Product Overview — Part 20891618
The 20891618 is a precision-manufactured Vibration Dampers component. The 20891618 anti-vibration mount is engineered for compactor machinery vibration isolation systems. This bonded rubber-to-metal assembly handles the demanding vibratory loads specific to soil and asphalt compaction equipment, where the excitation frequency and amplitude are significantly higher than in conventional excavators or dozers. The rubber compound is formulated for dynamic fatigue resistance, maintaining stiffness characteristics within ±10% of nominal values through the design life of the component. Static to dynamic stiffness ratio is controlled to provide predictable vibration isolation performance across the compactor's operating frequency range. Related BOMAG vibration damper components include 3115 2472 00 and 3115 1926 02 which are purpose-designed for BOMAG BW series compactor applications.
Technical Specifications
| Property | Value | Standard |
|---|---|---|
| Part Number | 20891618 | OEM Specification |
| Hardness | 45–70 Shore A (application specific) | ISO 48-4 / ASTM D2240 |
| Tensile Strength | ≥ 16 MPa | ISO 37 / ASTM D412 |
| Elongation at Break | ≥ 300% | ISO 37 / ASTM D412 |
| Compression Set | ≤ 25% (22h/70°C) | ISO 815-1 / ASTM D395 |
| Temperature Range | −40°C to +90°C | Operational limits |
| Ozone Resistance | No cracking 168h | ISO 1431-1 |
| Fire Safety | EN 45545-2 HL2/HL3 available | EN 45545-2:2013 |
| Fatigue Life | > 1,000,000 cycles | Dynamic fatigue protocol |
Applications
Compactor anti-vibration mounting systems; vibratory roller cab isolation; road construction equipment vibration control.
Our technical team can assess suitability for other equipment types. Contact us with the make, model, and serial number for a precise cross-reference confirmation.
Material & Quality Standards
- Base Polymer: Natural Rubber (NR) or NR/SBR blend — excellent resilience and fatigue resistance
- Reinforcing Fillers: High-structure carbon black for controlled stiffness and wear resistance
- Protection Additives: Anti-ozonant wax and chemical antioxidant for extended outdoor service life
- Bonding System: Chemically bonded rubber-to-metal interface exceeding bulk rubber strength
- EN 45545-2 Option: Halogen-free flame retardant meeting smoke toxicity requirements (on request)
Every batch produced under ISO 9001:2015 QMS with full material traceability. Certificate of Conformance and material test reports available upon request.
Installation Guidelines
- Inspect on arrival: Verify part number 20891618. Check for transit damage — reject any non-conforming component.
- Clean mating surfaces: Remove all rust, old rubber fragments, grease, and paint before installation.
- Align correctly: Follow assembly drawing orientation. Incorrect orientation may cause premature failure.
- Torque fasteners: Use calibrated torque wrench and cross-pattern tightening sequence per OEM specification.
- Post-install check: Inspect for correct seating. Run equipment at low speed to verify no abnormal noise or vibration.