Ball-Bearing Idler Arm (for 2mm Pitch GT2, 6mm Width Belt)

Belt tension and belt routing are key ingredients for a successful timing-belt linear-motion mechanism. As such, you can fasten this Fixed Tensioner Post—a ball-bearing idler arm—to any two 4mm holes spaced 16mm apart to get a pair of post-mounted bearings that keep your belt in the right path!

While capable of multiple use-cases for timing-belt guidance, this Post shines most when mounted near the drive pulley to help prevent unwanted slack from causing the belt to slip off the teeth of the pulley. And though it’s a fixed (static) mount, when it’s properly placed, it can ensure that slack generated in the belt system remains isolated from the drive pulley—allowing the drive pulley to do its job successfully.