Bearings are Smooth Rolling: R6 2rs ball bearings are made of chrome steel, also are pre-lubricated with grease.
Deep Groove Bearings: They are ball bearings in an outer metal ring with an inner metal ring, and a black plastic cover on the sides, work well in/out of water.
R6-2RS Ball Bearing: Pack of 20 pcs R8-2rs ball bearings, dimensions: 3/8"x5/8"x9/32" (9.5mm x 15.9mm x 7.14mm).
R6-2RS Miniature Ball Bearing: Deep groove ball bearing for high speeds and supporting both radial and axial loads, nice smooth running bearings.
Ldeal for Moderate Load Uses: Widely used in 3/8” aluminum pencil rod perfectly, glider rocking chair, windmill, Logan lathe worked well, walker, power tools, gear boxes, wheels, making a treadle or spring pole lathe ect.