Lubrication Routes: Building Rounds That Actually Get Done

Key takeaways

• Ad-hoc lubrication fails in a predictable pattern: easy points get over-greased weekly, awkward points go untouched for months, and failures cluster on the forgotten points.
• The lube map comes first. Walk the plant and record every lubrication point: asset, point id, lubricant, quantity, frequency and method. You cannot design routes around points nobody has written down.
• Consolidating lubricants from a shelf of near-duplicates down to a handful cuts wrong-grease accidents, and mixing incompatible thickener types can turn two good greases into soup.
• Calibrate every grease gun. Output per stroke varies several times over between guns, so a shot count written without calibration is fiction. Weigh 10 strokes, divide by 10, recalculate the shots.
• Route compliance, points completed versus points scheduled each week, tells you whether the programme is real; falling compliance predicts the bearing failures that follow.

Why routes beat ad-hoc lubrication

Left to habit, lubrication follows convenience, not need. The pump at eye level gets a few shots every time someone passes with a gun; the fan bearing up a ladder, behind a guard, gets remembered twice a year. Both damage bearings: over-greasing churns the grease, overheats the element and blows seals, while the starved point runs dry until it stops the machine.

A lubrication route replaces habit with a sequence: a defined list of points, in walking order, with lubricant, quantity and method specified per point, done on a fixed cadence by a named person. The difference is not sophistication, it is completeness: the two hundredth point gets the same treatment as the first.

This article is about getting the rounds designed and completed. How often each bearing needs grease and how much, including the quantity formula, is covered in our guide to bearing relubrication intervals; the route is the delivery mechanism for those numbers.

Build the lube map before anything else

The lube map is a plant-wide inventory of every lubrication point. There is no shortcut: someone walks the plant, asset by asset, and records for each point:

• Asset and point id, so "the motor bearing" becomes "P-104, drive end bearing, point 3 of 4".
• Lubricant, by product name, not "the blue grease".
• Quantity and frequency, from the bearing calculation or the manufacturer's manual.
• Method: grease gun, oil can, level top-up, or a check on an automatic lubricator.

Expect surprises. Most plants that map honestly find points no one has serviced in living memory, points that two people were both greasing, and fittings that are painted over or broken.

Consolidate the lubricants

The map usually exposes a second problem: plants routinely stock a dozen greases where four would do. Every extra product on the shelf is another chance to put the wrong grease in a bearing.

Consolidation means grouping points by their real requirements (base oil viscosity, thickener, temperature, load, speed) and picking the smallest set of products that covers them, with the supplier or a lubrication engineer confirming the substitutions. Fewer products means fewer guns, fewer labels, fewer mistakes.

One hazard deserves respect during the changeover: grease incompatibility. Thickener chemistries do not all coexist; mixing incompatible types, lithium complex with polyurea being the classic example, can soften the blend until two good greases turn into soup that runs out of the bearing. Compatibility charts differ by manufacturer, so when in doubt, purge through: keep greasing until the old product visibly stops coming out.

Designing routes that fit a real working day

With the map and the shortened lubricant list in hand, route design is three sorting steps:

• Group by frequency first: daily, weekly, monthly, quarterly. A route mixes badly across frequencies; a daily walk that includes monthly points invites "while I am here" over-greasing.
• Then group by area, and sequence each route so the technician walks the plant once, not five times.
• Time each route honestly. Walk it with a watch, including ladder time, guard removal and wiping fittings. A route that needs 3 hours in a 1 hour slot is a fiction that will be signed off unwalked.

Keep individual routes under about an hour where possible. Short routes get finished; long ones get truncated by the next interruption, always at the same tail-end points. Schedule the routes as recurring tasks in the same preventive maintenance plan as the rest of the PM programme, with a named owner per route, and treat route competence as a line on the maintenance skills matrix rather than folklore carried by one veteran.

Grease gun discipline

The grease gun is a metering instrument that is almost never treated as one. Three rules make it honest:

• One gun per grease type. A shared gun is a mixing vessel. Colour code the gun and the fitting caps so the match is visible at a glance.
• Calibrate every gun. Output per stroke varies several times over between guns. The method costs five minutes: pump 10 strokes onto a scale, divide by 10: that is your grams per stroke.
• Write shots per point on the route sheet, calculated from the required quantity and that specific gun's output. "3 shots" only means something once the gun is calibrated.

Wipe the fitting before coupling, every time. A gun pushes whatever sits on the nipple straight into the bearing, which is how a lubrication round becomes a contamination round.

