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When a slipping or mismatched pulley throws off your print accuracy or CNC repeatability, the entire project suffers. Engineers, makers, and repair technicians who rely on GT2 belt-driven motion systems need a drop-in 15-tooth synchronous wheel that holds tight tolerances without play. This 15T 2GT timing pulley is designed for exactly that — delivering consistent, backlash-resistant motion in demanding automated systems.
Each pulley features a 15-tooth GT2 (2mm pitch) tooth profile machined to mesh cleanly with standard GT2 timing belts. Available bore sizes span 3mm, 3.175mm (1/8"), 4mm, and 5mm, with slot widths of 7mm (fits 6mm-wide belts) and 11mm (fits 10mm-wide belts). The compact wheel diameter is typically 9–12mm OD depending on bore, keeping the footprint minimal for tight build volumes.
Typical use cases include FDM 3D printer X/Y axis drives (compatible with popular CoreXY and Cartesian platforms), desktop CNC router belt drives, and lightweight robotic arm joint actuators — anywhere a reliable 2GT synchronous wheel is needed for repeatable positioning.
The 2mm-pitch tooth geometry meshes with GT2 belts for smooth, low-noise power transmission with minimal backlash — critical for accurate layer positioning in 3D printing.
Choose from 3mm, 3.175mm (1/8"), 4mm, or 5mm bore to match your stepper motor shaft directly — no adapters, no shimming required.
The 7mm slot width accommodates standard 6mm GT2 belts; the 11mm slot width fits wider 10mm GT2 belts for higher-torque or heavier-duty drive systems.
Machined from aluminum alloy for a balance of light weight and structural rigidity, resisting deformation under continuous belt tension across extended print runs.
Fits Ender, Voron, RatRig, and other GT2-belt-driven 3D printer platforms, as well as desktop CNC routers and robotic actuators using 2GT synchronous drive systems.
Each pulley ships ready to mount — bore is finished to tolerance for a secure shaft fit, and the set-screw flat (where applicable) ensures positive rotational lock without slippage.
| Number of Teeth | 15T |
|---|---|
| Belt Profile | GT2 / 2GT (2mm pitch) |
| Bore Diameter | 3mm / 3.175mm / 4mm / 5mm (see variant options) |
| Slot Width | 7mm (fits 6mm belt) / 11mm (fits 10mm belt) |
| Outer Diameter | See variant options |
| Material | Aluminum alloy |
| Finish | Natural / anodized (see variant options) |
| Set Screw | Included (M3, hex socket) |
| Compatible Belt Width | 6mm (7mm slot) / 10mm (11mm slot) |
| Weight | See variant options |
Measure your stepper motor output shaft diameter with a caliper. Common sizes are 5mm (NEMA 17 standard), 4mm, 3.175mm (1/8" imperial), and 3mm. Select the bore that matches your shaft exactly — a loose bore will cause slippage and positioning errors.
The slot width refers to the usable belt-contact width of the pulley. The 7mm slot fits standard 6mm-wide GT2 belts (the most common size for desktop 3D printers). The 11mm slot fits wider 10mm GT2 belts, which are used in higher-torque or heavier-carriage systems. Match the slot width to your belt width for proper tracking.
Yes. GT2 and 2GT are functionally the same 2mm-pitch open-loop belt standard. This 15T pulley meshes correctly with any GT2 / 2GT timing belt regardless of brand, as long as the belt width matches the slot width you select.
This pulley is compatible with any GT2-belt-driven 3D printer that uses a matching bore shaft, including Creality Ender series, Voron 2.4, Voron Trident, RatRig V-Core, and many other CoreXY and Cartesian platforms. Always verify the bore size and belt width match your specific machine's specifications.
The aluminum alloy construction provides sufficient rigidity for typical desktop 3D printer and light CNC belt tensions (generally 5–15N pre-tension range). The set screw locks the pulley to the shaft to prevent rotational slip. For heavy industrial loads, consult the torque rating of your specific motor and belt system.
Yes, an M3 hex socket set screw is included. You will need a 1.5mm or 2mm hex (Allen) key to tighten it. Ensure the flat on your motor shaft (if present) is aligned with the set screw for the most secure connection.
Absolutely. Any application using a GT2 / 2GT synchronous belt drive with a compatible shaft diameter can use this pulley — including desktop CNC routers, laser engravers, robotic joint actuators, and automated conveyor systems operating within the load limits of the GT2 belt standard.
