Designed for heavy-haul freight trucks, our Class D narrow bearing adapter meets AAR M924 standards and M1003-A16 manufacturing specifications.
Precision-cast from pearlitic malleable iron, it ensures secure load transfer between axle bearings and side frames under 80k lbs dynamic loads. Our Class D narrow bearing adapter is an important component for freight truck systems, specifically designed to interface between axle bearings and side frames in AAR Type N trucks. Manufactured under strict M1003-A16 protocols, it transforms vertical loads up to 80k lbs into stable rotational motion while preventing bearing misalignment.
Key Parameter | Technical Value | Verification Standard |
Axle Journal Size | 5½" × 10" | - |
Base Material | ASTM A220 Grade 50005 | Spectrometer Analysis |
Hardness (Body) | 179-228 HB | Brinell Test |
Surface Finish | Ra ≤ 3.2 μm (AA) | Surface Profilometer |
Weight | 18.2 kg ±0.5% | Standard Scale |
· Zero-Failure Compatibility: Maintains ±0.005" dimensional tolerances across all critical interfaces - exceeding AAR M924 Section 6 requirements.
· Shock-Load Resilience: Pearlitic iron microstructure absorbs 300% more impact energy than standard cast steel (ASTM A148).
· Corrosion Defense System: Triple-protection: Shot blasting (SA2.5) + zinc phosphate coating + epoxy sealant.
