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Monthly preventive maintenance record for CNC machining centres, lathes and routers
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Maintenance Items
Mark the applicable column for each item: P = Pass | F = Fail | N/A = Not applicable. Record notes for any F.
| # | Check | P | F | N/A | Notes / Action |
|---|---|---|---|---|---|
| Spindle System | |||||
| 1 | Spindle bearing condition: no abnormal vibration, heat or noise during warm-up | ||||
| 2 | Spindle taper: clean, no scoring, burrs or coolant residue | ||||
| 3 | Drawbar pull force: tested with gauge, within manufacturer specification | ||||
| 4 | Spindle oil or grease: level correct, no discolouration or contamination | ||||
| 5 | Spindle orientation: indexes correctly, orientation sensor functioning | ||||
| Way Lubrication | |||||
| 6 | Central lubrication reservoir: oil level adequate, correct grade filled | ||||
| 7 | Lubrication pump: cycling correctly, no alarm on control | ||||
| 8 | Distribution lines: no leaks, kinks or disconnected fittings | ||||
| 9 | Oil flow indicators: oil visible at each axis guide way | ||||
| Axis Drives | |||||
| 10 | Ball screw backlash (X axis): measured and within tolerance | ||||
| 11 | Ball screw backlash (Y axis): measured and within tolerance | ||||
| 12 | Ball screw backlash (Z axis): measured and within tolerance | ||||
| 13 | Linear guide rails: no scoring, debris or corrosion; wipers intact | ||||
| 14 | Servo motors: no unusual noise, heat or vibration during rapid traverse | ||||
| 15 | Axis reference (home) positions: accurate after power cycle | ||||
| Automatic Tool Changer (ATC) | |||||
| 16 | Tool change cycle: smooth operation, no hesitation or misalignment | ||||
| 17 | Tool pot alignment and retention: all pots seated, springs holding tools | ||||
| 18 | Gripper arm / fingers: no wear, cracks or contamination | ||||
| 19 | Carousel or chain: tension correct, no excessive wear or noise | ||||
| 20 | Air blast nozzle: clear, adequate air flow to clean taper before insertion | ||||
| # | Check | P | F | N/A | Notes / Action |
|---|---|---|---|---|---|
| Coolant & Chip Management | |||||
| 21 | Coolant concentration: tested with refractometer, within 5-10% range | ||||
| 22 | Coolant pH: tested, within 8.5-9.5 range (no bacterial growth) | ||||
| 23 | Coolant tank: clean, no excessive sludge, tramp oil skimmed | ||||
| 24 | Coolant pump: operating correctly, adequate flow and pressure | ||||
| 25 | Nozzles and through-spindle coolant: aligned, clear, no blockages | ||||
| 26 | Chip conveyor: belt or auger functioning, no jams or motor overload | ||||
| Hydraulic & Pneumatic Systems | |||||
| 27 | Hydraulic oil level and condition: within range, no discolouration | ||||
| 28 | Hydraulic filter: differential pressure acceptable, replaced if due | ||||
| 29 | Air supply pressure: at correct set point (typically 0.5-0.7 MPa) | ||||
| 30 | Air regulator, filter and lubricator (FRL): drained, clean, oil level correct | ||||
| 31 | No air or hydraulic leaks at fittings, hoses or cylinders | ||||
| Electrical & Control | |||||
| 32 | Electrical cabinet: fan running, filter clean, no overheating | ||||
| 33 | Encoder battery voltage: above minimum threshold (replace if low) | ||||
| 34 | PLC battery: voltage acceptable, backup maintained | ||||
| 35 | Cables and connectors: no chafing, damage or loose connections | ||||
| 36 | Alarm log: reviewed, recurring faults investigated and addressed | ||||
| Safety Systems & Machine Levelling | |||||
| 37 | Emergency stop buttons: all tested and functional (front, rear, pendant) | ||||
| 38 | Door interlock: machine halts when guard door is opened | ||||
| 39 | Light curtain or guard switch: tested and operational | ||||
| 40 | Machine bed level: checked with precision spirit level, within specification | ||||
Defects & Action Required (list any item marked F: reference item # from checklist)
| Item # | Defect description | Action taken / reported to | Rectified by / date |
|---|---|---|---|
Declaration
I declare that I have completed this CNC machine maintenance inspection in accordance with the manufacturer service schedule and site procedures. I have recorded all findings accurately and reported any defects or non-compliant items to my supervisor. The machine will not be returned to production until any faults that affect part quality, safety or compliance have been rectified. I understand that failure to complete scheduled maintenance or report defects may breach company policy and WHS obligations.