Maintenance-Free Bearings (With Patent) are advanced rolling bearings engineered to operate reliably for extended periods without relubrication or scheduled maintenance. These patented designs incorporate innovative sealing systems, specialized lubricant reservoirs, or self-lubricating materials that eliminate the need for periodic greasing, reducing downtime and total cost of ownership.
Maintenance Free Bearings (Patented)
Characteristics: Embedded solid lubricant (graphite/MoS2) in raceway grooves; self-lubricating matrix; patented sealing for particular application.
Advantages: Lifetime >10,000 hours in dry vacuum or cleanroom where standard grease outgasses. Zero lubrication cost for 5 years in semiconductor equipment.
Technical Ceiling: Max speed 3 m/s surface speed; load limit 25% of standard grease bearing (contact pressure ~500 MPa); operating range -100°C to +250°C.
Caution: Cannot replace standard bearings under heavy load or high speed (>4 m/s). The solid lubricant film does not replenish if overloaded – catastrophic dry metal contact occurs. Must derate load by factor 4.
