Welcome To Punjab Bevel Gears Ltd. (PBGL)

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 / Normalized condition. And 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
Grains 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, topography inspection when required etc
Before Heat treatment dimensional Inspection of all machined parameters is ensured.
For Bevel Gears Final Testing on Gleason tester to ensure backlash at a 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 a bore for Crown Wheels
Straightness for Shafts
Magnetic Particle Inspection by Magnaflux