Package contents 1 x 20tooth pulley 1 x 60tooth pulley 1 x closed (endless) timing belt Key benefits Precise gear ratio: the 60tooth / 20tooth combination gives a 3:1 reduction, making it simple to convert speed to torque or to slow an output shaft while keeping motion synchronized. Synchronous power transmission: the closed timing belt and matched pulleys prevent slip and maintain accurate positional timing for driven systems. Simple replacement and integration: threepiece set includes both pulleys and the belt so you can a worn drive train or assemble a matched drive without mixing parts. Function and important attributes Function: transfers rotational motion and timing between two shafts with a fixed 3:1 ratio. Size specification: exact tooth counts are 20 and 60; confirm belt pitch and pulley bore dimensions for fitment before installation. Belt type: closed (endless) timing belt for continuous, synchronized operation. Compatibility: intended for systems that use 20tooth and 60tooth pulleys with a matching belt profile and pitch. Verify shaft diameters, pulley bores, and belt pitch/width to ensure proper fit. Performance: designed to maintain timed motion and reduce slippage versus friction drives. Performance depends on correct sizing, tensioning, and system load. Practical use scenarios Robotics and automation: use the set to reduce motor speed and increase torque for arm joints or wheel drives while keeping position control accurate. Prototyping and hobby projects: quick replacement or assembly in small mechanical prototypes, model machines, or hobby CNC/3D printer subsystems that require a 3:1 drive ratio. Small machinery and conveyors: drive applications where synchronized movement of two shafts is required and a closed timing belt is preferred for continuous operation. Installation tips Confirm belt pitch, width, and pulley bore size match your existing components before installation. Mount pulleys securely on shafts and align them on the same plane to prevent premature wear. Tension the closed belt appropriately for your application — too loose can cause skipping, too tight increases bearing load. Notes This listing specifies tooth counts and a closed timing belt only. Check the seller's detailed specifications for belt profile, material, bore sizes, and any modelspecific fitment information prior to .