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Among metric-design tapered roller bearings specified by ISO 355, there are those having new dimensions that are different than the dimension series 3XX used in the past. Part of them are listed in the bearing tables. They conform to the specifications of ISO for the smaller end diameter of the cup and contact angle.
Prefix “H”. H indicates the bearing rings are manufactured from case hardening carbon steel for higher loading and better impact resistance. Advanced Inner Ring. H-E32308J. 40. 90. 35.25. 116000 139000. 4600. 6200. E30218J. 90. 160. 32.5. 204000 261000. 2400. 3200. H-E32009J. 45. 75. 20. 62800. 86500. 5000.
Static equivalent radial load. Larger value of following to be used: Por=0.5Fr+YoFa. Por=Fr. • Values e, Y1, and Yo from table. Fa. Fr. ≦ e. X. Y. 1. 0. Fa. Fr. ＞ e. X. Y. 0.4. Y1. Note: Minus value of load center indicates center is outside cone backface. H-E30202. H-E30302J. E30203J. 32203. E30303J. 32303. E32004J.
H indicates the bearing rings are manufactured from high speed steel for higher loading. Advanced Inner Ring Rib Design Provides. Superior Roller Guidance for Better Efficiencies. Best Material. Best Design. Best Components Support Bearing Performance. Sliding motion between the inner ring flange and the roller end is