What does Australian WHS law require for CNC machine inspections?

Under the WHS Act 2011 and WHS Regulations 2011, the PCBU must ensure that plant, including CNC machines, is maintained in a safe condition and inspected by a competent person before use. Part 5.1 of the Regulations requires risks associated with plant to be managed, which includes regular documented inspections. AS 4024.1 (Safety of machinery) provides additional guidance on guarding, interlocks and emergency stop requirements that must be verified during inspections.

How often should a CNC machine pre-start inspection be done?

A daily pre-start inspection must be completed before the first operation of each shift. If the machine runs multiple shifts, each operator completes their own pre-start. Coolant concentration should be checked daily. Spindle runout measurement and detailed periodic inspections should be performed monthly or quarterly per the manufacturer schedule. After any crash, tool breakage, power failure during a cycle or modification to guarding, a targeted inspection must be completed before the machine returns to production.

What spindle checks should be included in a CNC machine daily inspection?

A daily spindle check should include running the spindle at low RPM and listening for abnormal noise, vibration or bearing rumble. Check the spindle taper for nicks, fretting or contamination that would prevent correct tool seating. Verify the drawbar pull-back tension is adequate by confirming the tool holder seats flush and does not pull out by hand. At regular intervals (monthly or quarterly), measure spindle runout with a dial indicator and a precision test bar to track bearing wear trends over time.

Why are guard interlocks important on a CNC machine?

Guard interlocks on CNC machines prevent the operator from accessing the cutting zone while the spindle is running or axes are in motion. Under AS 4024.1, guards on machines with rotating parts must be interlocked so that opening the guard stops the machine. Bypassing or defeating a guard interlock is a serious WHS breach that exposes operators to entanglement, contact with sharp tooling, hot chip ejection and workpiece ejection hazards. During the daily inspection, testing each guard interlock confirms the safety system is functional.

What is the difference between a daily pre-start and a periodic CNC machine inspection?

A daily pre-start is an operator-level check completed before each shift. It covers walk-around condition, fluid levels, spindle sound, axis movement, guard interlocks, emergency stops and obvious defects. It typically takes 10 to 20 minutes. A periodic inspection is a more detailed technical examination completed by maintenance technicians at monthly or quarterly intervals. It covers spindle runout measurement, ball screw backlash, geometric accuracy, hydraulic pressure testing, electrical cabinet inspection and lubrication system servicing. Both are required for WHS compliance and reliable machine performance.

Can I use a digital checklist for CNC machine inspections?

Yes. Digital CNC machine inspection checklists in MapTrack replace paper forms with mobile-friendly inspections that capture timestamps and photos automatically. Completed inspections are linked to the machine asset record. Supervisors can view real-time dashboards showing which machines have been inspected and which are overdue, and defects flow directly into maintenance work orders for close-out tracking across the workshop.

Free cnc machine daily inspection checklist

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Free CNC machine daily inspection checklist (PDF-ready). Covers spindle, axis movement, coolant, lubrication, guards, e-stops and tool holder. Download free.

Jarrod Milford

Commercial Director

Updated 3 May 2026

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What is a cnc machine daily inspection checklist?

A CNC machine daily inspection checklist is a structured pre-start form used to verify the operational safety and mechanical readiness of a computer numerical control (CNC) machine before each shift. It covers the spindle and spindle motor, axis movement and way covers, tool holder and automatic tool changer (ATC), coolant system, lubrication system, hydraulic and pneumatic systems, electrical cabinet and control panel, safety guards and interlocks, emergency stop buttons, chip conveyor and the work-holding system (chuck, vice or fixture). Each item is marked Pass, Fail or N/A with space for defect notes and corrective actions.

CNC machines, including CNC lathes, milling centres, turning centres and multi-axis machining centres, operate at high spindle speeds with significant cutting forces. Rotating components, sharp tooling, hot chips and coolant mist create multiple hazard categories. Under the WHS Act 2011 and WHS Regulations 2011, the PCBU must ensure that plant is maintained in a safe condition and inspected before use by a competent person. AS 4024.1 (Safety of machinery) and AS 1418 provide additional guidance on guarding, interlocks and emergency stop requirements. A documented daily pre-start checklist helps operators identify spindle runout, lubrication failures, guard interlock bypasses, coolant contamination and other defects before they lead to tool breakage, workpiece ejection, entanglement or operator injury. It also creates the documented inspection trail required for WHS compliance, insurer audits and quality management systems such as ISO 9001.

Learn more about pre-start inspections in MapTrack.

