V Groove Pulleys for Width Belts Designed for PU round belts and available in outer diameters from 20 mm to 80 mm to fit a range of applications. Grooved width is optimized for belts with a width of 6 mm, ensuring compatibility with common belt profiles. Made from aluminum alloy and CNC machined for smooth transmission, accuracy, and durability. Easy and secure installation with fixing grub screws included; CNC machined finish provides a precise, stable fit and minimizes belt slippage. Use scenarios In automation and small conveyors that use 6 mm width PU belts, these pulleys provide reliable belt drive with configurable pulley sizes. In compact machinery or DIY projects that require a range of pulley diameters (20 mm to 80 mm) to tune speed and torque. In robotics, packing lines, and general machinery where secure installation and precise motion transfer are needed with a 6 mm belt fit.