Wholesale 639 Full Ceramic Si3N4 Bearings 9x30x10 Miniature-Pack of 20

639 Full Ceramic Ball Bearing, measures an inner diameter of 9mm, outer diameter is 30mm and the width is 10mm, a standard bearing size commonly used in a variety of industrial and commercial applications, Bearing is made from Ceramic.

• 639 Ball Bearing
• Full Ceramic Ball Bearing
• Cage Material: PTFE (Polytetrafluoroethylene)
• Balls: Si3N4 Ceramic (Silicon Nitride)
• Inner/outer races: Si3N4 Ceramic (Silicon Nitride)
• Dimensions: 9mm x 30mm x 10mm/Metric
• ID (inner diameter)/Bore: 9mm
• OD (outer diameter): 30mm
• Width: 10mm
• Size: 8x28x9
• Quantity: 20 Bearings