Trend Router Cutter Bearing - for 3/16in bottom mounting High quality ball bearing for free running against an edge to prevent heat build up. 3/16in inside diameter for use on bottom mounted trimmer and profiling cutters. 1/2in outside diameter for matched fit to trimming and templating cutters. Bearings are grease packed for maximum efficiency and lifespan. Shielding to both sides of the bearing prevents penetration of dust for maximum performance. Specifications • Cut Length Metric: 4.76 • Cut Length Imperial: 3/16 • Bearing Dia Metric: 12.7 • Bearing Dia Imperial: 1/2 • Sawbore: 4.76 • Sawbore Imperial: 3/16