High precision R4 2RS hybrid ceramic bearings for bike

R8 2RS hybrid ceramic bearings for bike *high qualityand favorable price *quick delivery *OEM service *strict inspect system

The description of High precision R4 2RS hybrid ceramic bearings for bike:

Bearing No: R4 2RS bearing

Size:		R4-2RS
Inside Diameter:		6.35mm
Outside Diameter:		15.875mm
Width:		4.978mm
Material:		Chrome steel
Seals / Shields:		2RS ( rubber seal on both sides)
Inch  Diameter:		1/4''x5/8''x0.196''  (0.25x0.625x0.196)
Max Load:	Dyn <Cr(N)>:	1480
	Stat<Cor(N)>:	621
RPM of grease Bearings (x1000):		38
RPM of oil Bearings (x1000) :		45
Quantity of balls:
Diameter of balls:
Min.Raius(rs):		0.3mm

Now we can produce two kinds of ceramic bearings: ZrO2 ceramic bearings and Si3N4 ceramic bearings.

(1) Zirconia bearings (ZrO2) full ceramic bearing series

Application: chemical industry, food mechanism, marine equipment sea water area and so on. 

Feature: with PTEE cages which have higher corrosion resistance, appliance temperature from 150 centigrade to 450 centigrade.

(2) Silicon nitride bearings (Si3N4) full ceramic bearings series  Feature : This kind of ceramic bearings have wider range of application in material usage, it's hardness could reach to HRC80 and the extreme high temperature could reach to approximately 800 centigrade, therefore smooth surface and hardness and non-lubrication are attributions of this material.Application: ultra-high vacuum, rc,high speed spindle machines, grinders, dental drill, instrument,skates ...  

High precision R4 2RS hybrid ceramic bearings for bike