6908ZZ Double Shielded Chrome Steel Bearings 40 x 62 x 12 mm

6908ZZ ball bearing is a maintenance-free spare deep groove ball bearing for hubs. Sealed, high quality execution.
Product Details

6908ZZ Double Shielded Chrome Steel Bearings 40 x 62 x 12 mm


ABEC 3 bearings from PQB Bearings feature 10th-degree chrome steel balls that are twice as round as the industry standard, and manufactured to the highest standard. The treads are made of a 52100 carbon chrome steel alloy that is vacuum-generated and then hardened for extra strength and durability. A high-gloss polish ensures precision and low noise.


PQB full bearings are characterised by a 35 to 40 % higher load capacity than standard radial bearings. For 20 years PQB Bearings has been manufacturing them specifically for use on mountain bike shocks. As its name indicates, Full bearings are fitted with the maximum possible number of balls. The grooves in the races are deeper to accommodate the multiple lateral turning forces at the MTB rear pivot.


This is a High Quality ball bearing - Deep Groove - Radial Bearing 6908 ZZ ABEC 3 (40 x 62 x 12mm) ABEC 3 rate Designed to use for markets bearing, transmissions, gearboxes, belts, chain and related products, and offers a spectrum of powertrain rebuild and repair services.




Bearing Type Ball
For Load Direction Radial
Construction Single Row
Seal Type Sealed
Part Number 6908ZZ
For Shaft Diameter 40mm
Bore Dia (d) 40mm
Bore Dia Tolerance -0.008mm to 0
For Housing ID 62mm
Outer Dia (D) 62mm
Outer Dia Tolerance -0.008mm to 0
Width (B) 12mm
Width Tolerance -0.12mm to 0
Ring Material 52100 Chrome steel
Ball Material 52100 Chrome steel
Cage Material 300 Series Stainless Steel
Shield Material 300 Series Stainless Steel
Dynamic Load Rating (Cr) (Newtons) 13700
Static Load Rating (Cor) (Newtons) 9920
Max Speed (Grease) (X1000 RPM) 11
Max Speed (Oil) (X1000 RPM) 13
Lubrication Required
Shaft Mount Type Press Fit
Temperature Range -30° to 110 °C
ABEC Rating ABEC-3
Radial Clearance Trade No. C0
Radial Clearance 0.003mm to 0.018mm
RoHS Compliant
Ball Qty 14
Ball Dia 6.747mm
Weight (grams) 131

1 Applicable only for open, single Z, ZZ, single RU and 2RU types in inner ring rotating conditions. Max. speeds for the contact rubber seal(s) types will be around 50-60 % of above values.
2 Applicable only for open, single Z, ZZ, single RU and 2RU types in inner ring rotating conditions. Max. speeds for the contact rubber seal(s) types will be around 50-60 % of above values.


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