6904 Roulement à billes entièrement en céramique (nitrure de silicium), 20x37x9mm . Roulement de précision 20x37x9mm destiné aux machines industrielles et commerciales. Faible coefficient de frottement et résistance à l'usure pour une longue durée de vie dans les secteurs de l'automobile, de la robotique, de l'agroalimentaire et des équipements généraux.

Single 6904 Ceramic Bearing 20x37x9 mm for tough systems
✔️ ID 20 mm, OD 37 mm, width 9 mm; full ceramic SiC bearing

This is a 6904 full ceramic bearing built with silicon nitride components for exceptionally low weight, high rigidity, and excellent corrosion resistance. It’s a common choice in precision machinery, CNC spindles, robotics, and other industrial equipment where smooth operation and long service life matter.

✅ Inner diameter 20 mm; outer diameter 37 mm; width 9 mm
✅ Silicon carbide (SiC) ceramic balls and SiC races for longevity
✅ PTFE cage for low-friction operation in demanding environments
✅ Heat, chemical, and moisture resistance for sealed ball bearing setups
✅ Ideal for high-speed, precision use in linear slide units and machinery

💡 What is a ceramic bearing used for in industrial equipment? Ceramic bearings excel in high-speed, high-load, and harsh environments. - They reduce friction and heat in spindle and linear slide units
- They resist moisture, chemicals, and temperature swings
- They offer longer life in sealed ball bearing configurations
- They support precision alignment and smoother motion