OEM Rear Axle Shaft Specifications, Metallurgy & Manufacturing Process
Emmbros Autocomp Limited is one of India's premier OEM manufacturers of heavy-duty rear axle shafts in Baddi, Himachal Pradesh. Engineered for high torsional yield strength and bending fatigue life, our full-floating, semi-floating, and flanged rear axle shafts are trusted by leading commercial truck, bus, utility vehicle, and agricultural tractor manufacturers including Tata Motors, Ashok Leyland, and Mahindra.
Alloy & Carbon-Boron Steel Grades
Manufactured from ultrasonic-tested EN8D (SAE 1045), SAE 1541, SAE 15B41, EN19 (SAE 4140 / 42CrMo4), and EN24 alloy steels with complete mill-to-dispatch heat number traceability.
Upsetter Forging & Cold-Rolled Involute Splines
Multi-pass horizontal upsetter forging forms high-integrity wheel flanges with continuous radial grain flow, followed by CNC turning and cold spline rolling or hobbing to DIN 5480, ANSI B92.1, and JIS standards.
Full-Length Induction Hardening & 100% MPI Testing
Automated vertical induction scanners deliver uniform case depth along the shaft body, fillet radius, and spline root, validated by micro-hardness traversal and 100% fluorescent magnetic particle inspection.












