GRINDING OPERATOR (MARKET COMPETITIVE)

The Grinding Operator (BPS-04) serves as a skilled tradesperson within the production workshops of a federal government industrial establishment, such as Pakistan Ordnance Factories or Heavy Industries Taxila. The role's core purpose is to operate precision grinding machines — including surface, cylindrical, and centerless grinders — to finish metal components to exacting engineering tolerances and surface finish specifications required for defense hardware, heavy machinery, or industrial equipment assembly.

Daily workflow begins with interpreting engineering drawings and process sheets to determine grinding allowances, hardness values, and geometric tolerances. The operator selects and mounts appropriate abrasive wheels, performs balancing and dressing operations using diamond dressers, and sets up work-holding devices such as magnetic chucks, centers, or fixtures. During production, the operator monitors coolant flow, adjusts table feeds and wheel speeds, and performs in-process inspections using micrometers, vernier calipers, dial indicators, and surface roughness comparators. Completed parts are recorded in production logbooks and inspection registers, and machine lubrication schedules are strictly followed per the preventive maintenance plan.

Selection for this Category B post is conducted exclusively through a practical trade test and oral viva voce; no written examination is administered. Candidates must demonstrate hands-on proficiency by setting up a grinding machine, selecting and dressing a wheel, and producing a test piece within specified dimensional and surface finish tolerances. The practical demonstration is immediately followed by a technical interview assessing knowledge of grinding theory, wheel nomenclature, metrology, and workshop safety protocols.

• ✓Interpret engineering drawings and process sheets to identify grinding sequences, tolerances, and surface finish symbols
• ✓Select, mount, balance, and dress grinding wheels using diamond dressers according to material hardness and finish requirements
• ✓Set up workpieces on magnetic chucks, between centers, or in fixtures ensuring alignment and secure clamping
• ✓Operate surface, cylindrical, or centerless grinding machines to achieve tolerances within +/- 0.01 mm and surface finishes of 0.4-0.8 Ra
• ✓Perform in-process and final inspection using micrometers, vernier calipers, height gauges, and surface roughness testers
• ✓Maintain machine cleanliness, execute daily lubrication charts, and report abnormal vibrations or coolant contamination to the shift supervisor

• 💡Blueprint reading and Geometric Dimensioning & Tolerancing (GD&T) interpretation for grinding operations
• 💡Grinding wheel specification knowledge (abrasive type, grit, grade, structure, bond) per ISO/ANSI marking systems
• 💡Precision machine setup including wheel truing, balancing, and workholding alignment techniques
• 💡Advanced metrology skills: operation of outside/inside micrometers, dial indicators, sine bars, and profilometers
• 💡Coolant management: concentration monitoring, filtration awareness, and application methods for ferrous and non-ferrous metals
• 💡Occupational safety compliance: wheel guard adjustment, spark deflection, PPE usage, and emergency stop procedures