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 automated motion system demands repeatable, slip-free power transfer, a mismatched or worn pulley becomes the weakest link in the entire drive train. Engineers and makers who rely on synchronous belt systems need a pulley that holds tight tolerances across every cycle. These 5M timing belt pulleys are designed for exactly that — delivering consistent tooth engagement and zero-slip performance across a wide range of machine configurations.
Each pulley is machined from aluminum alloy with a natural or anodized finish, featuring a 5mm pitch (5M) tooth profile. The tooth count ranges from 15T to 25T, belt widths span 15mm, 20mm, and 25mm (approximately 0.59 in, 0.79 in, and 0.98 in), and bore sizes cover 5×4.5mm, 6×5mm, 6×5.5mm, 8×7mm, 8×7.5mm, and 10×9mm to accommodate common stepper and servo motor shaft diameters.
Typical use cases include CNC routing machines requiring precise X/Y axis positioning, desktop 3D printers using belt-driven Cartesian or CoreXY kinematics, and DIY automation projects such as pick-and-place systems, laser engravers, and linear actuators where synchronous belt drive pulleys with a 5mm pitch are the standard choice.
| Belt Standard | 5M (5mm pitch synchronous) |
|---|---|
| Tooth Count Options | 15T, 18T, 20T, 24T, 25T |
| Belt Width Options | 15mm / 20mm / 25mm (approx. 0.59 / 0.79 / 0.98 in) |
| Bore Size Options | 5×4.5mm, 6×5mm, 6×5.5mm, 8×7mm, 8×7.5mm, 10×9mm |
| Material | Aluminum alloy |
| Finish | See variant options |
| Flange | Flanged (standard for 5M pulleys) |
| Pack Quantity | 1 / 2 / 3 / 5 pcs (select above) |
| Compatible Belt Type | 5M open-end or closed-loop timing belt |
| Typical Applications | CNC routers, 3D printers, laser engravers, linear actuators, step motor drives |
The tooth count determines your drive ratio. A smaller pulley (e.g., 15T) on the motor paired with a larger pulley on the driven shaft reduces speed and increases torque. A matched pair (same tooth count on both ends) gives a 1:1 ratio. Calculate your required ratio based on motor RPM and desired axis speed, then select accordingly. For most desktop CNC and 3D printer builds, 20T is a common starting point.
Belt width affects load capacity and lateral stability. Wider belts (25mm) handle higher torque and are less prone to tracking off the pulley under side loads. For light-duty 3D printers, 15mm is typically sufficient. For CNC routers cutting harder materials or carrying heavier gantries, 20mm or 25mm is recommended. Always match the pulley width to your belt width.
Measure your motor shaft diameter with a caliper. The bore size listed (e.g., 6×5mm) refers to the bore diameter × keyway depth. Common NEMA 17 stepper shafts are 5mm diameter; NEMA 23 shafts are typically 6.35mm or 8mm. Select the bore option that matches your shaft diameter. If your shaft is metric and falls between listed sizes, contact us to confirm before ordering.
Yes. The aluminum alloy construction provides a good strength-to-weight ratio suitable for continuous-duty CNC routing, 3D printing, and similar applications. The tooth profile is machined to engage 5M belts accurately, minimizing tooth wear under normal operating loads. For very high-torque industrial applications, verify load ratings against your system requirements.
Aluminum alloy naturally forms a thin oxide layer that provides moderate corrosion resistance in typical indoor workshop environments. For humid or outdoor environments, an anodized finish (where available) offers additional protection. Avoid prolonged exposure to strong acids or alkalis. Regular inspection and light lubrication of the belt system will extend service life.
These pulleys are designed to the standard 5M tooth profile (5mm pitch, trapezoidal or curvilinear depending on belt type). They are compatible with most commercially available 5M open-end and closed-loop timing belts. Confirm that your belt uses the 5M pitch standard — not GT2, HTD, or other profiles — before purchasing. If you are unsure, check your belt's part number or measure the tooth pitch directly.
Installation typically requires a hex key (Allen wrench) to tighten the set screw that locks the pulley onto the motor shaft. Ensure the set screw aligns with the keyway or flat on your shaft for a secure fit. No specialized machinery is needed for standard installations. For press-fit or interference-fit applications, a small arbor press may be helpful.
