Multiquip 12779 Bearing, 85MM x 130MM, Flanged

The Multiquip 12779 is a genuine OEM Bearing, 85MM x 130MM, Flanged designed for Whiteman and hydraulic ride-on power trowel models including the HTX, STX, HHN, MD80, and MD105 series. As a direct OEM replacement, this bearing meets Multiquip's original design specifications, ensuring the component installs correctly without modification to mounting surfaces or housings. Fitment covers a broad range of hydrostatic and mechanical ride-on trowel configurations, including HTXD6i, STXD6i, HTX44K4, HTX44K5, STX55Y6, STX55J6, HTX6H, STX6H, HHN34TVD, HHN31V, MD80, and MD105, among others. Sourced directly from Multiquip, part number 12779 is the correct replacement to keep your trowel operating at full capacity.

Key Features

• OEM-Grade Precision Tolerancing — Manufactured to Multiquip's original dimensional specifications for an 85MM x 130MM flanged bearing, ensuring correct load distribution and rotational accuracy in ride-on trowel drive systems.
• Flanged Housing for Secure Positioning — The integrated flange locks the bearing in place against its mounting face, preventing axial migration during high-cycle troweling operations.
• Broad Ride-On Trowel Compatibility — Fits a wide range of Whiteman and hydraulic ride-on power trowels across the HTX, STX, HHN, and MD series, including both diesel and gas-powered configurations.
• Sustains Blade Rotor Performance — A properly functioning bearing at this position maintains smooth, consistent rotor rotation; a worn bearing causes vibration, uneven blade pressure, and accelerated drivetrain wear.
• Genuine OEM Part — Part number 12779 is sourced directly from Multiquip, confirming authenticity and traceability for fleet maintenance records and equipment service documentation.

A flanged bearing of this size serves as a critical rotational support component within the trowel's rotor or drive assembly, carrying both radial and axial loads generated during finishing passes on concrete slabs. The flange face provides a positive register against the housing, keeping the bearing precisely located under the dynamic loads of trowel blade rotation. When this bearing wears or fails, operators typically notice increased vibration, noise from the rotor assembly, and irregular blade pitch behavior — all of which compromise the quality of the finished concrete surface and can lead to further mechanical damage if not addressed promptly.

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.