V-Groove Aluminum Drive Pulley For V-Belt Pulleys Groove 10mm OD 40/50/60/80mm

Start with your shaft diameter — the bore must match or be slightly larger than your shaft so a set screw or keyway can secure it. Then choose the OD based on your desired speed ratio: a larger driven pulley relative to the driver pulley reduces output speed and increases torque. Use the variant selector to pick the OD × Bore combination that fits your build.

The 10mm groove width is designed for standard narrow V-belts with a matching top width. Common compatible profiles include belts in the 10mm (Z/3L) family. Always verify the belt's top width and angle against the pulley groove profile before ordering to ensure a snug, slip-free fit.

Aluminum alloy pulleys are well-suited for light-to-medium duty applications such as DIY automation, small conveyors, 3D printers, and educational machinery. For heavy industrial loads, high-torque drives, or continuous high-speed operation, a cast-iron or steel pulley may be more appropriate. If you are unsure, contact us to confirm suitability for your specific load and RPM requirements.

Aluminum naturally forms a thin oxide layer that protects against surface corrosion in typical workshop conditions. These pulleys are not recommended for submersion or prolonged exposure to harsh chemicals or saltwater environments. For outdoor or high-humidity applications, consider applying a light coat of protective spray after installation.

Most installations use a set screw through the hub to clamp the pulley onto the shaft. If your shaft has a keyway, you can also use a matching key for a more positive drive connection. Check the bore diameter of your selected variant and ensure your shaft and fastening method are compatible before assembly.

Yes — the compact OD options (40 mm and 50 mm) and small bore sizes (7 mm–12 mm) make these pulleys a practical choice for DIY CNC axis drives, extruder assemblies, and similar maker projects where a V-belt drive is preferred over a timing belt. Confirm the groove profile matches your belt before ordering.

The OD directly affects your drive ratio and belt speed. A smaller OD pulley on the driver shaft paired with a larger OD pulley on the driven shaft reduces output RPM and increases torque. The 80mm OD variant is heavier and provides more inertia, which can smooth out speed fluctuations in variable-load applications.