BEARINGS/ZERO

ZERØ Ceramic Grade

Proven time and again in World Cup race conditions, the ZERØ Ceramic bearings are the ultimate race day weapon. Oversized Grade 3 balls roll on races which are ground to a mirror finish after receiving Magnetite and then Cryogenic treatments for hardness and longevity. More durable and with even lower rolling resistance than any 2RS bearings, they come closer to that magic “zero” rolling resistance number.  Enduro Bearings uses Silicone seals which are more slippery than rubber seals used by other ceramic bearing suppliers. We get more email and blog feedback on the ZERØ’s than any other bearing, describing the noticed difference in downhill rolling speed. And they win the independent wattage output tests when stacked against the competition. If you want to buy raw speed, ZERØ bearings are it.

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Description

Enduro Bearings Friction Comparison and Bearing Life

Torque = P (Load on Bearing) x M (Coefficient of Friction) x Dm (Pitch Diameter of Bearing)

M sl ：(Sliding Frictional Moment) Nmm
U sl ：(Effect of lubrication on Sliding Friction)
M seal ：(Frictional Moment of Seals)
M retainer ：(Retainer Material resistance)

6902 Sealed Bearing Examples:
Watts

Note: For the first 1,000 Kilometers there is more resistance friction in Enduro bearings because we fill both sides with 90% grease fill to insure longer bearing life. Also, seal friction tends to go down as the grease lubricates the sealing lips over time.

Relative Frictional Losses: Seal (60%), Grease (28%), Retainer Friction (7%), Rolling Friction including ball and raceway deformation, skidding (5%).

 

Item 樣式 Dimensions

Static Capacity

IDxODxWidth

 Weight（grams） Barcode
BB CO 6001 VV 徑向培林 12 x 28 x 8 mm 225 17.7 810191012283
BB CO 608 VV 徑向培林 8 x 22 x 7 mm 142 10.1 810191012429
BB CO 6702 VV 徑向培林 15 x 21 x 4 mm 45 3.2 810191018745
BB CO 6801 VV-bx 徑向培林 12 x 21 x 5 mm 105 5.3 810191012290
BB CO 6802 VV 徑向培林 15 x 24 x 5 mm 126 6.4 810191012306
BB CO 6803 VV 徑向培林 17 x 26 x 5 mm 189 6.9 810191012313
BB CO 6804 VV 徑向培林 20 x 32 x 7 mm 197 15.5 810191012320
BB CO 6805 VV 徑向培林 25 x 37 x 7 mm 253 18.7 810191012337
BB CO 6900 VV 徑向培林 10 x 22 x 6 mm 136 8.3 810191012566
BB CO 6901 VV 徑向培林 12 x 24 x 6 mm 143 9.8 810191012375
BB CO 6902 VV-bx 徑向培林 15 x 28 x 7 mm 195 13.9 810191012382
BB CO 6903 VV 徑向培林 17 x 30 x 7 mm 215 14.5 810191012399
BB CO MR 15267 LLB 徑向培林 15 x 26 x 7 mm 176 10.8 810191012894
BB CO MR 17287 LLB 徑向培林 17 x 28 x 7 mm 215 13.0 810191010333
BB CO MR 9227 VV 徑向培林 9 x 22 x 7 mm 133 10.0 810191018803

 

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