Twenty Pack 6904 Full Ceramic Si3N4 Ball Bearings Size Twenty By Thirty Seven By Nine Millimeters For Industrial And Commercial Machinery Applications High Precision Ceramic Bearings Set

Premium 6904 full ceramic ball bearings, 20x37x9mm
✔️ 20 bearings per pack; ID 20 mm, OD 37 mm, width 9 mm

These 6904 full ceramic bearings use Si3N4 ceramic races and balls, delivering high hardness, low friction, and excellent corrosion resistance. They’re ideal for precision equipment, high-speed machines, and applications where non-magnetic, non-lubricated operation is preferred.

✅ Size: ID 20 mm (0.787 in), OD 37 mm (1.457 in), width 9 mm (0.354 in)
✅Material: Si3N4セラミック製レースとボール、PTFE製ケージ
✅ Pack: 20 bearings per pack; includes sealed packaging for cleanliness
✅ Applications: high-speed spindles, cleanrooms, corrosion-prone environments

💡 What is a full ceramic bearing used for in harsh environments and what benefits do Si3N4 bearings bring? They are handy in tough applications where cleanliness and precision matter. - High hardness reduces wear and extends life - Excellent chemical resistance enables use in corrosive atmospheres - Non-magnetic properties protect sensitive electronics