Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When your 3D printer skips steps or your CNC axis loses position, the culprit is often a worn or mismatched timing pulley. Makers, engineers, and repair technicians who demand repeatable accuracy need a pulley that fits correctly and holds its position under continuous load. These 2GT timing pulley gear wheels are engineered for exactly that — delivering consistent tooth engagement and smooth belt tracking on every print or cut.
Each pulley is machined from black-anodized aluminum alloy, combining low weight with solid rigidity. The 2GT (GT2) tooth profile is compatible with standard 2mm-pitch GT2 timing belts. Available in 16-tooth and 20-tooth configurations, with bore options of 5mm or 8mm, and a belt width of 6mm (16mm hub height). Overall outer diameter ranges from approximately 11–14mm depending on tooth count.
Typical use cases include FDM 3D printer X/Y axis drives (Ender, Prusa, Voron, and similar open-frame designs), desktop CNC router feed axes, laser engraver gantry systems, and custom robotics or automation builds requiring low-backlash linear motion.
| Tooth Profile | 2GT (GT2), 2mm pitch |
|---|---|
| Tooth Count | 16T or 20T (see variant options) |
| Bore Diameter | 5mm or 8mm (see variant options) |
| Belt Width | 6mm |
| Hub Height | 16mm |
| Outer Diameter | ~11.5mm (16T) / ~14.0mm (20T) |
| Material | Aluminum alloy |
| Finish | Black anodized |
| Retention | Set screw (grub screw) |
| Compatible Belt | GT2 / 2GT, 6mm width, 2mm pitch |
| Compatible Shaft | 5mm or 8mm diameter motor shaft |
| Weight | See variant options |
The tooth count determines your motion ratio. A 20-tooth pulley moves the belt farther per motor revolution than a 16-tooth pulley, resulting in faster axis travel but slightly lower torque. A 16-tooth pulley gives finer resolution per step and more torque. Most standard 3D printer builds (Ender 3, Prusa i3 variants) use 20T on the motor and an idler; choose 16T if you are tuning for higher resolution or matching an existing drive system.
Standard NEMA 17 stepper motors have a 5mm diameter output shaft. Select the 5mm bore variant for a direct fit. The 8mm bore variant is intended for larger motors or custom shaft adapters. Always verify your motor's shaft diameter before ordering.
Yes. The 2GT tooth profile is an open standard identical to the GT2 profile used by Gates, Filastruder, and most aftermarket belt suppliers. Any GT2 belt with 2mm pitch and 6mm width will mesh correctly with these pulleys.
Each pulley includes a set screw (grub screw) that clamps against the motor shaft. Use a 1.5mm or 2mm hex key to tighten the set screw firmly against the shaft flat (if present) or directly against the shaft surface. For added security on shafts without a flat, apply a small amount of thread-locking compound to the set screw before tightening.
Aluminum alloy pulleys are the industry standard for desktop 3D printers and light CNC machines. The material provides sufficient strength for the belt tension and cyclic loads typical of these applications. The black anodized surface adds hardness to the tooth flanks, reducing wear from belt contact over extended use.
The hard anodized finish provides corrosion resistance suitable for typical workshop conditions, including moderate humidity and dust exposure. For environments with direct water contact or chemical exposure, additional protective measures may be needed. Wipe the pulley clean periodically to prevent abrasive dust buildup in the tooth grooves.
For 6mm GT2 belts on 3D printer axes, a belt tension that produces a resonant frequency of approximately 100–130 Hz (measured with a smartphone app like Gates Carbon Drive or a tension meter) is a common starting point. Over-tensioning can increase bearing wear on the motor; under-tensioning causes layer shifting. Refer to your printer's documentation for the manufacturer-recommended tension value.
