Parts :: Bearings :: 1/4" Inner Diameter Shank Bearing :: 1/2" OD X 1/4" ID X 3/16" Height 1/4" Inner Diameter Shank Bearing - Yonico 10103
Yakamoz 2Pcs 1/4'' Shank Top and Bottom Bearing Guide Flush Trim Pattern Router Bit Set Woodworking Cutter Tool with 10 Pcs Top Mounted Replacement Bearings - - Amazon.com
Ball Bearing Router Bits - StewMac
Replacement Router Bit Guide Bearing, 1/4'' I.D. x 5/8'' O.D. | Rockler Woodworking and Hardware
Router Bits & Components - Power Tool Accessories | Bosch
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Whiteside Double Bearing Flush Trim Router Bit by Woodpeckers