Remix of UCI brake lever inclination tool

Check the brake lever inclination on a road bike that may be subject to the UCI's recent rules. Based on the official UCI version, modified for faster and easier printing with less waste. Information on the UCI original at the bottom of the description.

My version

My version keeps “part 3” (hinge pin) and “part 4” (measuring extension) unmodified from the originals except orientation so they load properly in the slicer.

Changes I made to the other parts:

Part 1 (lower bar alignment piece)

• Modified the hinge parts so they can be printed without supports.
• Changed depth on UCI logo from 3mm to 0.25mm. This removes big overhangs which accomplish nothing, the UCI logo will still be visible but print faster and better.
• Removed tiny version text “V.01/09” from the top edge of the part and moved it to the same face as the UCI logo, making it larger and more readable. Also followed the same minimal depth as the UCI logo so it's readable but not absurdly deep.

Part 2 (upper lever angle measuring piece)

• Adjusted print orientation so supports are not needed at all. Some bridging will happen at the base of the V shape, but this won't affect usage of the tool.
• Adjusted hinge area so it can also print without supports.

These changes should completely remove the need for supports, and still retain the functionality. 

Updates

6 Feb 2024 - Changed print orientation of Part 2 to make it more reliable to print. It now prints on the backside and still requires no support but now requires no brim and prints better. Adjusted Part 1 to provide clearance for adjustments to Part 2.

Printing

No supports. Detail is low so a larger nozzle can help with print time, but there are still big gains to be made by removing the supports. I printed with three shells and 20% gyroid infill as strength isn't critical, but you don't want it to be too flexible.

Adding a brim onPart 3 (hinge pin) is probably a good idea.

The UCI included gcode for the Prusa MK3S projected over 8 hours print time, while my modified version, sliced for a MK3S at 0.25mm layer height will take only 4:37. On a MK4, projected print time at a 0.2mm layer height (0.4mm nozzle) is 2:33, and a BambuLab X1C at 0.28mm layer height is 2:14.

UCI original model

On the same day that I posted my version of the UCI brake lever inclination tool, several folks sent me links to the UCI having shared their own.

To get the UCI version: https://www.uci.org/equipment/bh2JJzw1eB0n876rX2iB1

This will take you to the “Equipment” page. Scroll to the bottom and expand “UCI 3D PRINTING MODEL REPOSITORY” and click on the link for the “BRAKE HOOD BODY INCLINATION TOOL”. This will take you to the UCI's SharePoint where you can download the STLs. There is also gcode for the Prusa MK3S, but I should mention that their use of supports is quite heavy handed so I'm not sure I'd recommend using that gcode unless you want to be 100% certain your printed version matches theirs exactly.

Alternately, this is the direct link to the Sharepoint site, although that may change over time.

License

The UCI specified no license that I have seen, so I am assuming Public Domain, although I am trying to get confirmation on that. If I hear differently I will either adjust my license or remove this remix if they specify a license that prevents it.

• Adjusted text depth and location to enhance printability
• Adjusted hinge parts to enable printing without support
• Adjusted print orientation of part 2 to eliminate support use