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Safety Protocol 001: Precision Measurement and General Shop Safety

Protocol ID: U8M4-SAFE-001

Potential Hazards

  • Sharp edges on machined parts: Freshly machined edges and burrs cause lacerations when handling parts for measurement
  • Dropped measuring instruments: Micrometers, calipers, and gauge blocks are heavy enough to cause foot injuries and fragile enough to be destroyed on impact
  • Gauge block handling: Gauge blocks have razor-sharp edges and corners that can cause cuts
  • Chemical exposure: Cleaning solvents, cutting fluid residue, and rust preventatives can cause skin irritation. Prolonged metalworking coolant contact causes occupational dermatitis; coolant mist inhalation can cause respiratory irritation. Wear nitrile gloves when handling coolant-wet parts and use splash protection (safety glasses/face shield) during heavy coolant operations.
  • Slip/trip hazards: Coolant on floors, chips on walking surfaces, and tools left on the floor
  • Repetitive strain: Extended measurement sessions can cause hand and wrist fatigue

Required Precautions & Procedures

  1. Deburr before measuring: Always deburr machined parts before handling for measurement. Sharp burrs cause lacerations.
  2. Clean hands: Handle precision instruments with clean, dry hands. Oils and acids from skin cause corrosion on precision ground surfaces.
  3. Secure storage: Return instruments to protective cases after each use. Never leave instruments on machine surfaces where vibration can walk them off the edge.
  4. Calibration checks: Verify instrument zero before critical measurements. Report any instrument that does not zero properly.
  5. Two-hand rule: Always hold the workpiece and the instrument simultaneously. Do not balance workpieces on the bench edge while trying to measure.
  6. Gauge block care: Handle gauge blocks with lint-free gloves or clean hands. Wring blocks together with a sliding motion—never slam. Demagnetize blocks after use if applicable.
  7. Solvent safety: Use cleaning solvents in ventilated areas. Wear nitrile gloves when cleaning parts with solvents. Keep solvents away from heat sources.
  8. Floor maintenance: Clean up any drops of oil, coolant, or solvent immediately. Chips on the floor are a slip hazard—sweep regularly.

Emergency Response

  • Laceration from sharp burr/edge: Apply pressure, clean wound, bandage. Metal cuts are infection-prone—clean thoroughly with antiseptic. Seek medical attention for deep cuts.
  • Dropped instrument on foot: Assess for injury. If wearing steel-toe boots, injury is unlikely. If not, assess for fracture (swelling, inability to bear weight).
  • Solvent splash (eyes): Flush at eyewash for 15 minutes. Refer to the SDS for specific chemical. Seek medical attention.
  • Skin reaction to chemicals: Wash affected area with soap and water. Apply barrier cream. Report to supervisor. Seek medical attention if reaction persists.

PPE Requirements

PPE Item Required Standard/Rating Notes
Safety glasses Always in shop ANSI Z87.1 Even when only measuring
Steel-toe boots Always in shop ASTM F2413 Heavy instruments can drop
Nitrile gloves When using solvents Chemical resistant Remove when operating machines
Lint-free gloves Handling gauge blocks Clean cotton or nylon Prevents corrosion from skin oils
Closed-toe shoes Always Non-slip Minimum if steel-toe not available

Last Updated: 2026-03-19