Benefits of using this cnc machine daily inspection checklist

Spindle reliability: detect abnormal vibration, runout and bearing noise before they cause tool breakage or poor surface finish.
Guard and interlock assurance: verify all safety guards are in place and interlocks are functional, preventing operator access to moving parts during the cutting cycle.
Coolant system hygiene: check coolant level, concentration and condition to prevent bacterial growth, corrosion and inadequate chip flushing.
Lubrication protection: confirm way lube, spindle oil and hydraulic fluid levels are correct, preventing premature wear of precision guideways and bearings.
Emergency stop confidence: test all e-stop buttons to confirm they halt all machine motion immediately, giving operators confidence in the safety system.
Quality consistency: a machine that has been properly inspected and warmed up produces more consistent dimensional accuracy and surface finish from the first part.

Benefits of digitising forms in MapTrack

When you digitise cnc machine checklists in MapTrack, you get:

Field users can easily scan a QR code to complete a form on mobile. Unlimited users.
Automatically get alerts when faults are identified.
Link every form digitally as a PDF to the relevant asset, location or person.
Receive a digital PDF copy with every submission to your email.
Ability to share forms digitally.
Build conditional logic (show or hide questions based on answers).
Take pictures or attach photos. Not possible with a paper-based form.
Electronic signatures.
Edit forms later without reprinting.
Restrict permissions (who can view, complete or approve).
Build forms with AI (describe what you need and MapTrack suggests the form).
Auto-schedule pre-start forms so operators are prompted before every shift.
Flag overdue pre-starts on the dashboard so nothing leaves the yard unchecked.
Link each pre-start to the asset record for a complete inspection history.

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What to include in a cnc machine daily inspection checklist

This cnc machine daily inspection checklist covers 10 key areas:

Machine and operator details: machine number, type (lathe, mill, turning centre, 5-axis), make, model, serial number, CNC control type, operator name, competency reference, date and shift.
Spindle and spindle motor: visual and auditory check for abnormal vibration or bearing noise, spindle taper condition, drawbar tension (if applicable), spindle orientation function.
Axis movement and way covers: jog each axis through its full travel and listen for abnormal noise or binding. Check way covers for damage, chip accumulation underneath and correct sealing.
Tool holder and ATC: inspect tool holder tapers for fretting, nicks and contamination. Cycle the automatic tool changer through a tool change and verify correct seating and retention. Check the tool magazine for loose or missing tools.
Coolant system: coolant level, concentration (refractometer reading), colour and odour. Check pump operation, nozzle aim, filter condition and chip conveyor function.
Lubrication system: way lube reservoir level, spindle oil level (if separate), hydraulic fluid level, grease points (if manual). Check the lubrication pump indicator for correct cycle.
Hydraulic and pneumatic systems: hydraulic pressure gauge reading, air pressure gauge reading, regulator and filter condition, chuck or fixture clamping pressure.
Safety guards and interlocks: door interlocks (guard closed = machine can run, guard open = machine stops), chuck guard (lathe), chip shield, splash guard condition.
Emergency stops and controls: test each e-stop button location (operator panel, rear of machine, pendant). Verify the control panel power-on sequence, mode selector (auto, manual, MDI) and feed hold function.
Defect register and sign-off: item, description, severity, corrective action, responsible person, due date, operator signature and supervisor acknowledgement.

How to use this cnc machine daily inspection checklist

Record machine identification and operator details at the top of the form.: Note the machine number, type, make, model, serial number, CNC control type, date, shift and your name and competency reference. Confirm you have completed the required training for the machine type. Record any relevant conditions such as ambient temperature, which can affect machine warm-up accuracy on precision work.
Power on the machine, home all axes and perform a visual walk-around inspection.: Power on the CNC control and follow the manufacturer home sequence for all axes. While the machine is homing, walk around it and inspect the exterior for leaks, damaged way covers, loose panels and chip accumulation. Check that the work area is clear of tools, rags and loose items. Inspect the chuck or vice for damage and cleanliness.
Check all fluid levels, coolant condition and lubrication systems.: Check the coolant tank level and top up if required. Use a refractometer to verify coolant concentration is within the manufacturer specification (typically 5-10%). Check coolant colour and odour for signs of bacterial contamination. Verify way lube reservoir level, spindle oil level and hydraulic fluid level. Confirm the lubrication pump cycle indicator is operating correctly. Check the air pressure gauge and regulator setting.
Jog each axis, run the spindle, cycle the tool changer and test work-holding.: In manual mode, jog each axis through its full travel at low feed rate and listen for abnormal noise, vibration or binding. Run the spindle at low RPM and listen for bearing noise. Cycle the automatic tool changer through a complete tool change and verify correct tool seating. Clamp a test piece in the chuck or vice and verify clamping pressure is adequate. Check for hydraulic or pneumatic leaks during clamping.
Test all safety guards, interlocks, emergency stops and control functions.: Close the main guard door and verify the interlock allows the machine to run. Open the guard door during a test cycle (dry run, no workpiece) and confirm the machine stops immediately. Press each emergency stop button and verify all motion ceases. Reset each e-stop and confirm the machine recovers correctly. Test the feed hold button, mode selector switch and spindle override dial.
Record all defects, determine the overall result and sign off the form.: Document every failed item with a description, severity rating and corrective action. Any safety-critical defect, such as a bypassed guard interlock, non-functional emergency stop, spindle bearing failure or hydraulic leak on the chuck clamping system, means the machine must not be operated until the defect is rectified. Attach a Do Not Operate tag, lock out the machine isolator and notify the supervisor and maintenance team. Sign the form and submit it for review and retention.

