Tractors spring Assy

Crafted from high-grade alloy steel (52CrMnMoV equivalent) through precision casting and CNC machining, this rear axle spring seat ensures optimal load distribution and durability in commercial vehicle suspension systems. The manufacturing process begins with investment casting to achieve complex geometries (±0.2mm tolerance), followed by 5-axis CNC machining that refines critical mounting surfaces to ±0.05mm accuracy. A comprehensive heat treatment cycle—including normalizing at 900-920°C for grain refinement, annealing for stress relief, oil quenching at 850°C for hardness, and tempering at 540-600°C—delivers HRC 30-35 hardness with uniform microstructure, capable of supporting static loads up to 12,000 lbs and dynamic cyclic loads exceeding 500,000 cycles at 80% capacity.

Available in original cast finish or durable black baking varnish, surface treatments include SAE J444-compliant shot blasting for enhanced paint adhesion and optional electro-galvanizing (ISO 1461) for corrosion resistance in harsh environments. Certified under IATF 16949 standards, each spring seat undergoes rigorous quality checks: 150% overload testing, magnetic particle inspection for micro-cracks, and full CMM verification of bore alignment (±0.1mm positional accuracy). The design incorporates reinforced ribbing (10mm thickness) and chamfered edges to prevent stress concentration, compatible with SAE J429 Grade 8 fasteners and standard spring eye bushings.