Whiteside Bearing with No-Mar Nylon Sleeve 1/2 in. OD x 3/16 in. ID is a high-quality industrial bearing designed for precision and durability. These bearings are the same as those used as equipment on Whiteside's bearing mounted router bits, ensuring reliable performance. They are for replacing worn-out bearings, adjusting cutting depths by interchanging with existing bearings, or adding to bit shanks to create bearing-guided bits for template or pattern work. The bearing features a non-marring nylon outer sleeve that helps prevent marking and burning on your workpiece, making it i for delicate or finished surfaces. For optimal use, be sure to pair the bearing with the appropriate size lock collar, such as LC14 or LC12, when adding it to bit shanks. Each bearing is sold individually and is manufactured by Whiteside Machine Company in Claremont, North Carolina. Model Number: B3S