In MapTrack, you can run digital pre-starts attached to each asset. Each submission is stored as a timestamped PDF against the asset record.

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How often should you complete this checklist?

A CNC machine daily inspection must be completed before the first operation of each shift. If the machine runs across day and night shifts, each shift operator must complete their own pre-start check before commencing production. This is consistent with the WHS Regulations 2011 requirement to inspect plant before use.

In addition to the daily pre-start, a more detailed periodic inspection should be carried out at intervals specified by the machine manufacturer and the facility maintenance schedule, typically monthly or quarterly. Spindle runout should be measured with a dial indicator at regular intervals to track bearing wear. Coolant concentration should be checked daily, with a full coolant change at the interval recommended by the coolant manufacturer (typically every 3-6 months). Lubrication systems should be serviced per the manufacturer schedule. After any crash, tool breakage incident, power failure during a cycle or any modification to guarding or interlocks, a targeted inspection must be completed before the machine returns to production. In MapTrack you can schedule daily, weekly and monthly inspection intervals per machine and track compliance across your entire CNC fleet.

Frequently asked questions

What does Australian WHS law require for CNC machine inspections?: Under the WHS Act 2011 and WHS Regulations 2011, the PCBU must ensure that plant, including CNC machines, is maintained in a safe condition and inspected by a competent person before use. Part 5.1 of the Regulations requires risks associated with plant to be managed, which includes regular documented inspections. AS 4024.1 (Safety of machinery) provides additional guidance on guarding, interlocks and emergency stop requirements that must be verified during inspections.
How often should a CNC machine pre-start inspection be done?: A daily pre-start inspection must be completed before the first operation of each shift. If the machine runs multiple shifts, each operator completes their own pre-start. Coolant concentration should be checked daily. Spindle runout measurement and detailed periodic inspections should be performed monthly or quarterly per the manufacturer schedule. After any crash, tool breakage, power failure during a cycle or modification to guarding, a targeted inspection must be completed before the machine returns to production.
What spindle checks should be included in a CNC machine daily inspection?: A daily spindle check should include running the spindle at low RPM and listening for abnormal noise, vibration or bearing rumble. Check the spindle taper for nicks, fretting or contamination that would prevent correct tool seating. Verify the drawbar pull-back tension is adequate by confirming the tool holder seats flush and does not pull out by hand. At regular intervals (monthly or quarterly), measure spindle runout with a dial indicator and a precision test bar to track bearing wear trends over time.
Why are guard interlocks important on a CNC machine?: Guard interlocks on CNC machines prevent the operator from accessing the cutting zone while the spindle is running or axes are in motion. Under AS 4024.1, guards on machines with rotating parts must be interlocked so that opening the guard stops the machine. Bypassing or defeating a guard interlock is a serious WHS breach that exposes operators to entanglement, contact with sharp tooling, hot chip ejection and workpiece ejection hazards. During the daily inspection, testing each guard interlock confirms the safety system is functional.
What is the difference between a daily pre-start and a periodic CNC machine inspection?: A daily pre-start is an operator-level check completed before each shift. It covers walk-around condition, fluid levels, spindle sound, axis movement, guard interlocks, emergency stops and obvious defects. It typically takes 10 to 20 minutes. A periodic inspection is a more detailed technical examination completed by maintenance technicians at monthly or quarterly intervals. It covers spindle runout measurement, ball screw backlash, geometric accuracy, hydraulic pressure testing, electrical cabinet inspection and lubrication system servicing. Both are required for WHS compliance and reliable machine performance.
Can I use a digital checklist for CNC machine inspections?: Yes. Digital CNC machine inspection checklists in MapTrack replace paper forms with mobile-friendly inspections that capture timestamps and photos automatically. Completed inspections are linked to the machine asset record. Supervisors can view real-time dashboards showing which machines have been inspected and which are overdue, and defects flow directly into maintenance work orders for close-out tracking across the workshop.

Applicable regulatory standards

This template aligns with the following regulations and standards:

WHS Act 2011 (Duty to ensure health and safety of workers)
WHS Regulations 2011 Part 5.1 (Management of risks of plant)
AS 4024.1 Safety of machinery (General principles, guarding, interlocks)
ISO 9001 Quality management systems (documented inspection requirements)

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