Arrowmax AM-910038 AM Medius Belt S3M 348mm Rubber White (2)  [AM-910038]

Medius S3M 348mm timing belt

The Arrowmax AM-910038 AM Medius belt is an RC-scale S3M profile timing belt supplied as a pair, intended for use in belt-driven scale models and hobby drivetrains. The set contains 2 pcs of 348mm length belts in white rubber construction, designed to engage S3M pulleys commonly used in model drivetrains and transmission setups.

This belt serves primarily as a drivetrain timing and power-transmission component: it maintains synchronized rotation between pulleys, allows adjustable tensioning for setup tuning, and offers a visibly white finish for inspections and alignment checks. Use it where the S3M tooth profile and a 348mm loop length match the pulley spacing on your model.

Installation is straightforward for typical RC belt systems: route the belt around matching S3M pulleys, set approximate tension, then run brief low-speed checks to confirm tracking and load distribution before full-speed operation. For tuning, small tension changes affect drivetrain compliance and can influence handling feedback on belt-driven layouts; aim for even tension across the belt span and avoid sharp edge contact with pulley flanges.

As a spare or setup part, this two-piece Medius belt set is a practical option for maintaining consistent timing and easy replacement in S3M-based RC drivetrains where a 348mm belt loop is required.