Oil work on the same rounds

Routes are not only greasing. The oil-lubricated population needs its own line items:

• Levels and top-ups, with the right oil in a dedicated, sealed, labelled container. Open jugs collect water and dirt faster than any bearing can tolerate; our ISO 4406 oil cleanliness code guide shows how quickly counts climb.
• Breather and sight glass checks: a saturated desiccant breather or a milky sight glass is a finding, not a footnote.
• Sampling points: where a gearbox or hydraulic unit is on an oil sampling programme, the draw belongs on the route so it happens at consistent intervals under consistent conditions.

Automatic lubricators remove the greasing task, not the route stop. Cartridges empty, batteries die and units get knocked off, so every lubricator stays on the route as a check item: present, dispensing, in date.

Measure route compliance, and believe it

Route compliance is points completed divided by points scheduled, per week. It is the most useful lubrication metric because it leads: bearings fail months after the missed rounds, so falling compliance this quarter is next quarter's failure list. Track it per route, not as a plant average, because one abandoned route hides comfortably inside a good average.

In Fabrico, each route runs as a recurring PM task with the point-by-point checklist attached, results are stored per asset, a failed check can trigger a follow-up task, and the completion history is there when an auditor or a warranty claim asks what was done and when. To see your own lube map running as routes, book a short demo.

A worked example with real numbers

A food plant maps 320 lubrication points across 46 assets. The map shows 11 greases in the store; consolidation with the supplier gets that down to 4, each with its own colour coded gun.

The points sort into routes like this:

• 1 daily route: 12 critical points, about 25 minutes.
• 3 weekly routes: about 60 points each, 45 to 60 minutes each, one per plant area.
• 1 monthly route: 74 points.
• 1 quarterly round: the remaining 54 points, mostly gearbox oil levels, breathers and sample draws.

Calibration is the eye-opener. The three guns in service deliver 0.9, 1.4 and 2.1 grams per stroke, so the plant's habitual "5 shots" had been delivering from 4.5 to 10.5 grams, more than a twofold spread, to identical bearings. Shot counts are recalculated per gun and printed on the route sheets.

After a year: route compliance holds above 90 percent, bearing-related stops on the six worst assets drop measurably, and total grease consumption goes down despite more points being serviced, because the daily over-greasing of the convenient points stopped. Less grease, better bearings is the signature of a route programme working.

Common mistakes

• One mega route nobody ever finishes. The sheet gets signed anyway, the same tail-end points get skipped every week, and completion quietly becomes a lie. Split it.
• Uncalibrated grease guns. Shot counts on the route sheet mean nothing until each gun's grams per stroke is measured. Recheck after a change of product.
• Mixing greases in one gun. Incompatible thickeners can soften into soup inside the bearing. One gun, one grease, colour coded.
• The route living in one veteran's head. When they retire or take leave, the plant discovers it was never written down. The lube map and route sheets are the cure.
• No owner per route. A route assigned to "the shift" is assigned to no one. Name a person, name a deputy.
• Skipping hard-to-reach points. If a point needs a guard off and a ladder, it will be skipped forever. Engineer the access: extended grease lines, remote fittings or an automatic lubricator.
• Treating automatic lubricators as fit-and-forget. An empty or expired cartridge protects nothing. Keep every unit on the route as a check item.

Frequently asked questions

How do I build a lubrication route?

Map every lubrication point first: asset, point id, lubricant, quantity, frequency and method. Then group points by frequency (daily, weekly, monthly, quarterly), group within frequency by area, sequence each route in walking order, and time it honestly with a watch. Keep routes under about an hour, give each a named owner, and schedule them as recurring tasks.

How often should each point be greased?

It depends on bearing size, speed, temperature and environment, so there is no single answer. Manufacturer guidance and the standard relubrication interval calculations set the starting point per bearing, adjusted by operating conditions. Our bearing relubrication intervals guide covers the calculation; the route delivers whatever interval it produces.

How much grease does a point need?

The common starting point is the quantity formula based on bearing dimensions, corrected by the manufacturer's figures where they exist. Convert that quantity into strokes for the specific calibrated gun on the route and write the shot count on the route sheet. Without calibration the count is guesswork.

Can different greases be mixed?

Often not. Thickener types have incompatibilities, and mixing incompatible greases can soften the blend until it runs out of the bearing. Check the manufacturers' compatibility guidance before any changeover, and when in doubt purge through: grease until the old product visibly stops coming out. Never share one gun between grease types.

How do I measure lubrication route compliance?

Count points completed versus points scheduled each week, per route, and trend it; a plant average hides an abandoned route. Falling compliance is a leading indicator: the bearing failures arrive months later, on the points that stopped being serviced.