Cement-plant lubrication: open gears, mills, kilns and contamination

Map equipment by process and lubrication point

Crushing, raw grinding, rotary kilns and cement grinding present very different speeds, loads and exposure. Crushers experience shock; large mills and kiln drives may use slow, heavily loaded open gears; reducers operate with enclosed sumps or circulation. Treating cement lubrication as one category overlooks lubricant delivery, contamination removal and film formation.

Reference: FUCHS Cement Industry Brochure (2021) · FUCHS: Open Gear Lubrication

The FUCHS cement guide discusses open gears, bearings, hydraulics and grinding rollers separately and distinguishes open-gear priming, running-in and service products. This is a source-specific example of process classification; performance and approvals cannot be transferred to PTT. Energy savings, drain-life multiples and temperature claims require the exact product version, equipment and test conditions before procurement or site acceptance.

Reference: FUCHS Cement Industry Brochure (2021) · FUCHS: Open Gear Lubrication

Open gears require lubricant, spray and contact control

Open gears face dust and slow, heavy loading, making tooth contact and lubricant coverage critical. Check the equipment requirements, gear size and load, spray-system capabilities and ambient temperature. Selecting solely by viscosity or extreme-pressure claims without pumpability and nozzle compatibility may yield a product that looks suitable on paper but cannot be delivered reliably.

Reference: FUCHS: Open Gear Lubrication · FUCHS Cement Industry Brochure (2021)

Inspect delivery pressure, spray cycles, coverage from each nozzle and blockage; after safe isolation inspect tooth contact, local scoring and accumulated contamination. Rule out failed nozzles and poor contact before changing dosage. Extra lubricant cannot correct alignment and may build up. Tooth damage, abnormal temperature or delivery loss requires escalation under the plant's shutdown procedure, not improvised hand application.

Reference: FUCHS: Open Gear Lubrication · FUCHS Cement Industry Brochure (2021)

Identify roller and bearing design first

Reference: FUCHS Cement Industry Brochure (2021)

Grinding rollers and roller presses do not all use the same grease. The FUCHS guide describes grease and sealed circulating-oil designs, requiring bearing and seal details. Circulation systems need checks of flow, cooling, return and filter differential pressure alongside oil quality. Local overheating despite normal supply also calls for load and mechanical checks. In grease systems, verify delivery through distributors to each point; a running main pump does not prove endpoint supply.

Reference: FUCHS Cement Industry Brochure (2021)

Manage dust, water and sampling locations together

Dust can enter through breathers, seals, open filling and maintenance; water may come from the environment or cooling circuit. Identify the entry route before selecting sealing, filling filtration or cooler repair. Use covered, lubricant-specific tools and protect drums from pooled water and lost labels. Darkening alone does not establish oil condemnation; assess viscosity, water, wear and contamination with operating records.

Reference: FUCHS Cement Industry Brochure (2021) · Mobil Lubricant Analysis

Sample circulation oil at a safe, representative point and record machine, oil, service age, top-ups and sampling state. Retain a new-oil baseline and repeat abnormal results using the same point and method; do not directly compare bottom sediment with main-flow samples. Agree tests and limits with equipment, lubricant and laboratory specialists. Rapid deterioration with noise, pressure loss or overheating requires immediate site response rather than waiting for routine sampling.

Reference: Mobil Lubricant Analysis · FUCHS Cement Industry Brochure (2021)

Make purchasing and trials verifiable

Provide point lists, current products, equipment specifications, load, temperature, delivery hardware and fault history. Require point-by-point matching and a changeover plan. Define delivery stability, tooth condition, temperature trends and oil tests before a trial, then compare under comparable production loads. Savings or longer drains without a baseline cannot separate production, environment and repair effects; public recommendations also require verifiable product specifications.

Reference: FUCHS Cement Industry Brochure (2021) · FUCHS: Open Gear Lubrication

Acceptance records can link each point's product, delivery method, verified nozzle/distributor results and responsible person to shutdown work and later inspections. This preserves evidence of actual delivery to working surfaces across shifts and supplier changes rather than relying only on warehouse issues.

Reference: FUCHS Cement Industry Brochure (2021) · FUCHS: Open Gear Lubrication

Frequently asked questions

Q1. Does every cement-plant component use open-gear lubricant?

No. Bearings, enclosed reducers, hydraulics and circulation systems have different requirements and need point-specific selection.

Q2. Will increasing spray quantity solve gear wear?

Not necessarily. Check nozzle coverage, delivery, contact and alignment first; extra lubricant cannot repair mechanical faults.

Q3. Can another brand's savings figures be used to recommend PTT?

No. Verifiable evidence must apply to the specific PTT product version and operating conditions.

Sources and applicable limits

1. FUCHS Cement Industry Brochure (2021) — Separate kiln, mill, roller press and packaging duties; no PTT approval equivalence. (Accessed 2026-10-08)
2. FUCHS: Open Gear Lubrication — Lubricant quality, volume and application on slow high-torque open gears. (Accessed 2026-10-08)
3. Mobil Lubricant Analysis — Condition monitoring by equipment type, without guaranteed life percentages. (Accessed 2026-10-08)