About Us
Sumex Auto Tech designs and manufactures Universal Joint Crosses, propeller shaft sub-components, and associated driveline parts for medium and heavy commercial vehicle applications. Established in 2017 in Punjab, India, the facility operates a vertically integrated manufacturing setup combining CNC/VMC/HMC machining, gear hobbing, broaching, induction hardening, centreless grinding, and surface finishing under one roof.
Production is structured to meet OEM dimensional requirements and aftermarket fitment standards. Critical functional features — trunnion diameters, bearing seat geometry, spline profiles, and shaft concentricity — are held to tolerances of ±0.005 mm, supported by in-process inspection and batch-level traceability from raw material to dispatch.
Components are supplied to domestic OEM and aftermarket customers across truck, trailer, off-highway, and agricultural platforms. Active development programs are underway for supply to European, UK, US, and Australian markets.
Why Choose Us
Why Sumex — Technical Highlights
Single-Source Capability Across the Driveline Manufacturing Chain
Integrated Process Control
CNC turning, VMC multi-face milling, HMC production machining, gear hobbing, broaching, induction hardening, centreless grinding, and shot blasting — sequenced in-house. Eliminates inter-vendor dimensional variation and process drift between operations.
Tight Tolerance Machining
Functional features — trunnion diameters, bearing seats, spline profiles, bore geometries — maintained within ±0.005 mm using calibrated tooling and in-process verification at each stage. Statistically consistent across production lots.
Metallurgical Process Control
Induction hardening applied to functional zones with controlled case depth and hardness uniformity. Material inputs processed with heat number traceability against ASTM / EN / IS specifications.
Low Life-Cycle Cost by Design
Components are engineered for correct fitment in the first instance — dimensional compliance, surface finish, and hardness verified before dispatch — reducing the risk of premature failure and associated downtime.
Documentation Structure
Lot-specific control plans, dimensional inspection records, and dispatch traceability. Structured to support OEM audit requirements and export documentation standards.
Core Manufacturing Competencies
Integrated Machining & Gear Processing
CNC, VMC, and HMC operations for turning, multi-face milling, and production machining of crosses, yokes, shafts, and spline components. Gear hobbing and broaching for external and internal spline profiles. All geometry and form tolerances controlled in-house with no dependency on sub-contracted machining.
Material & Heat Treatment Discipline
Alloy and carbon steels processed from controlled inputs with heat number traceability. Induction hardening applied on functional zones — trunnion surfaces, bearing seats, spline roots — with case depth and hardness verified batch-by-batch. Where application requirements dictate, surface hardening parameters are aligned with fatigue and wear specifications.
Inspection & Process Discipline
ISO 9001:2015 aligned quality system with calibrated instruments across the dimensional range. Micrometers (0–300 mm), bore gauges, height gauges, and dial indicators used for in-process and final inspection. Documentation maintained per lot for OEM and export requirements.
Engineering Capability
Processes
Turning · Milling · Gear Hobbing · Broaching · Grinding · Induction Hardening · Shot Blasting · Coating
Materials
Alloy steels (EN / SAE grades) · Carbon steels · SG iron — per customer drawing
Applications
Medium & Heavy Commercial Vehicles · Off-Highway · Agricultural Machinery · Industrial Driveline
Traceability
Heat number → machining → heat treatment → inspection → dispatch — full lot linkage maintained
Certifications
ISO 9001:2015 (IATF 16949 in progress)
Manufacturing Timeline
Company established — driveline component manufacturing initiated
CNC/VMC machining operations launched for UJ crosses and yoke components
HMC, gear hobbing, broaching, and induction hardening integrated → Entry into full propeller shaft sub-component manufacturing
CNC/VMC capacity expanded; glide coating and specialised components added
Component portfolio scaled to 300+ active SKUs; machining throughput increased
500+ components in active production; CNC/VMC infrastructure and workforce expanded
Developing a new driveline component or qualifying an alternative supply source?
Share your drawing or specification. Our engineering team will review manufacturability, tolerance feasibility, and process routing before submission.