Multiquip 13277 Boss Bearing

The Multiquip 13277 Boss Bearing is a genuine OEM component designed for WM120PM and WM120SM Whiteman plaster and mortar mixers. As a direct OEM replacement, the part meets the original engineering specifications set for this mixer series, ensuring the drum and drive assembly operate as intended. DHS Equipment sources this part directly through authorized Multiquip channels, so you can order with confidence knowing you are getting the correct bearing for your machine.

Key Features

• OEM-Grade Bearing Tolerances — Manufactured to the original dimensional and load-rating specifications for the boss assembly, maintaining proper rotational alignment under the continuous stress of mixer operation.
• Drop-In Replacement — Engineered to seat directly into the boss housing on WM120PM and WM120SM mixers, matching the original mounting interface without reworking or adapting surrounding components.
• Confirmed Fitment for WM120 Series — Verified for Whiteman WM120PM and WM120SM mortar and plaster mixer models, eliminating guesswork when ordering a bearing replacement for this platform.
• Sustained Drum Drive Performance — A correctly seated boss bearing keeps the drum rotating smoothly and evenly; a worn or failed bearing introduces wobble, uneven mixing, and accelerated wear on adjacent drive components.

The boss bearing is a critical rotating component within the drum drive assembly of a mortar or plaster mixer. It supports the boss — the central hub through which rotational force is transferred to the mixing drum — allowing it to spin freely and concentrically under load. When this bearing wears, operators typically notice increased vibration, irregular drum rotation, or unusual noise during mixing cycles. Left unaddressed, a failed boss bearing places additional stress on the drum shaft and surrounding housing, leading to more extensive and costly repairs.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.