Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When a skipped tooth or misaligned pulley ruins a print or throws off a CNC cut, the root cause is almost always a low-tolerance drive component. Makers, engineers, and 3D printer builders who demand repeatable, backlash-free motion need a GT2 timing belt pulley they can trust across thousands of cycles.
These GT2 timing belt pulleys are machined from aluminum alloy with a smooth anodized finish, available in 16-tooth (2GT-16T) and 20-tooth (2GT-20T) configurations. Belt width is 6mm (0.24 in), matching standard GT2 open-loop and closed-loop belts. Bore sizes range from 3mm to 8mm (0.12–0.31 in), with both with-hole (set-screw) and without-hole styles to suit different shaft retention methods.
Typical use cases include Cartesian and CoreXY 3D printer X/Y axis drives, DIY CNC router gantry systems, and lightweight robotics or automation projects requiring low-backlash GT2 belt drive pulleys for stepper motors.
Choose 16-tooth for higher torque and slower linear speed, or 20-tooth for faster travel — both use the same 2mm GT2 pitch for interchangeability.
Precisely machined flanges keep the GT2 belt tracking straight under load, reducing edge wear and maintaining consistent tension over time.
With-hole variants include a radial set-screw port for positive shaft locking; without-hole variants suit press-fit or keyed shaft applications.
Available in 3mm, 5mm, and 8mm bore diameters to fit a wide range of stepper motor and servo shaft sizes without adapters.
Lightweight yet rigid aluminum body keeps rotational inertia low — critical for fast direction changes in CoreXY and delta printer architectures.
The GT2 tooth profile delivers smooth, low-noise power transmission with minimal backlash, making these pulleys suitable for precision positioning applications in 3D printing and CNC routing.
| Belt Profile | GT2 (2mm pitch) |
|---|---|
| Tooth Count | 16T or 20T (see variant options) |
| Belt Width | 6mm (0.24 in) |
| Bore Diameter | 3mm / 5mm / 8mm (see variant options) |
| Style | With Hole (set-screw) / Without Hole (see variant options) |
| Material | Aluminum alloy |
| Finish | Anodized |
| Flange | Dual flange for belt retention |
| Outer Diameter (16T) | Approx. 10.2mm (0.40 in) |
| Outer Diameter (20T) | Approx. 12.7mm (0.50 in) |
| Hub Width | See variant options |
| Compatible Belt | GT2 6mm open/closed loop timing belt |
The tooth count determines the linear distance traveled per motor revolution. A 16-tooth pulley moves the belt approximately 32mm per revolution, while a 20-tooth pulley moves it 40mm. Use 16T for more torque and finer resolution, or 20T for faster travel speed with the same stepper motor.
Standard NEMA 17 stepper motors have a 5mm output shaft diameter. Select the 5mm bore variant. If your motor has a D-shaped shaft, choose the "With Hole" style so the set screw can lock against the flat.
"With Hole" pulleys have a radial set-screw port that lets you lock the pulley firmly to the motor shaft using an Allen key — ideal for most 3D printer and CNC applications. "Without Hole" pulleys are designed for press-fit, keyed, or bonded shaft installations where a set screw is not required.
Yes. These pulleys use the GT2 (2mm pitch) tooth profile and are compatible with any standard GT2 open-loop or closed-loop timing belt with 6mm width. They work with belts from common 3D printer suppliers and motion system kits.
For 3D printing and light CNC use, aluminum GT2 pulleys offer an excellent balance of weight and durability. The anodized surface resists wear under normal belt tension. Steel pulleys are typically only necessary in heavy industrial applications with very high belt loads or continuous high-speed operation beyond typical hobbyist use.
These are drive pulleys designed to mount on a motor shaft. For idler applications (free-spinning belt guides), you would typically use a smooth idler pulley or a toothed idler with a bearing insert. The "Without Hole" variant can be adapted with a bearing in some custom builds, but this is not the primary intended use.
Check your printer's motion system documentation for the belt pitch (should be GT2 / 2mm), belt width (6mm), and motor shaft diameter. Popular printers such as Creality Ender series, Voron 2.4, RatRig V-Core, and many others use GT2 6mm belts with NEMA 17 motors (5mm shaft). Confirm your specific model's BOM before ordering.
