LONG LIFE BEARING SERIES

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Laurence Byrd
8 years ago
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1 LONG LIFE BEARING SERIES

2 . Extension of Bearing Life. Mechanism of Flaking FLAKING IN CONTAMINATED LUBRICANT Mechanism Type SURFACE STARTING FLAKING SURFACE FLAKING Abrasion caused by small hard particles Rolling element FLAKING IN CLEAN LUBRICANT BRINELLING INITIATED FLAKING Plastic deformation caused by outside force or caused by large hard particles INSIDE STARTING FLAKING Material defect of maximum shear stress Long Life Bearings,,MF,,,CH. Koyo Long Life Bearing Series LONG LIFE IN CLEAN LUBRICANT IN CONTAMINATED LUBRICANT MATERIAL HEAT TREATMENT DESIGN High Refining Special Heat Treated Bearings MF Sealed Bearings Greater Toughness New HI-CAP Tapered Roller Bearings Medium Heat Resistant CH Carburized Steel for Large Size Bearings

CLEAN LUBRICANT BRINELLING INITIATED FLAKING Plastic deformation caused by outside force or caused by large hard particles INSIDE STARTING FLAKING Material defect of maximum shear

3 . Bearing Life Evaluation Results Against Flaking in Clean lubricant ESR steel VAR steel Life ratio (Actual / Calculation) In Clean lubricant SUJ Life, h 000 Lubricant ASTO 0 Test temp. SUJ -S -S CH In Clean lubricant SNCM8 CH L L CH 97 9 SNCM Life, Rev. and Life in contaminated lubricant, : times Hardness Mean particle size Amount 0. g/r 0. g/r HV 7 700HV Life in clean lubricant : times : Dent area ratio, % 80 0 Dent resistance : 8 times or more : times or more Dent area ratio measured at 0 points of inner ring raceway center and analyzed by computor Test hour, h 00

and Life in contaminated lubricant, : times Hardness Mean particle size Amount 0. g/r 0.

4 . Bearing Types and Performance R LONG LIFE BEARINGS MATERIAL CHARACTERISTICS AND EFFECTS PERFORMANCE (Compared with Bearings) Life in clean lubricant Life in contaminated lubricant APPLICABLE BEARINGS Ball Brg. Cylindrical Tapered Spherical Needle APPLICATIONS (High Refining ) Steel (SUJ) Equivalent to special remelting steel Long life by minimizing inclusions with treatment is more better times Same For Automobile (Greater Toughness ) (Medium Heat Resistant ) Steel Significant toughness and matrix strength by controlling alloy element High resistance against hardness reduction by tempering times 7 times (at ) Extra long life under heavy load For Continously casting equipment For Tarbocharger CH (Carburized Steel for Large Size Bearings) Carburized Steel High resistance against hardness reduction by tempering Controlled alloy element times For Steel rolling mill (Special Heat Treated Bearings) (New HI-CAP Tapered Roller Bearings) Steel Carburized Steel High surface hardness Adequate resistance to wear High surface hardness Controlled retained austenite times times times In contaminated lubricant such as differential and transmission Applications Continously casting equipment Steel rolling mill Tarbocharger Transmission

Cylindrical Tapered Spherical Needle APPLICATIONS (High Refining ) Steel (SUJ) Equivalent to special remelting steel Long life by minimizing inclusions with treatment is more better times Same For

5 . Life Comparison LIFE RATIO IN CLEAN LUBRICANT IN CONTAMINATED LUBRICANT Notes: ) Case carburized steel. Others are through hardened steel ) Only inner ring is ) Inner ring, outer ring and rolling elements are ) ) ) ) STD KUJ7 CH ALL MF 7 VALUE & TECHNOLOGY

Others are through hardened steel ) Only inner ring is ) Inner

Roller bearing life. The Reaction of AISI 52100 Bearing Steel to Heat

Roller bearing life. The Reaction of AISI 52100 Bearing Steel to Heat Roller bearing life in high temperatures A common question maintenance personnel ask bearing companies when their equipment temperature is high or rises is, What is the maximum temperature that your rolling