Quarter Turn Mount for Topeak Tubular Bike Rack
Print Profile(1)
Bill of Materials
- Quarter Turn Adapter x 1: https://www.amazon.com/dp/B0B4FTD4T1
- Loctite Blue 242 Thread Locker x 1: optional, but recommended
- M4 Hex Nuts x 3: https://www.mcmaster.com/90591a255
- M4 Flat Washers x 3: https://www.mcmaster.com/93475A230
- M4 Hex Head Screws x 3: https://www.mcmaster.com/91280A134
Description
This is an offset mount that allows quarter turn accessories to attach to the bike rack. The washer is optional but I would recommend it so that there's less stress on the mounting bracket.
I bought the insert kit off of Amazon (I got the Garmin version) and it has worked amazingly! I think that the other options will probably fit as well but I havent tried them personally. I'd also suggest using Threadlocker if you can to prevent the screw/nut getting loose from vibrations.
I used ASA filament for the mount body for its strength and UV resistance. Not sure how other filaments will hold up in this scenario.
For the “washer”, I used TPU 85A with the basic settings in Bambu Studio. This is an optional part to print but it will absorb a lot of the vibration and friction when the bike is moving. TPU is a bit tricky to print with but not bad if you take the time to watch Bambu's videos. You will also need a .6mm nozzle to print this due to Bambu's requirement.
When mounting the quarter-turn insert, I used the longer screws that came in the package to make sure the threads were working. Once they were good, I switched to the smaller screws.
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