Hoernles Belt Tensioner

Hi everyone,

What is a belt tensioner you might ask? A belt tensioner uses telemetry data from a simracing game and translates it into movements of a racing harness. Under braking the belts will pull back and tries to simmulate the feeling you have when you are pushed into your harness under heavy braking in a real car.

Here you find only the required STLs for this belt tensioner project. The build instructions and 3d model are uploaded in the OverTake and VirtualRacing forum as well as in the Good Vibrations discord channel.

Print settings:
Use support for the downward facing imbedded nut holes. For the belt rollers, don't use a support for the groove and the belt guides but use it for the downward facing nut hole.
Use the recommended print settings from the SFX100 project for the small and large pulley. Check out their homepage for the details.

Update June 2026

• Added 2 jaw versions of the 24 and 48 teeth pulley and the belt roller

Update November 2025:

• Updated some parts
• Added side cover and drive cover for 80ST

Update July 2025:

• Added parts for version 1.5 and deleted previous v1.4 files.

Update October 2024:

• Added parts for the single axis belt tensioner.

Update May 2024:

• Added parts for version 1.4 and deleted previous v1.3 files.

Update June 2023:

• Added 3D-printed pulley for D20L25 couplings that come with two jaws instead of three (e.g. Amy Chen`s shop). Piece was designed by MacRozie from the Racedepartment community. Thank you!

Best,
Hoernle