S3M Black Rubber Synchronous Belt is a closed loop timing belt designed for precise, reliable motion in small machines. With a 3 mm pitch (S3M) and a width of 10 mm, this belt is ideal for 3D printers and other compact drive systems that use S3M pulleys. The circumference range for this product is 123 to 396 mm, and it is offered as model S3M123, with width 10 mm. Key benefits Precise timing and synchronized motion: the S3M pitch ensures accurate belt engagement with matching pulleys, reducing slip and maintaining repeatable positioning. Durable, low stretch construction: black rubber belt material provides wear resistance for longer service life in typical 3D printer and small machine environments. Closed loop for reliable tension: a ring design preserves consistent belt length and tension, improving drive stability over time. Easy integration with existing systems: designed to fit standard S3M pulley setups common in 3D printers and similar equipment. Versatile for compact applications: suitable for X and Y axis drives in 3D printers, as well as small CNC, laser, and robotics projects that require a 3 mm pitch belt. Key attributes Functionality: timing belt, synchronous belt, closed loop Pitch: S3M (3 mm) Width: 10 mm Material: black rubber Belt circumference range: 123–396 mm Model: S3M123 Compatibility: intended for S3M pulley systems used in 3D printers and related small machinery Compatibility and suitability Works with S3M pitch pulley systems commonly used in 3D printers and other compact drive assemblies. Suitable for replacement in X or Y axis drives, gantries, and similar motion systems that require a 3 mm pitch belt. Applications and use cases 3D printer gantry replacement: upgrade or the X or Y axis timing belt to maintain precise and repeatable layer alignment. Small CNC router or laser cutter drive: use in drives that require a 3 mm pitch, 10 mm wide timing belt to ensure synchronized movement. Robotics and automation projects: implement in compact robotic arms or mobile platforms requiring accurate belt drive with minimal slip. Installation and maintenance tips Verify belt length and circumference against pulley arrangement to ensure proper fit within the 123–396 mm range. Check pulleys for wear and alignment; misaligned pulleys can increase wear and reduce belt life. Apply appropriate tension per equipment guidelines; avoid over tightening to prevent premature tooth wear. Inspect belt periodically for cracks, glazing, or tooth damage and if signs of wear appear. This S3M123 belt combines the practical attributes of a 3 mm pitch, 10 mm wide, black rubber synchronous belt in a closed loop design, offering reliable timing and compatibility for 3D printers and related small drive systems.