Quality Assurance

Quality Reliability

Quality control of products begins from raw material itself.

Raw Material

Steel is purchased from approved steel mills only.

Forgings

Forgings are manufactured or received heat code wise in duly isothermally annealed or normalized condition. Stringent QA control is followed, assuring the following checks are carried out before further processing.

Check of chemical composition by spectro analysis

• Jominy hardenability
• Micro structure and inclusions
• Grain size and grain flow
• Dimensional inspection

In Process

• First off inspection at each manufacturing station.
• Patrol inspection at the defined interval as per the control plan by QA inspectors.
• For bevel gears we check tooth contact in soft gears, with topography inspection where required.
• Before heat treatment, dimensional inspection of all machined parameters is ensured.
• For bevel gears, final testing on a Gleason tester to ensure backlash at the correct mounting distance, tooth contact, and marking mounting distance adjustment if required.
• CMM inspection at CNC turning and VMC milling stages.

Heat Treatment

Batches are subjected to checks on:

• Effective case depth
• Core and surface hardness
• Microstructure, case and core
• Flatness and roundness of the bore for crown wheels
• Straightness for shafts
• Magnetic particle inspection by Magnaflux