Tie Rod Spring for Auto Reset Shank

Engineered to deliver consistent reset force in demanding tillage operations, this tie rod spring is precision-cast from 52CrMnMoV alloy steel using investment casting (±0.15mm dimensional accuracy) and CNC-machined to ±0.03mm tolerance on critical bearing surfaces. The manufacturing process incorporates a full thermal cycle—normalizing (900-920°C), annealing, oil quenching (850°C), and tempering (540-600°C)—to achieve HRC 34-38 hardness with uniform microstructure, providing precise spring rates (150-220 N/mm) and fatigue resistance exceeding 500,000 cycles at 80% maximum load.

Available in original forged finish or black baking varnish, surface treatments include MIL-SPEC shot blasting (SAE J444) for optimal coating adhesion and optional Dacromet® coating for 2,000+ hours salt spray resistance. Certified under IATF 16949 standards, each spring undergoes rigorous testing: 200% overload validation, magnetic particle inspection for material integrity, and CMM verification of coil pitch consistency (±0.1mm). The design features a progressive winding geometry to maintain linear force characteristics throughout the 120mm stroke range.