Whiteside B9U Bearing – Undersized for sharpened router bits 0.490″OD, 1/4″ID

After you’ve sharpened your router bits a few times, you could find that the outside diameter has gotten a little smaller. The undersized 1/2″ bearing measures in a 0.49″. 

• .049″ Outside Diameter
• 1/4″ Inside Diameter