10Pcs Miniature Skate Roller Ball Bearings ABEC-5 Skateboard Scooter 8*22*7 mm  

• Bearing Type: Sealed
• Bore Dia (d): 8.000 mm
• Outer Dia (D): 22.000 mm
• Width (B): 7.000 mm
• Radius (min) (rs): 0.30 mm
• Dynamic Load Rating (Cr): 2,799 N
• Static Load Rating (Cor): 1,103 N
• Max Speed (Grease): 34,000 rpm
• Max Speed (Oil): 40,000 rpm
• Max. Shaft Shoulder Dia. Inner (Ui): 10.5 mm
• Min. Housing Shoulder Dia., Outer (Uo): 19.03 mm
• Ball Qty: 7
• Ball Dia (Dw): 3.969 mm
• Weight (g): 12.80 grams
• Precision: ABEC-5
• Standard Clearance: C0/(K25)
• Material: 52100 Chrome Steel