Bearings are shielded to prevent penetration of dust and grease packed for life. They should not be cleaned with solvent or lubricated as this will dissolve the grease and cause premature bearing failure. Scrape off any resin build-up. Always check the tightness of the fixing screw before using cutter. Specifications: Cut Length Metric: 4.76, Cut Length Imperial: 3/16, Bearing Dia Metric: 15, Sawbore: 6.35, Sawbore Imperial: 1/4. PRECISELY ENGINEERED: Tailored with a 1/4 Inch bore and a 15 mm diameter, this bearing is ideal for professional router cutters, promoting peak performance. SHIELDED & GREASE-PACKED: The bearing is shielded to prevent dust penetration and comes pre-packed with grease for its lifetime, eliminating the need for solvent cleaning or additional lubrication. SIMPLE CLEANING: Any resin build-up can be easily scraped off to maintain the bearing's performance and prevent excess wear and tear. OPERATIONAL SAFETY: Always remember to check the fixing screw's tightness before using the cutter for secure and optimal operation. HIGH-QUALITY REPLACEMENT: As part of the Professional Router Cutters range, this bearing serves as a reliable replacement part, restoring your tool to its peak functioning state. Weight: 0.02 pounds, Manufacturer: Trend.