Ball bearing for woodworking cutter 12 pcs. Bearing Accessory Kit Heavy Duty Ball Bearings Bearing Shaft OOTDTY Features: & Made of metal, it is wear-resistant and has a long service life. The screw sizes should be identical to the original ones. Bearing Type: Top Mounted, Inner Diameter: 3/16", Overall Diameter is 3/8", Screw Size: #5-40x1/4". This range of bearings is designed to replace or repair damaged or lost mill bearings or to modify the depth of cut of the cutter. Use a suitable hex wrench to loosen the origin of the bolt and remove the old guide bearing. Make sure the bearing rotates when you install a new one on top of the cutter. Specification: Material: Metal Net Weight: 30g/0.07kg Inner Diameter: 3/16" Overall Diameter: 3/8"Package Included: 12pcs Woodwork Cutter Accessory SetNote: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.