Yokomo YOKZCS320 Precision 3.1 x 5 x 0.2mm Chassis Shim  [YOKZCS320]

Precision 3.1 x 5 x 0.2mm chassis shim for tight spacing

This is an RC-scale shim intended for precision spacing and tolerance adjustments on model car chassis. The listed dimension 3.1 x 5 x 0.2mm identifies the shim size and thickness used when matching parts for axial clearance or gear mesh corrections.

Common uses include dialing out axial play on shafts, setting bearing preload, and trimming the mesh between spur and pinion where very small thickness changes affect driveline feel. The shim works as a thin mechanical spacer so you can alter stack height without cutting or replacing components.

Fitting is straightforward: clean the mating surfaces, insert the shim at the chosen interface, then reassemble. Check free rotation and engagement after each change and add or remove individual shims until the desired clearance and drivetrain response is obtained.