https://www.youtube.com/shorts/31zzYq1GHe0

Heavily inspired by the belt extruder developed by Jon Schone from Proper Printing, this belt extruder has been designed to print very flexible TPU and TPE filament at high speeds.
I thought I would finally upload to Thingiverse because of how useful it has turned out to be at work - for example: We currently use about 4 of these extruders at my office to print 60A Recreus filament on 0.8mm nozzle CR-10 Max printers, reaching speeds of up to 50mm/s.

Some extra hardware is required, but most of the components can be printed - including all gears and pulleys. I have included a listed bill of materials below to summarise print material, resolution, and hardware purchase links.

Printed Parts:
1x....Stepper Drive Gear.......................Ideally PC or ABS at 0.2mm nozzle
2x....Belt Drive Gear.............................PC, ABS, or PETG at 0.2mm nozzle
4x....Belt Extruder Pulley......................PC, ABS, PLA at 0.2mm nozzle
2x....Idler Pulley....................................PC, ABS, PLA at 0.2mm nozzle
1x....Stepper Plate................................PLA, PETG at 0.4mm nozzle
1x....Support Plate................................PLA, PETG at 0.4mm nozzle
1x....Front Plate....................................PLA, PETG at 0.4mm nozzle

Bed supports recommended for all parts

Hardware:
12x...683ZZ Double Shielded Ball Bearing 3x7x3mm https://www.amazon.co.uk/gp/product/B07FXXKZHG/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1
4x.....ZZ695 Double Shielded Ball Bearing 5x13x4mm https://www.amazon.co.uk/gp/product/B08X1ZHPW5/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
2x....110mm GT2 Closed Loop Timing Belt https://www.amazon.co.uk/gp/product/B09DGJG2VX/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
2x.....M5 x 35mm Countersunk Hex Socket Screw https://www.amazon.co.uk/gp/product/B09KMGKMYB/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1

6x.....M3 x 18mm Button Head/Socket machine screw
4x.....M3 x 14mm Button Head/Socket machine screw
6x.....M3 Nyloc Nut
2x.....M5 Nyloc Nut
4x.....M3 x 10mm countersunk machine screw
2x.....M3 x 6mm button head/socket machine machine screw
Above Fixings from a standard machine screw multipack from Amazon

1x.....Stepper motor heat sink (optional - our machines are on constantly so we have found this useful) https://www.amazon.co.uk/sourcing-map-Heatsink-Stepper-40x40x11mm-Black/dp/B08HMDGQ3J/

Assembly instructions in image 2

I've included the STEP file of the extruder, please feel free to modify and remix to your needs.