SKF
Grease Spraying Systems
SKF grease spraying systems are designed for the automatic, non-contact application of grease or heavy lubricant to large open gears, racks, pinions, chains, and surfaces where traditional contact applicators (brushes, pads) are impractical or prone to contamination. The system atomises or sprays neat grease through specially designed spray nozzles using compressed air, creating a controlled, adherent coating. SKF’s systems are used extensively on slewing ring gears on excavators and reclaimers, open gear drives on ball mills and kilns, large chains, and crane rail head lubrication. Grease spraying ensures comprehensive coverage, deep penetration into tooth flanks, and a protective layer that resists water washout and excessive fling-off. Timed or cycle-based control ensures re-application at intervals matched to the gear’s operating speed and environment. This results in dramatically reduced gear wear, lower noise, and safe, reliable automatic lubrication of hard-to-access drive elements.
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Non-Contact Application
Spray nozzles apply lubricant without touching the gear surface, reducing nozzle wear and contamination.
Full Coverage of Tooth Flanks
Atomised spray penetrates root and flank areas better than brush methods.
Adhesive, Heavy-Duty Greases
Formulations that cling to moving gears, resisting water and centrifugal fling.
Timed Automatic Operation
Programmable controllers spray at set intervals, synchronised with machine operation.
Reduces Manual Application Danger
Eliminates need for personnel to lubricate moving or inaccessible gears.
Extends Gear Life
Consistent, correct lubricant film reduces pitting and sliding wear.
Grease Spraying on Ball Mill Open Gears
Ball mill girth gears operate under heavy, dusty conditions with slow rotation. SKF’s grease spray system applies a precise, heavy-duty adhesive lubricant across the full gear face at programmed intervals, ensuring the pinion and girth gear mesh remains protected against abrasive dust and metal-to-metal contact, dramatically extending gear life and reducing unplanned mill outages.
Nozzle Design and Control for Optimal Spray Pattern
SKF’s atomising nozzles are designed to produce a flat fan or round spray pattern suitable for the specific gear width. The spray interval and duration are adjustable. Proximity sensors on the gear can be used to trigger spraying only when gear teeth are present, avoiding waste of expensive lubricant.