Most bearing failures in a cement plant don't start with a bad bearing, they start with a lube round that looked complete on paper but wasn't. A grease point that got skipped, the wrong grade applied, or a gun that pumped in more than the bearing could hold, all three look identical on a checked-off route sheet. Sign up to track every grease point, lubricant type, and quantity against your daily route in one place.
Why It Matters
Roughly 70 percent of bearing failures in a cement plant trace back to a lubrication issue, contamination, the wrong grease, or an incorrect quantity, not a defective bearing. Facilities routinely believe their lube rounds are near-complete while actual completion runs closer to 75 to 82 percent, which is exactly where premature failures come from.
What Every Lube Point Check Should Cover
Point Identification
Correct grease point confirmed against the asset tag, not assumed from memory
Lubricant Type
Correct NLGI grade and base type checked against spec, not whatever's convenient
Quantity
Measured pumps or volume applied, not a guess based on how long the gun was squeezed
Leak Check
Seal weeping or purge grease buildup checked at every point, not just when reported
Contamination
Fitting wiped clean before connecting, purged grease checked for dust or discoloration
Interval Compliance
Actual service date logged against the required interval, not just marked complete
The Daily Lube Round, Step By Step
Confirm the correct lubricant before leaving the lube room: match the color-coded container and grease type to the point's specification, mixing incompatible greases causes more damage than skipping a cycle
Wipe the fitting clean before connecting the gun: dust and grit sitting on the zerk fitting goes straight into the bearing on the next pump
Apply the specified number of pumps, not until resistance is felt: over-greasing causes bearing churning, heat buildup, and seal damage just as reliably as running dry
Check purged grease for contamination: gray or gritty discharge signals dust ingress or water contamination, worth flagging even if the point looks otherwise fine
Log the point immediately, with a photo if required: a route completed from memory at the end of a shift is where missed points hide behind a fully checked sheet
Know Which Points Were Actually Serviced
Oxmaint tracks every grease point, lubricant type, quantity, and interval against your daily route, and flags a point the moment it falls behind schedule. Sign up for a free trial to run it on your own lube route data, or book a demo to see it configured for your plant.
Too Much Grease Fails A Bearing As Fast As Too Little
Over-lubrication feels like the safe mistake, but it isn't. Excess grease packed into a bearing housing has nowhere to go, so it churns with the rolling elements, generates heat, and pushes outward against the seal until it fails, at which point the bearing is now exposed to exactly the dust and moisture the seal was supposed to keep out. A grease gun set to a fixed number of pumps per point, rather than run until resistance is felt, is one of the simplest changes that stops this pattern before it starts.
Issue, Cause & Fix
| Issue |
Cause |
Fix |
| Bearing running hot |
Over-greasing, grease churning inside the housing |
Purge excess, switch to fixed-pump dosing per point |
| Gray or gritty purge grease |
Dust ingress through a damaged seal or dirty fitting |
Inspect seal condition, wipe fittings before every connection |
| Premature seal failure |
Excess grease pressure pushing outward against the seal |
Correct dosing quantity, verify relief vent is clear |
| Repeat failures on same point |
Wrong lubricant grade or incompatible grease mixed in |
Verify OEM spec, flush and re-grease with the correct type |
The Takeaway
A lube round is only as good as its weakest habit, whether that's a skipped point, a guessed quantity, or a dirty fitting. Fixing those habits costs nothing but attention, and it's consistently cheaper than the bearing failures that lubrication issues cause.
Frequently Asked Questions
Q
How much grease is too much on a single point?
Any amount beyond the OEM-specified number of pumps or volume is too much. The correct approach is a fixed quantity per point based on bearing size and speed, not squeezing the gun until resistance is felt, which almost always overfills the housing.
Q
Why do paper lube round records overstate actual completion?
Technicians commonly check off hard-to-reach or low-priority points without actually servicing them, especially near the end of a long route. Without a verification method like a required photo or timestamped log per point, a supervisor has no way to distinguish a serviced point from a skipped one.
Q
Can mixing two different greases damage a bearing?
Yes. Incompatible thickener systems can break down when mixed, softening the grease and reducing its ability to hold its structure under load. That's why color-coded, dedicated containers per lubricant type matter as much as applying grease at all.
Make Every Lube Round Provable, Not Just Checked Off
Oxmaint records grease type, quantity, contamination checks, and interval compliance for every lube point in your plant, turning a paper route sheet into a verified maintenance record. Sign up for a free trial to run it on your own lube route data, or book a demo to see it configured for your plant.
