83543 KB-1 Forklift Mast Roller Bearing MG 307 FFWU

Forklift Mast Roller Bearing 83543 KB-1 / MG 307 FFWU

The 83543 KB-1 mast bearing is a forklift mast roller bearing — the sealed ball bearing assembly that mounts on the mast channel roller pins and guides the inner mast channel as it extends and retracts through the outer channel during lifting and lowering. Mast roller bearings carry the full side-load and forward-moment generated by the load on the forks, and a worn, seized, or rough-running mast roller bearing produces noise during lifting, jerky mast movement, and accelerated wear on the mast channel rail surfaces. When a mast roller bearing fails completely, the mast channel can lock or bind, preventing the forklift from lifting or lowering loads.

Manufactured to the 83543 KB-1 / MG 307 FFWU specification, this mast roller bearing features a sealed ball bearing design with a heavy-gauge outer race that serves as the rolling surface against the mast channel. The FFWU designation indicates the seal type and bearing clearance specification. For mast roller pins and channel components, browse our relevant replacement parts.

Technical Specifications

• SKU / PN: 83543 KB-1 / MG 307 FFWU
• Type: Mast roller bearing, sealed ball bearing
• Designation: MG 307 FFWU

Compatible Equipment

Each 83543 KB-1 mast bearing ships individually. Verify the bearing dimensions against the removed roller. For mast specifications, consult Baldwin Filters. Kingstream stocks mast roller bearings — worldwide shipping with online tracking.