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ROLLER BEARINGS

ROLLER BEARINGS
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T C D B d a • Bii TIMKEN PRODUCTS CATALOG • • • ii TIMKEN SERVICE CATALOG • • • B B ROLLER BEARINGS

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• B TIMKEN PRODUCTS CATALOG B ROLLER BEARINGS

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• TIMKEN PRODUCTS CATALOG B Part Numbering Systems B How to recognize your part number The part numbering systems for single-row tapered roller bearings (type TS) are internationally recognized. Several part number systems have been developed that can be classified according to “metric” or “inch” systems. Within both the metric and inch systems, different part number systems have been developed. Inch system bearings are normally assigned individual part numbers for the inner race and outer races, whereas ISO bearings are assigned a unique part number for the bearing assembly (inner race and...

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• B TIMKEN PRODUCTS CATALOG Roller Bearings B A new inch part numbering system was developed by the American Bearing Manufacturers Association (ABMA) to address the expansion in the number of new applications and tapered roller bearing designs. This part numbering system has become the international standard for inch-sized bearings. The ABMA part numbering system applies to new bearing seriesonly. Existing part numbers according to the original system, new part numbers that are added to the existing series and proprietary part numbers of special bearings continue to be used. The new part...

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• TIMKEN PRODUCTS CATALOG B Part Numbering Systems B A Inner race & Outer race Standard basic series part number. A Inner race Different radius from basic part number. A Inner race Different bore from basic part number. A Inner race Different complement of rollers. A Outer race Different O.D. from basic part number. A Outer race Different radius from basic part number. A Outer race Different width from basic part number. AA Inner race & Outer race Different bore, O.D., width or radius from basic part number. AB Inner race Different bore, width or radius from basic part number, assembled...

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• B TIMKEN PRODUCTS CATALOG Roller Bearings B CP Inner race & outer race Flash chrome plated. Otherwise, interchangeable with basic part number CP Inner race & outer race Envelope dimensions same as basic part number, different internal geometry, customized for performance. CR Inner race & outer race Ribbed outer race bearing series. CS Inner race & outer race Dimensionally different from basic part number. (Non-interchangeable.) CX Inner race Dimensionally different from basic part number. (Non-interchangeable.) D Inner race & outer race Double inner race or Double outer race....

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• TIMKEN PRODUCTS CATALOG B Part Numbering Systems B basic part numbers. ED Outer race Double outer races. (Non-interchangeable with other outer races identified with same basic part numbers.) EDC Outer race Double outer races, special hole in O.D. for locking pin. EE Inner race Large and small ribs - close guided rollers. (Non-interchangeable with other inner races identified with same basic part numbers.) EH Inner race & outer race Extra heavy series. EL Inner race & Outer race Extra light series. EX Inner race & outer race Experimental. EXX Inner race & outer race Inner races or outer...

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• B TIMKEN PRODUCTS CATALOG Roller Bearings B LA Inner race Inner race assembled with Duo-Face-Plus seal. LA, LB, Seal These suffixes are used on a basic Duo-Face-Plus seal number to identify the assembly LC, etc. resulting from the use of the seal with various inner races in the series. LL Inner race & outer race Light-Light series. LM Inner race & outer race Light-Medium series. M Inner race & outer race Medium series. M Inner race & outer race Through hardened components, DIN 720 Part Numbers, IsoClass Part Numbers N Inner race Bock or Gilliam type bearings. NA NA Inner race Two inner...

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• TIMKEN PRODUCTS CATALOG B Part Numbering Systems B SX Outer race Special feature bearing. (Non-interchangeable with bearings having same basic part numbers.) T Race Thrust bearing assemblies. T Outer race Double outer race with heavy section. May have unusual feature such as flange, tapered O.D., etc. T Inner race Tapered bore. T Outer race Tapered O.D. TA Inner race Tapered bore ‘NA’ type inner race. TA Outer race Tapered O.D. TB Inner race Tapered bore inner race with brass cage. TC Race Thrust bearing assembly. TC Inner race Tapered bore. TD Inner race Double with tapered bore. TDB...

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• B10 TIMKEN PRODUCTS CATALOG Roller Bearings B WXX Inner race & Outer race Slot(s) or keyway(s). Made of special steel. X Inner race ISO part number. X Inner race Slot(s) or keyway(s). X Inner race & Outer race Special feature bearing. (Non-interchangable with bearings having the same basic part number.) X Inner race & Outer race ISO bearing with same boundary dimensions as basic part number but with different internal geometry, yielding increased rating. XA Inner race & Outer race Special feature bearing. (Non-interchangeable with bearings having the same basic part number.) XAA Inner...

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• TIMKEN PRODUCTS CATALOG B11 Part Numbering Systems B Metric part numbering systems J-Line part numbers The “J” prefix letter is used in conjunction with the ABMA part numbering system to identify metric dimensioned and toleranced inner race and outer races. The bearing series designation does not contain the prefix letter “J”. J-Line bearings are referred to as inch bearings in metric bore, O.D. and width. ISO Part Numbering System The original metric part numbering system for tapered roller bearings was based on the ISO 15 dimensional plan for radialbearings. A 5-digit part number...

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• B12 TIMKEN PRODUCTS CATALOG Roller Bearings B New ISO 355 part numbering system Finding that tapered roller bearings did not conform to the ISO 15 general plan, because dimensions given were not found to be optimal, the ISO introduced a new numbering system for tapered roller bearings in ISO 355. This system uses 3 alpha-numeric fields to define the bearing series. The bearing part number is then defined by adding the inner race diameter in mm after the bearing series. Although all original metric part numbers were assigned a new designation in the ISO 355 plan, the original part number...

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