Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When a slipping or mismatched pulley throws off your CNC router, 3D printer, or automation rig, the entire project stalls. Engineers, makers, and machine builders who need reliable, repeatable motion need a synchronous wheel they can count on — one that seats firmly on the shaft and meshes cleanly with standard XL belts every time.
These XL timing belt pulleys feature a 5.08mm (0.200 in) pitch profile machined to XL belt standard, with a tooth width of 11mm (0.43 in). Available in tooth counts from 10T to 100T and bore diameters from 4mm (0.16 in) to 25mm (0.98 in), each pulley is manufactured from aluminum alloy with a natural anodized or clear finish for corrosion resistance and dimensional stability.
Typical applications include XL timing belt pulley for CNC router axis drives, 3D printer extruder and motion systems, robotic arm joint actuators, conveyor indexing mechanisms, and stepper motor synchronous drive assemblies — anywhere precise, slip-free power transmission is required.
Machined to XL belt profile specification for accurate mesh with any standard XL timing belt, minimizing backlash and tooth skip under load.
Seventeen bore size options from 4mm to 25mm (including 6.35mm and 12.7mm imperial equivalents) cover most stepper, servo, and motor shaft diameters.
Twenty tooth-count options let you dial in your exact gear ratio — from compact 10T drive pulleys to large 100T driven wheels for high-torque, low-speed applications.
Lightweight yet rigid aluminum body resists corrosion and maintains dimensional accuracy across temperature cycles, suitable for indoor and light industrial environments.
The 11mm (0.43 in) tooth width provides solid belt engagement surface area, reducing edge loading and extending belt service life in continuous-duty applications.
Positive tooth engagement eliminates the speed variation and slip associated with friction drives, delivering consistent positioning accuracy for CNC and robotics use.
| Belt Profile | XL (Extra Light) |
|---|---|
| Pitch | 5.08mm (0.200 in) |
| Tooth Width | 11mm (0.43 in) |
| Number of Teeth | 10T – 100T (see variant options) |
| Bore Diameter | 4mm – 25mm (see variant options) |
| Material | Aluminum Alloy |
| Finish | See variant options |
| Flange | See variant options |
| Quantity per Order | 1 piece |
| Compatible Belt | XL profile timing belt, 5.08mm pitch |
The tooth count determines your drive ratio. Divide the driven pulley teeth by the drive pulley teeth to get the ratio. For example, a 20T drive and 40T driven pulley gives a 2:1 reduction — halving speed and doubling torque. For CNC and 3D printer motion axes, 20T is a common drive pulley choice paired with a matching belt pitch.
Measure your motor or shaft diameter precisely with calipers. Common stepper motor shaft sizes are 5mm, 6.35mm (1/4"), and 8mm. Servo and DC motor shafts often run 6mm, 8mm, or 10mm. Select the bore that matches your shaft — a bore that is too large will require a bushing or set screw modification.
Yes. These pulleys are machined to the XL belt standard (5.08mm / 0.200" pitch), so they are compatible with any XL profile timing belt of the same pitch regardless of brand. Ensure the belt width does not exceed the pulley tooth width of 11mm for proper tracking.
Aluminum alloy pulleys offer an excellent strength-to-weight ratio suitable for most CNC, 3D printing, and light industrial automation applications. For very high torque or heavy industrial duty cycles, steel pulleys may be preferred. For typical maker and engineering builds, aluminum provides sufficient strength while keeping rotating mass low.
Aluminum alloy naturally forms a protective oxide layer that resists corrosion in typical indoor workshop and light industrial environments. They are not recommended for continuous exposure to salt spray, strong acids, or highly humid outdoor conditions without additional protective coating.
Yes. You can use any two pulleys from this range as a matched drive pair. Simply select the tooth counts that give your desired speed ratio and ensure both pulleys have bore diameters that fit their respective shafts. Using the same pitch on both sides is required for proper belt engagement.
The number after "XL" indicates the tooth count. XL10T has 10 teeth and a smaller outer diameter, suitable as a compact drive pulley. XL20T has 20 teeth and a larger outer diameter, providing more belt wrap and torque capacity. Larger tooth counts also reduce belt stress per tooth at equivalent loads.
