Product description Key benefits Accurate, slip-free power transmission: Designed for seamless matching with timing belts to provide stable, efficient motion and reduced downtime. Secure belt retention: Double flange construction keeps the belt aligned and prevents tracking issues during operation. Durable construction with vibration damping: Made of high quality Aluminium Alloy with fine workmanship, offering buffering and shock absorption capabilities and strong mechanical performance. Easy mounting and compatibility: Multiple bore options and a simple fixed mode make installation straightforward and adaptable to common shafts and setups. Specifications Flange: double Material: Aluminium Alloy Type: 20 3GT 9 BF Pitch: m Teeth Number: 20 Teeth Outside Diameter (OD): 18.3m Bore: 5 / 6.35 / 8 mm Fixed mode: 2 × M4 Fit for Belt Width: 9 mm Performance and application notes Precision tooth profile and accurate machining ensure tight, seamless engagement with 3GT timing belts for minimal backlash and efficient power transfer. Double-flange design reduces lateral belt movement and improves long-term belt life. Multiple bore sizes (5, 6.35, 8 mm) support common shaft diameters; mounting via two M4 screws provides a secure connection. Typical use scenarios 3D printers and CNC machines: Reliable drive pulley for X/Y axis timing-belt systems where precise, repeatable motion is required. Light industrial automation and robotics: Smooth, efficient power transmission for small actuators and positioning systems using 9 mm 3GT belts. DIY and prototyping projects: Easy-to-install pulley for hobby machines, conveyor prototypes, or any application needing a 20-tooth 3GT pulley with double flanges. Notes for buyers Confirm belt width (9 mm) and shaft bore size (5 / 6.35 / 8 mm) match your system prior to purchase. Fixed using two M4 fasteners; ensure correct torque and alignment during installation to maintain performance.