GT1.5 (1.5 mm pitch) Timing Pulley – 21 and 26 Teeth – 6 and 9 mm Belt Width – 5 mm Bore

This is an accurate 3D model (exported as STEP) of a 1.5GT timing pulley with the following specifications:

• Pitch: 1.5 mm (GT1.5 / GT2-1.5 series)

• Number of teeth: 21 & 26

• Belt width: 6 mm and 9mm

• Bore: 5 mm (with flat on shaft, exactly as sold by RobotDigg)

• Flanged design (two flanges)

• Aluminum-style tooth profile (compatible with genuine GT1.5 6 mm belts)

The model is based on the original RobotDigg part #2230 (21-tooth version):
https://www.robotdigg.com/product/2230/1.5GT-pulley-21-or-26-tooth-1.5mm-pitch

Aliexpress option:
https://s.click.aliexpress.com/e/_c3jQcBGd

Perfect for:

• Voron MICROLITE and other small-format printers that use 1.5 mm pitch belts

• Custom motion systems requiring very compact belt drives

• Replacement or modification of stock RobotDigg pulleys

• Reverse-engineering or integration into your own assemblies

The STEP file is clean, fully solid, and ready for import into Fusion 360, SolidWorks, Onshape, FreeCAD, etc. No supports needed if you decide to 3D-print it (though the original part is machined aluminum).

Print settings recommendation (if printing):

• Material: ABS, or PC for best durability

• Nozzle size: 0.2mm

• 0.1 mm layer height

• 100 % infill

• Orient with flanges down on the bed