A cement mill, raw mill preventive maintenance schedule lists the checks and jobs done on the equipment at fixed intervals, how long each takes, and in what order of frequency, so problems are found before the cement mill, raw mill fails. This page gives the schedule used in the PlantOps360 task library for cement mill, raw mill (and vertical roller mill), which follows common industry practice for general-purpose equipment. It is also searched for as ball mill cement, vertical roller mill, VRM, raw mill.
The maker’s manual and your site safety procedures always come first where they differ. Intervals set by law differ by state.
Cement mill, raw mill preventive maintenance schedule and checklist
| How often | Task | Estimated time |
|---|---|---|
| Daily | Check the mill lubrication, bearing temperatures, vibration and main drive current | 10 min |
| Daily | Check the separator, mill fan and dust collector differential pressure | 5 min |
| Weekly | Check the grinding media level or roller and table wear; check the hydraulic system pressure | 20 min |
| Monthly | Check the girth gear lubrication and gear mesh; check the oil filters and cooler | 45 min |
| Quarterly | Check the liners, diaphragms and mill shell (ball mill) or roller and table liners (VRM) | 90 min |
| Half-yearly | Take the oil sample and analyse; check the gearbox and drive couplings | 180 min |
| Annual | Annual shutdown: overhaul of the bearings, gear and main drive; check the liners and alignment | 1200 min |
Cement mill, raw mill maintenance frequency and yearly workload
At the estimated times, one cement mill, raw mill needs about 150 hours of preventive maintenance a year. The biggest single job is “Annual shutdown: overhaul of the bearings, gear and main drive; check the liners and alignment” at 1200 minutes, done annual. Multiply by the number of units you have to see the workload for your plant.
| Frequency | Tasks | Time per round | Hours per year |
|---|---|---|---|
| Daily | 2 | 15 min | 91.3 h |
| Weekly | 1 | 20 min | 17.3 h |
| Monthly | 1 | 45 min | 9.0 h |
| Quarterly | 1 | 90 min | 6.0 h |
| Half-yearly | 1 | 180 min | 6.0 h |
| Annual | 1 | 1200 min | 20.0 h |
What goes wrong on a cement mill, raw mill without preventive maintenance
- Liner, roller and table wear
- Lubrication and bearing faults
- Separator and mill fan faults
- Dust collector problems
What to watch between services
- Bearing temperatures and vibration
- Wear measurements
- Mill power and differential pressure
Safety and statutory notes for cement mill, raw mill maintenance
Mills need strict lockout and confined-space entry procedures. Grinding media and liners are heavy and need rated lifting.
Where a cement mill, raw mill preventive maintenance schedule is used
This equipment is used in the industries below. Each link opens the preventive maintenance schedule guide for that industry, and the maintenance software page where we have one.
- Preventive maintenance schedule for steel, foundry, forging and metal plants · maintenance software for steel and metals
- Preventive maintenance schedule for cement, glass, ceramics and building materials plants · maintenance software for cement
- Preventive maintenance schedule for mines and mineral processing plants · maintenance software for mining
- Preventive maintenance schedule for thermal and hydro power plants · maintenance software for power plants
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Browse the full list of equipment preventive maintenance schedules (317 types).
Run this cement mill, raw mill schedule in maintenance software
In preventive maintenance software, each row above becomes a recurring task on the asset with its checklist, time estimate and parts. Tasks can be triggered by calendar date, running hours, meter readings or production cycles, each completed task is recorded with the person and date, and a failed check can open a work order. For the method behind it, read the guide to the preventive maintenance schedule, or use the free generator to get a 12-month plan for your whole equipment list.
Build my preventive maintenance schedule (free Excel)
Frequently asked questions
How often should a cement mill, raw mill be serviced?
In our schedule a cement mill, raw mill has 7 tasks: 2 daily, 1 weekly, 1 monthly, 1 quarterly, 1 half-yearly, 1 annual. The biggest job is “Annual shutdown: overhaul of the bearings, gear and main drive; check the liners and alignment”, which is done annual. Always follow the maker’s manual where it gives a different interval.
What is included in cement mill, raw mill preventive maintenance?
It covers routine checks and jobs such as “Check the mill lubrication, bearing temperatures, vibration and main drive current”, “Check the separator, mill fan and dust collector differential pressure”, “Check the grinding media level or roller and table wear; check the hydraulic system…”, up to the annual overhaul or inspection. The full list with times is in the table above.
How many hours of maintenance does a cement mill, raw mill need per year?
About 150 hours per unit per year at the estimated times in our library, including the daily checks done every day. Use it to plan workload, not as a benchmark.
Is there a free cement mill, raw mill maintenance checklist?
Yes. The table on this page is a ready checklist. The free preventive maintenance schedule generator turns it into a 12-month Excel schedule for your list of equipment, with monthly workload hours.