Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When your CNC router, 3D printer, or robotics project demands repeatable, slip-free linear motion, a mismatched or undersized pulley becomes the weakest link in the entire drive system. These 2GT drive pulleys with a stepped hub are engineered for makers, automation engineers, and machine builders who need a reliable, drop-in timing pulley that mates cleanly with standard 6mm GT2 belts.
Each pulley is machined from aluminum alloy with a natural or anodized finish, featuring a stepped (flanged) hub design that keeps the belt tracking true under load. Tooth counts range from 16 to 100 teeth, and bore diameters span 4mm to 25mm (approximately 0.16 in to 0.98 in), covering the most common motor shaft sizes used in hobby and light-industrial automation. Two hub styles are available: K-type (set-screw clamping) and BF-type (flange-bore clamping), so you can match your shaft retention method without adapters.
Typical use cases include X/Y axis drives on desktop CNC routers, extruder and Z-axis drives on FDM 3D printers, and belt-driven linear actuators in pick-and-place or conveyor automation. Long-tail applications include RepRap-style printer upgrades, laser engraver gantry drives, and educational robotics platforms requiring GT2-compatible 2GT pulleys with stepped flanges.
Available from 16 to 100 teeth, letting you dial in the exact gear ratio needed for your axis speed and torque requirements without custom machining.
Bore sizes from 4mm to 25mm (≈0.16–0.98 in) cover NEMA 17, NEMA 23, and many servo motor shaft diameters straight out of the box.
The integrated step flange keeps the 6mm belt centered on the pulley face, reducing edge wear and preventing belt walk during continuous operation.
K-type uses a radial set screw for quick shaft clamping; BF-type uses a flange-bore interface for higher torque retention — choose the style that suits your assembly.
Machined aluminum body keeps rotating mass low, reducing motor load and improving dynamic response in high-acceleration motion profiles.
Tooth profile conforms to the GT2 / 2GT 2mm pitch standard, ensuring smooth meshing with compatible belts and minimizing backlash in positioning applications.
| Belt Pitch | 2mm (GT2 / 2GT) |
|---|---|
| Belt Width | 6mm |
| Tooth Count | 16 – 100 teeth (see variant options) |
| Bore Diameter | 4mm – 25mm (see variant options) |
| Hub Style | K-type (set screw) / BF-type (flange bore) — see variant options |
| Material | Aluminum alloy |
| Finish | See variant options |
| Flange Type | Stepped (integrated belt guide flange) |
| Outer Diameter | See variant options |
| Hub Length | See variant options |
| Quantity per Order | 1 piece (default); bulk options available — see variant options |
Tooth count determines your drive ratio and linear speed per motor revolution. Divide the desired linear travel per revolution by the belt pitch (2mm) to get the required tooth count. For example, 80mm travel per revolution ÷ 2mm pitch = 40-tooth pulley. Pair with a larger driven pulley to reduce speed and increase torque, or use equal pulleys for a 1:1 ratio.
K-type pulleys use one or two radial set screws that press against the motor shaft — fast to install and suitable for most hobby and light-duty applications. BF-type pulleys use a flanged bore interface that distributes clamping force more evenly around the shaft circumference, making them better suited for higher torque loads or applications where the set screw might loosen under vibration.
Use a digital caliper to measure the outer diameter of your motor shaft at the point where the pulley will sit. Common sizes include 5mm (NEMA 17 standard), 6.35mm (1/4 inch, common on stepper and DC motors), 8mm (NEMA 23 standard), and 10mm or larger for servo motors. Select the bore that matches your shaft OD exactly — a loose fit will cause runout and belt skip.
Yes. These pulleys conform to the GT2 / 2GT 2mm pitch tooth profile and are designed for 6mm-wide GT2 timing belts. They are not compatible with T2.5, T5, HTD, or other belt profiles. Always verify both pitch and belt width before ordering.
The integrated step flange on each side of the pulley face acts as a physical guide that keeps the belt centered during operation. This significantly reduces the risk of belt walk or derailment, especially on long unsupported belt spans or in applications with lateral vibration. For best results, ensure the pulley is aligned perpendicular to the belt path.
Yes — these are among the most common applications. For 3D printers, 16-tooth and 20-tooth pulleys are typical for X/Y axis drives paired with NEMA 17 motors (5mm bore). For CNC routers, larger tooth counts (30–60 teeth) are often used on driven axes to achieve higher linear speed. Confirm your existing belt pitch is 2mm GT2 before replacing pulleys.
Verify four things: (1) belt pitch — must be 2mm GT2/2GT; (2) belt width — must be 6mm; (3) bore diameter — must match your shaft OD; (4) hub style — K-type for set-screw retention, BF-type for flange-bore retention. Also confirm the tooth count gives you the desired drive ratio when paired with your driven pulley or idler.
