| Material: | Chrome Steel |
|---|---|
| Outer Ring: | Gcr15 |
| Inner Ring: | Gcr15 |
|
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Bearing number : 32308
Size (mm) : 40*90*35.5
Brand : JVZ
Bore Diameter (mm) : 40
Outer Diameter (mm) : 90
Width (mm) : 35.5
Mass bearing 1.03kg
The most common material for ball bearing, roller bearing, and tapered roller bearing is chrome SAE 52100 bearing steel. This bearing can be made by high carbon content of 1.5% and has Rockwell hardness of about 64 HRC. Chrome steel bearings can operate at higher temperatures of 120°C, but providing heat treatment to the bearings, their operational temperature exceeds 220°C. Although chrome bearing has excellent wear resistance capability, it is most susceptible to corrosion due to low chromium content. Surface of bearing must be protected from oxidation by giving wear resistance coating or by providing fluid film over it. Stainless steel bearing possess higher chromium content up to 18%, which makes it superior to SAE 52100 when comparing corrosion-resistance behavior. The major disadvantage of stainless steel bearings is that they are low hardness of about 58 HRC and have 20% less overall load-carrying capacity. Stainless steel bearings are even costlier and operate at higher temperatures up to 250°C. The standard composition of SAE 52100 and AISI 52100 bearing steel is incorporated in Table 11.2.
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