Bomag 05521830 Supporting Disc

The Bomag 05521830 Supporting Disc is a genuine OEM component designed for an exceptionally broad range of Bomag rollers, including single drum rollers such as the BW 211 D-5 and BW 177 D-50, tandem rollers including the BW 120 AD-5 and BW 138 AD-5, walk-behind and light rollers such as the BW 75 S and BW 90 S, cold milling machines including the BM 2000/75 and BM 2500/75, and recycler/stabilizer models including the MPH 121, MPH 125, and MPH 600. Sourced directly from Bomag, this supporting disc matches the original part in every dimension and material specification. Confirm your model against the fitment list to ensure part number 05521830 is the correct match for your machine before ordering.

Key Features

• Genuine OEM Construction — manufactured to Bomag's original tolerances, ensuring the disc seats and bears load exactly as the original component was engineered to do
• Direct Drop-In Replacement — this supporting disc retains the original mounting interface and dimensions, slotting into place without rework or adaptation
• Broad Bomag Fitment — compatible with a wide range of BW-series single drum rollers, tandem rollers, and walk-behind rollers, as well as select BM-series cold milling machines and MPH-series recycler/stabilizers, including models such as the BW 211 D-5, BW 177 PDH-50, BW 124 DH-5, BW 138 AD-5, BW 100 AD-5, BW 75 S, BM 2500/75, and MPH 600
• Structural Integrity Under Load — a worn or cracked supporting disc can allow shaft or bearing misalignment, leading to accelerated wear on adjacent components; replacing it promptly protects the surrounding drivetrain or compaction assembly
• Long-Term Durability — OEM material grade ensures the disc resists the cyclic mechanical stress and vibration loads characteristic of compaction and milling equipment

A supporting disc is a precision-machined plate or disc-shaped component that provides a stable bearing or load-distribution surface between rotating or sliding assemblies within the machine. It holds adjacent components in correct axial or radial alignment, absorbing mechanical loads and preventing direct metal-to-metal contact that would accelerate wear. When a supporting disc becomes worn, cracked, or deformed, it can no longer maintain proper component spacing, which leads to vibration, premature bearing or seal failure, and reduced compaction or milling performance across the machine's operating cycle.

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.