool BBT-69.4, among others. Shimano uses the same 16 spline pattern for some Hollowtech II BBs as well as the Centerlock lockrings. This allows you to get the proper torque by using a torque wrench vs. having a regular wrench tool without a way to accurately get the correct torque.

I recommend printing it out of a CF or GF reinforced filament, such as PLA-CF or ABS-CF, depending on your printer's capabilities. I did print a version out of regular ABS to test and it did fine.

Please print hot and slow to maximize layer adhesion. I have ZERO issues with layer adhesion/separation with this tool. The weak spot is the 1/2" drive, which if printed out of a softer material, will round out. I haven't experienced this with PLA-CF, PETG-CF, or regular ABS (the three I've tried with so far), but I know enough about regular PETG that it likely would round out so I would not recommend using regular PETG.

I used 8 walls, 6 top layers, 6 bottom layers, and 50% triangle infill. I'm sure these details are not wildly critical so long as they are sufficient, but I tend to be overkill.