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Hybrid Bearing > Hybrid Bearing > Bearing steel ceramic ball Hybrid Bearing > Bearing Steel Ceramic Ball Hybrid Bearing 6903 2RS
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Bearing Steel Ceramic Ball Hybrid Bearing 6903 2RS
Goods ID:110007448
Original price:$3.04Price notification
Specification:6903 2RS
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Product parameters

Goods ID: 110007448 Brand: NETMALL
Category: Bearing steel ceramic ball Hybrid Bearing Weight:(g) 20.00
Bearing No.: 6903 2RS Color: Natural color
Equivalent other models: Operating characteristic:
Dimensions-IDd:(mm) 17 Dimensions-ODD:(mm) 30
Dimensions-WidthB:(mm) Dimensions-Inner Width:(mm) 7
Dimensions-Outer Height:(mm) 7 Bearing material-Outer Ring Material: GCr15
Vibration level: Bearing material-Inner Ring Material: GCr15
Race Type: Bearing material-Rolling element material: SI3N4
Seal Type: 2RS Bearing material-Bearing cage material: 08F
Bearing precision grade: P0 Bearing material-Sealing members material:
Internal clearance: Rated load-dynamic load:(KN) 4.6KN
Type of lubricant: Rated load-static load:(KN) 2.55KN
Speed ​​limit-Grease lubrication:(rpm) Speed ​​limit-Oil lubrication:(rpm)

Product Feature

High speed, good dimensional stability, high wear resistance, good magnetic insulation properties, can effectively prevent grease ionization degeneration


Electrical, instrumentation, internal combustion engines, generators, construction machinery and other fields

Product Details

In the development and application of engineering ceramic products , ceramic ball bearings is a successful example of engineering ceramics are widely used in the industrial field , and are highly valued in many countries . In the high-speed precision and electromagnetic insulation performance requirements of the occasion , the most widely used hybrid ceramic ball bearings, rolling elements that use hot Si3N4 or ZrO2 ceramic ball bearing ring remains rims . This high degree of standardization bearing on the small structural changes , easy maintenance , particularly for high speed operation and magnetic power applications. Its high-speed motor assembly , a high-speed , high stiffness , high power, long life and other advantages . Bearing configuration: inner and outer rings bearing steel / stainless steel + ceramic ball + PA66 / stainless steel holder

Hybrid ceramic ball bearings features :

Temperature : Thermal expansion coefficient of the ceramic balls , in a high temperature environment because of the temperature does not cause expansion of the ball bearing , thereby greatly enhancing the use of the temperature of the bearing , plain bearing temperature of 160 degrees , the ceramic balls can reach 220 degrees Celsius above. horses 13-967-37-76-90

High speed : ceramic ball with oil-free self -lubricating properties , low coefficient of friction ceramic balls , ceramic ball bearings so with a high speed , according to statistics with ceramic ball bearings are generally bearing more than 1.5 times the speed of the speed .

Long life: ceramic balls can not add any grease , which means that even kill grease bearing is able to operate , so as to avoid the occurrence of the bearing grease kill phenomena cause premature failure of the bearings in general , and according to our test some customers . the life of the bearings with ceramic balls after feedback is 2-3 times the normal bearing.

Electromagnetic good insulation performance: using ceramic ball bearings , you can make the insulation between the inner and outer ring of the bearing , because the ceramic ball is an insulator between the inner and outer rings of bearings with ceramic balls , you can achieve the effect of the insulation so that the bearing . can be used in the electrically conductive environment and also prevents the grease inside the bearing and early failure due to ionizing TS .

Rolling the rings , rolling elements , retainer , grease , seals composition, when the rolling ceramic material , which is defined as the rolling bearing ceramic ball bearings.

Hybrid ceramic bearing installation : the installation of good or bad bearings , precision bearings will affect the life and performance. Therefore, please fully research bearing installation, operating standards that follow contain the following items be included bearing installation .

A cleaning bearings and related parts

To have grease lubricated bearings and oil seals or bilateral with dust cover, front seal bearing installation without washing.

Second, the size and finishing the inspection -related parts

Third, the installation method

Bearing installation should be based on the nature of the bearing with the structure, size and bearing components may be, the pressure should be directly added to the ferrule end face of a tight fit too , shall pass through the rolling pressure , bearing installation generally use the following method :

a. press fit

Bearing inner ring and the shaft so that a tight fit , the outer ring and the bearing hole is looser fit , can press the bearings would be pressed onto the shaft , and the shaft together with the bearing into the bearing hole together , when the pressure mounted on the bearing inner side surface, a soft pad assembly casing made ​​of metallic materials (copper or soft steel ) , the inner diameter of the sleeve assembly journal diameter should be slightly larger than the outer diameter slightly smaller than the diameter of the bearing inner ring should avoid pressure on the retainer . Bearing outer ring and bearing bore tight fit when compared to the inner ring and the shaft is a loose fit , the bearing can be pressed into the bearing hole , then assemble the outer diameter of the sleeve should be slightly smaller than the diameter of the housing bore . If the bearing rings and the shaft and the bore is a tight fit to the outer mounting ring and the interior pressed into the shaft and housing bore , the assembly structure of the casing end surface charge can simultaneously be tight inner and outer bearing .

b. heating with

By heating the bearings or bearing, the use of thermal expansion of the tight fit into a loose fit installation method. Is a common and effortless installation. This method is suitable for a large amount of interference bearing mounting , heat installed before or separable bearing the bearing rings into the tank uniform heating 80-100 ℃, then remove from the oil loaded onto the shaft as soon as possible , in order to after cooling to prevent the inner face and shoulder fit is not tight , you can then tighten the axial bearing cooling . When the bearing outer ring and light metal bearing tight fit , using thermal heating bearing installation method , can be avoided with the surface by abrasion . When the tank is heated with a bearing at a certain distance away from the bottom of the gate should network , or hanging hook bearing , the bearing can not be put on the bottom , to avoid heavy impurities into the bearing or uneven heating , the tank must have a thermometer , strictly control the oil temperature does not exceed 100 ℃, in order to prevent tempering effect , reducing the hardness of the ferrule .