MRC Engineering Handbook

MRC Engineering Handbook MRC Engineering Handbook Table of contents Section 1 – Introduction page MRC history.................................................................................4 Catalog and speed rating disclaimer ..............................................................5 Warranty statement ..........................................................................5 Identification system ..........................................................................6 Bearing symbols .............................................................................7 Identification of non-standard variants ...........................................................24 Descriptive manufacturing suffixes ..............................................................27 Telephone and fax numbers....................................................................29 Section 2 – Bearing specification tables page Bearing types summary chart ..................................................................32 Single-row deep groove, type S .................................................................36 Single-row deep groove cartridge type SFFC .......................................................46 Single-row deep groove, type S hybrid ............................................................49 Single-row maximum capacity, filling notch, type M ..................................................63 Self-aligning ball bearings .....................................................................71 Double-row angular contact, 5000 series..........................................................89 Single-row 15° angular contact, type R ..........................................................109 Single-row 15° angular contact, type XLS ........................................................120 Single-row 29° angular contact, 7000 series . .127 Single-row 40° angular contact, 7000P series .....................................................141 Single-row 40° angular contact, 7000PJ series ....................................................153 PumPac 8000, 8000BB and 8000AAB series ......................................................163 Single-row 29° angular contact, split ring, 9000U series .............................................173 Single-row 40° angular contact, split ring, 9000UP series . .177 Duplex 29° angular contact 97000U series........................................................183 Duplex 40° angular contact 97000UP series ......................................................186 Precision ABEC-5 and ABEC-7 bearings ..........................................................193 Single-row 15° angular contact, type R ........................................................194 Single-row deep groove, type S, woodworking bearings............................................202 Ball screw support bearings .................................................................203 Specialty bearings ..........................................................................205 Adapter type.............................................................................206 Dynamometer ...........................................................................207 Electric motor quality/ABMA cross reference ....................................................209 Felt seal replacement ......................................................................224 Mast guide ..............................................................................228 Wide inner ring...........................................................................231 1 MRC Engineering Handbook Table of contents Section 3 – Engineering data page Duplex bearings .............................................................................240 97000 series .............................................................................243 ABEC tolerances .............................................................................245 Shaft and housing fits.........................................................................251 Internal radial clearance .......................................................................268 Dynamic and static load ratings .................................................................269 Bearing life .................................................................................270 Speed factors ...............................................................................271 Speed ratings ...............................................................................272 Materials and limitations ......................................................................275 Lubrication .................................................................................279 Vibration data...............................................................................297 Snap-ring data ..............................................................................319 Lock nuts, lock washers and lock plates............................................................323 Lock nut torque and clamping force ..............................................................326 Installation procedures ........................................................................327 Shaft and housing shoulder diameters ............................................................334 Millimeter-inch equivalents ....................................................................338 Fraction-decimal equivalents ...................................................................340 Metric conversion factors ......................................................................341 Useful formulas .............................................................................344 Product index ...............................................................................367 Section 4 – Marathon corrosion-resistant housings and bearings 375 Section 5 – Made-to-order program 381 2 Bearing Introduction Engineering data Marathon series Made-to-order specification tables Introduction Section 1-Introduction 1 Table of contents page MRC history...................................................................... 4 Catalog and speed rating disclaimer ................................................... 5 Warranty statement ............................................................... 5 Identification system ............................................................... 6 Bearing symbols .................................................................. 7 Identification of non-standard variants ................................................ 24 Descriptive manufacturing suffixes ................................................... 27 Telephone and fax numbers......................................................... 29 3 MRC® history The historical perspective corporated in 1909 as the U.S. Ball Bearing The manufacturing experience, technical of MRC Manufacturing Company. Axel Strom became background, and managerial skills of these sole owner and changed the name to Strom antecedent companies provided Marlin Rock- MRC is the outgrowth of three of America’s Ball Bearing Manufacturing Company. The well with a firm base out of which to develop oldest bearing companies—Standard Roller company established itself as a major supplier and grow. In 1953, a new state-of-the-art Bearing Company, Gurney Ball Bearing Com- of precision ball bearings to the automotive plant was built at Falconer, New York, and an pany, and Strom Bearing Company. and machinery industries. A major innovation addition to the plant was completed in 1966. The Standard Roller Bearing Company by Strom was engineering service, provided The plant was devoted to the manufacture of was formed when a Philadelphia industrialist, to customers, “to aid in proper choice of ball high-precision ball and roller bearings. S. S. Eveland, merged the Ball Bearing Com- bearings, their use, and guidance for mount- In 1964, Marlin Rockwell Corporation pany of Boston with seven other major ball ing and maintenance.” was merged with TRW, Incorporated, and bearing and ball-making equipment manu- Prior to World War I, Albert F. Rockwell, renamed TRW Bearings Division in 1979. facturers. The company used the SRB Dia- one of two brothers who founded New De- With the technological background and facili- mond trademark. SRB made many contribu- parture Company, formed the Rockwell- ties of the parent company at its disposal, tions to the advancement of anti-friction Drake Corporation to manufacture ball bear- TRW Bearings Division entered a new period bearings; most notably, the development of ings in Plainville, Connecticut. During the war, of growth. A ball manufacturing plant was 52100 steel, a high carbon, high chrome alloy Rockwell combined Rockwell-Drake Corpora- acquired in 1964 at Winstead, Connecticut. steel that greatly improved bearing life. tion with several other corporations including In 1976, the Division built a new facility at In 1902, Frederick W. Gurney started the the Standard Roller Bearing Company of Gainesville, Georgia, to specialize in high- manufacture of ball bearing machinery in Philadelphia. volume bearing production. Jamestown, New York. He originated the After World War I, some of the manufac- In 1986, the Bearing Division was acquired Gurney “radial-thrust angular-contact” turing units were liquidated and the company by the SKF Group, which is an international bearing (today’s 7000 Series) in 1905, and was reorganized as Standard Steel and manufacturing and marketing organization the

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