8mm U Groove Ball Bearing 0840UU Groove Guide Pulley Sealed Rail Ball Bearing 8*40*20.7mm
U type pulley, the internal bearing fine bearing steel. Strong bearing capacity, flexible rotation, internal upgrade stainless steel bearings, can be used in the wet environment, not rust.
Inner diameter: 8mm
Outer diamter: 40mm
Load more than 50KG, smooth operation, good mute effect.
Internal lubrication grease , can be used in the wet environment, not rust.
Widely used in doors and windows to track and drive mechanical equipment.
1 x wheel bearing