Prevent breakdowns and maintain consistent production with structured maintenance support.
GETS Annual Maintenance Contracts (AMC) are designed to provide businesses with reliable, ongoing support for their CNC and industrial machines. By implementing a proactive maintenance strategy, we help prevent unexpected failures and ensure machines operate consistently throughout the year.
Our AMC services include scheduled inspections, preventive maintenance, and continuous monitoring, allowing potential issues to be identified and addressed before they escalate. This approach not only reduces downtime but also enhances machine longevity and operational stability, making it easier for businesses to plan production without disruptions.
These are real questions asked by machine operators, maintenance managers, and workshop owners – sourced from industry forums, People Also Ask results, and common queries in CNC machining communities.
Daily maintenance should be completed every shift, taking 10–15 minutes. Weekly tasks (lubrication, electrical checks) take 30–45 minutes and should be done at the start of each week. Monthly servicing covers fluid replacement and calibration. Quarterly and annual deep maintenance 2 including hydraulic oil changes, spindle checks, and full geometric calibration - should involve a qualified CNC technician. Every 500–1,000 hours of operation also triggers a manufacturer-specified service interval regardless of the calendar schedule.
Lubrication is consistently identified as the single most critical maintenance task. Industry data shows inadequate lubrication accounts for approximately 40% of mechanical failures in CNC equipment. Equally critical is spindle care - spindle bearing failure is the most catastrophic and expensive CNC failure mode. Daily temperature observation during warm-up, combined with monthly runout measurement, is your first line of defense for spindle health.
With consistent preventive maintenance, CNC machines typically last 15–25 years. Many well-maintained machines in stable environments operate reliably for over 20 years. Without structured maintenance, lifespan can be cut dramatically - and precision degradation often makes a machine functionally obsolete long before mechanical failure. A well-maintained spindle alone can last 10,000 to 15,000 hours; a neglected one may fail in half that time.
Operators can and should handle daily checks: cleaning, fluid level inspection, coolant verification, emergency stop testing, and visual inspections. Weekly lubrication and filter cleaning can also be operator-led with proper training. However, monthly calibration checks, axis backlash measurement, and spindle runout testing require more technical knowledge and specialized tools. Quarterly and annual tasks - geometric accuracy testing, hydraulic oil changes, full electrical inspection - should involve trained maintenance technicians or the machine manufacturer's service team.
Most CNC machining operations target a coolant concentration of 5–10%, measured with a refractometer. Too low a concentration causes overheating, bacterial growth, and corrosion on machine surfaces. Too high a concentration wastes coolant, can cause foaming, and may irritate operator skin. Always check concentration at the beginning of each week using a refractometer — a visual check of coolant level alone is insufficient. Contaminated coolant should be drained, the tank cleaned completely, and fresh coolant mixed to spec before refilling.
Early spindle bearing failure shows up as unusual noise during warm-up (grinding, clicking, or a high-pitched whine), abnormal temperature increase beyond your documented baseline, and increased vibration during cutting. Any unusual noise during warm-up is an immediate stop-and-inspect trigger - not a monitor-and-continue situation. Monthly spindle runout measurement and comparison against your baseline value gives you a trend line to detect gradual degradation before it affects part quality. Once runout deviates beyond manufacturer tolerance, schedule spindle service immediately.
The most common causes are ball screw backlash accumulation, worn linear guide preload, thermal drift from inadequate coolant or ambient temperature swings, encoder cable damage, and lubrication failure causing friction-induced positioning errors. Regular monthly backlash measurement on all axes, combined with consistent lubrication and temperature-controlled environments (ideally 15–25°C), prevents most accuracy drift. If parts start going out of spec suddenly, check the coolant system and lubrication first before assuming a mechanical failure.
A comprehensive CNC machine preventive maintenance checklist PDF typically includes: daily pre-shift inspection items (cleaning, fluid levels, E-stop test, spindle warm-up); weekly lubrication and electrical checks; monthly fluid replacement and calibration tasks; quarterly and annual deep service items; a sign-off column for operator and supervisor; and space for observations and escalations. A well-structured checklist is organized by machine subsystem — not just frequency - so technicians can work through one component area at a time rather than jumping between systems.
Annual preventive maintenance costs for a well-maintained CNC machine typically range from 1% to 5% of the original purchase price. For a machine costing $100,000, that is $1,000 to $5,000 per year in scheduled maintenance. By comparison, a single spindle failure can cost $15,000 to over $100,000 in parts alone — with production downtime, expedited shipping, and rework often pushing total costs to $50,000–$200,000. The ROI case for structured preventive maintenance is straightforward.
Preventive maintenance follows a fixed schedule - daily, weekly, monthly tasks regardless of machine condition. Predictive maintenance uses sensor data, vibration analysis, temperature trending, and oil analysis to predict when specific components will fail and schedule service only when actually needed. Predictive maintenance requires investment in monitoring technology but can reduce unnecessary PM labor while catching failures earlier. For most shops, the practical starting point is a disciplined preventive maintenance program with good documentation - predictive tools layer on top of, not instead of, that foundation.