Printable CNC preventive maintenance checklists

Vertical machining center PM checklist

For Haas, Doosan, Mazak, Okuma, Hurco, Fanuc-controlled VMCs and similar mills.

Every day

• Check way lube tank level and top off with the oil your manual calls for
• Check coolant level and concentration (refractometer)
• Check air pressure at the regulator and drain the water separator
• Clean chips from the table, way covers and around the tool changer
• Wipe the spindle taper and check tool holders for nicks and dirt
• Warm up the spindle before the first heavy cut
• Listen for new noises at the spindle and axes

Every week

• Clean the coolant tank screens and chip filters
• Check the spindle drawbar clamp and tool release
• Grease or check the tool changer per your manual
• Check way wipers for tears
• Clean electrical cabinet fan filters

Every month

• Check the hydraulic or counterbalance pressure (if equipped)
• Look over all cables in the cable carrier for wear
• Check the chip conveyor and coolant pump for noise
• Back up programs, offsets and parameters

Every year

• Replace encoder or control batteries (with power ON)
• Change hydraulic oil and spindle lube if your machine uses them
• Check machine level
• Ballbar test or laser check for accuracy
• Have a tech inspect the spindle (runout, drawbar force, noise)

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CNC lathe and turning center PM checklist

For Haas ST, Mazak QT, Okuma LB, Doosan Puma and other turning centers.

Every day

• Check way lube and hydraulic tank levels
• Check chuck pressure and lube the chuck jaws per the maker
• Check coolant level and concentration
• Clean chips from the turret, ways and tailstock area
• Drain the air filter water separator
• Check the chip conveyor is running

Every week

• Grease chuck jaws (more often on heavy production)
• Clean coolant screens
• Check turret indexing for noise or hesitation
• Inspect way wipers and covers
• Check bar feeder alignment (if used)

Every month

• Pull and clean the chuck jaws and master jaws
• Check tailstock operation and pressure
• Check cables and hoses for wear
• Back up programs, offsets and parameters

Every year

• Replace encoder and control batteries (power ON)
• Change hydraulic oil and filter
• Check level and turret alignment
• Inspect the chuck cylinder and draw tube
• Accuracy check by a tech

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Spindle care checklist

The most expensive part on the machine. These habits keep it alive.

Every day

• Run the spindle warm-up program before cutting, especially in a cold shop
• Wipe the spindle taper and tool holder tapers clean
• Watch the spindle load meter for changes
• Listen for growl, whine or knocking at different speeds

Every week

• Check pull studs for wear and correct type
• Check air blast and through-spindle coolant seals
• Clean and inspect tool holders; retire damaged ones

Every month

• Check spindle runout with a test bar or indicator
• Check spindle chiller or oil cooler level and fins
• Check the air/oil lube unit (if equipped)

Every year

• Measure drawbar clamping force
• Have a tech check bearing condition (vibration or noise)
• Log runout and temperature so you can see change over time

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Control cabinet and electrical checklist

For Fanuc, Haas, Siemens, Mitsubishi and Heidenhain controls.

Every week

• Check that cabinet fans are running
• Make sure cabinet doors are closed and seals are good (keep coolant mist out)

Every month

• Clean or replace cabinet air filters
• Check the cabinet A/C or heat exchanger for dust
• Look for coolant or oil inside the cabinet

Every year

• Replace the absolute encoder batteries with the control powered ON
• Replace the control memory battery per your manual
• Back up parameters, PMC/PLC, programs and offsets to a USB or memory card
• Check terminals for loose wires and heat discoloration (qualified person, power off)
• Write the battery change date on the cabinet

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Haas mill and lathe PM checklist

For Haas VF, UMC, ST and DS machines. Always follow your Haas operator’s manual for oils and intervals.

Every day

• Check way lube oil level (and spindle lube on machines that use it)
• Check coolant level and concentration
• Check air pressure at the regulator and drain the filter bowl
• Clean chips from the way covers and tool changer

Every week

• Clean the coolant tank chip basket and screens
• Check the tool changer for smooth tool release and clamp
• Check the auxiliary filter (if equipped)

Every month

• Check the cabinet fans and filters
• Inspect way covers and wipers
• Back up programs, offsets and settings to USB

Every year

• Check and replace the control battery per Haas
• Have a tech check spindle and axis condition and level
• Clean the coolant tank fully

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