treatment code 4t et e f h m 5s hl 4t tapered roller bearings et tapered roller ... bearings carburized alloy steel bearings stainless steel bearings high speed ... steel bearings plated bearings ceramic rolling element bearings hl ... high lubrication roller bearings bearing series code basic numbers ... code 1 contact angle deep groove ball bearings type code 6 68 69 60 62 63 78 79 70 72 ... 560 2,360 2,500 angular contact ball bearings a standard contact angle 30° b standard ... angle 40° c standard contact angle 15° tapered roller bearings b contact angle over 10 ... ° to/including 32° angular contact ball bearings type code 7 self-aligning ball bearings ... temperature use to 250°c cylindrical roller bearings type code nu n nf nnu nn etc ...
common cause of fatigue cracking in bearings is the inclusion of non-metallic ... impurities in the steel by using pure materials low in these ... the bearing is lengthened for all ntn bearings steel low in oxygen content and non- ... as outside hearth smelting is used for bearings requiring especially high reliability ... and long life steels of even higher in purity such as vacuum ... smelted steel vim var cevm and electro-slag melted ... steel esr are used 1 high/mid carbon alloy ... steel in general steel varieties which can be hardened not ... the raceways and rolling elements of bearings foremost among these is high carbon ... chromium bearing steel which is widely used for large type ... bearings and bearings with large cross sectional dimensions ... induction hardened bearing steel incorporating manganese or molybdenum ...