uxcell 12Pcs U Type Groove Nylon Plastic Guide Bearing 5x21x7mm, White | U Type Pulley Roller Wheel, Bearing Roller Wheels

uxcell 12Pcs U Type Groove Nylon Plastic Guide Bearing 5x21x7mm, White | U Type Pulley Roller Wheel, Bearing Roller Wheels

• Package Contains: 8 Pcs U groove bearings. (I.D. = 5mm, O.D. = 21mm, thickness = 7mm, groove width = 4mm)
• Wide Application: Widely used in pulleys, conveyor belts, guide rail systems, suitable for automation machinery, furniture hardware accessories, mobile doors, glass sliding doors, aluminum doors, and DIY projects
• Features: Crafted with chrome steel bearing and nylon guide pulley for superior corrosion resistance and high-load capacity. The nylon plastic outer ring can reduce operating noise and protect the contact surface from scratches. Especially suitable for humid environments that need whisper-quiet movement and oxidation
• Easy Installation: First, clean the shaft and mounting position, press the bearing vertically into the shaft seat, ensure that the U-groove faces the force-bearing side, and test idling without jamming
• Notes: Manual measurements may have slight variations within reasonable tolerance. The nylon plastic outer ring is not suitable for high-speed scenarios. It is recommended to add grease regularly to extend its life