Shim for National Crane 900

This shim, part number 201868, is a mechanical component used within the National Crane 900 crane assembly. It serves to adjust tolerances, compensate for clearances, and ensure the precise alignment of various mechanical parts. By filling gaps between mating surfaces, it allows for the uniform distribution of loads across the assembly.

This component is compatible with the National Crane 900 truck-mounted crane. It is used in applications where precise spacing is required to prevent friction, vibration, or misalignment of internal mechanisms such as bearings, gears, or shaft connections. The part is manufactured to specific thickness requirements to maintain the intended mechanical fitment of the crane systems.

Shims function as critical spacers in heavy machinery to manage the fit between stationary and moving parts. By providing the exact thickness needed to bridge gaps, they ensure that mechanical assemblies operate within their design specifications. Proper installation of these components prevents excessive play or binding, which is necessary for the mechanical integrity of the crane during lifting operations.