CNC MILLING OPERATOR (MARKET COMPETITIVE)

The CNC Milling Operator (BPS-05) serves as a skilled tradesperson within the production division of a federal government industrial establishment, responsible for setting up, operating, and maintaining Computer Numerical Control (CNC) milling machines to manufacture precision components for defence, engineering, and infrastructure projects. The role demands strict adherence to technical drawings, process sheets, and quality standards to ensure dimensional accuracy and surface finish of machined parts.

Daily workflow involves interpreting engineering drawings and G/M-code programs, selecting and mounting cutting tools and work-holding fixtures, performing tool-length and work-offset measurements using touch probes or dial indicators, executing machining cycles on Fanuc, Siemens, or Heidenhain controls, and conducting in-process inspections with vernier calipers, micrometers, height gauges, and coordinate measuring machines (CMM). The operator records production data in shop-floor logbooks, performs routine preventive maintenance (lubrication, coolant management, chip removal), and reports tool wear or machine alarms to the shift supervisor for corrective action.

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 proficiency in CNC machine setup, program simulation, component machining to tolerance, and tool management on the shop floor, followed by a technical interview assessing knowledge of machining parameters, safety protocols, and troubleshooting.

• ✓Interpret engineering drawings and CNC programs to determine machining sequence, cutting tools, and work-holding requirements
• ✓Set up CNC milling machines by installing fixtures, loading tools, establishing work coordinates, and verifying program zero points
• ✓Execute machining operations while monitoring cutting conditions, tool life, and machine alarms to ensure uninterrupted production
• ✓Perform in-process and first-article inspections using precision measuring instruments to verify dimensional and geometric tolerances
• ✓Carry out daily preventive maintenance including lubrication, coolant concentration checks, filter cleaning, and chip conveyor operation
• ✓Document production output, tool consumption, and non-conformance reports in prescribed shop-floor registers and digital tracking systems

• 💡Proficiency in reading mechanical drawings with GD&T symbols and generating or editing G-code for 3-axis and 4-axis milling
• 💡Expertise in tool geometry selection, cutting parameter optimization (speed, feed, depth of cut) for ferrous and non-ferrous alloys
• 💡Competence in operating Fanuc, Siemens, or Heidenhain CNC controls including MDI mode, program simulation, and offset adjustments
• 💡Skill in using precision metrology tools (micrometers, bore gauges, dial indicators, CMM) for inspection and setup verification
• 💡Knowledge of machine kinematics, coolant systems, and preventive maintenance schedules for vertical and horizontal machining centers
• 💡Ability to diagnose common machining defects (chatter, built-up edge, dimensional drift) and apply corrective actions promptly