Ball and Roller Bearings - Ntn-snr.com

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Spherical Roller Bearings B r r D d d Cylindrical bore Tapered bore taper 1:12 d 11201400mm Boundary dimensions Basic load ratings Limiting speeds Bearing numbers dynamic static dynamic static mm kN kgf rpm cylindrical tapered 1 2 d D B r s min C r C or C r C or grease oil bore bore 1120 1,460 250 7.5 9,850 26,700 1,000,000 2,720,000 130 200 239/1120 239/1120K 1,580 345 9.5 15,600 39,000 1,590,000 4,000,000 120 190 230/1120B 230/1120BK 1,580 462 9.5 19,500 52,500 1,990,000 5,350,000 110 160 240/1120B 240/1120BK30 1180 1250 1320 1400 1,540 272 7.5 11,000 29,800 1,120,000 3,050,000 120 180 239/1180 239/1180K 1,630 280 7.5 12,100 33,500 1,230,000 3,400,000 110 160 239/1250 239/1250K 1,720 300 7.5 13,600 38,000 1,390,000 3,900,000 95 150 239/1320 239/1320K 1,820 315 9.5 15,100 43,000 1,540,000 4,400,000 86 130 239/1400 239/1400K 1 "K" indicates bearings have tapered bore with a taper ratio of 1: 12. 2 Smallest allowable dimension for chamfer dimension r. B-250
Spherical Roller Bearings ra Da ra da Equivalent bearing load dynamic PrXFrYFa Fa Fr e Fa e Fr X Y X Y 1 Y1 0.67 Y2 static PorFrYo Fa For values of eY1Y2 and Yo see the table below. Abutment and Constant Axial load factors Mass approx. fillet dimensions mm kg d a D a r as cylindrical tapered min max max e Y 1 Y 2 Y o bore bore 1,156 1,424 6 0.15 4.42 6.58 4.32 1,140 1,100 1,164 1,536 8 0.21 3.29 4.80 3.21 2,160 2,090 1,164 1,536 8 0.27 2.50 3.72 2.44 2,890 2,840 1,216 1,504 6 0.15 4.40 6.55 4.30 1,390 1,340 1,286 1,594 6 0.15 4.42 6.58 4.32 1,600 1,550 1,356 1,684 6 0.16 4.34 6.46 4.24 1,900 1,840 1,444 1,776 8 0.15 4.39 6.54 4.29 2,230 2,160 Note: Please refer to page B-230 for outer ring oil inlet and oil groove dimensions. B-251
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For New Technology Network R corpor
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Warranty NTN warrants, to the origi
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TECHNICAL DATA CONTENTS 1. Classifi
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Classification and Characteristics
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Bearing Selection Select bearing’
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Bearing Selection 2.3 Selection of
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Load Rating and Life 3. Load Rating
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Load Rating and Life where, Lna : A
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Bearing Load Calculation 4. Bearing
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Bearing Load Calculation 4.1.2 Chai
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Bearing Load Calculation 4.4 Equiva
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Bearing Load Calculation 4.5 Allowa
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Bearing Load Calculation Fr2 70 K
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Boundary Dimensions and Bearing Num
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Boundary Dimensions and Bearing Num
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Bearing Tolerances Table 6.3 Tolera
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Bearing Tolerances 6.2 Chamfer meas
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Bearing Tolerances 6.3 Bearing tole
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Bearing Fits 7.3.2 Recommended Fits
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Bearing Fits Table 7.2 (3) Housing
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Bearing Fits Table 7.5 Numeric valu
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Bearing Fits Table 7.6 Fits for inc
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Bearing Internal Clearance and Prel
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Allowable Speed 9. Allowable Speed
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Lubrication 11. Lubrication 11.1 Lu
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Lubrication (1) Base oil Natural mi
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Lubrication 11.4 Solid grease (For
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Lubrication Bearing operating Lubri
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External bearing sealing devices 12
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External bearing sealing devices Ty
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Bearing Materials 13.2 Cage materia
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Shaft and Housing Design 14.2 Beari
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Bearing Handling 15. Bearing Handli
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Bearing Handling a) Installation on
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Bearing Handling 15.4 Post installa
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Bearing Handling Fig. 15.24 shows t
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Bearing Damage and Corrective Measu
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Technical Data Axial displacement m
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Technical Data 17.4 Fitting surface
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A-100
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INDEX OF BEARING TABLES Deep Groove
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Deep Groove Ball Bearings Open type
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Deep Groove Ball Bearings bearing i
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Deep Groove Ball Bearings D D1 rN r
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Deep Groove Ball Bearings Equivalen
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Expansion Compensating Bearings Da
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Miniature and Extra Small Bearings
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Miniature and Extra Small Ball Bear
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Angular Contact Ball Bearings Angul
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Angular Contact Ball Bearings 2. St
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Single and Duplex Arrangements Db r
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High Speed Single and Duplex Arrang
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Ultra-High Speed Angular Contact Ba
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B-67
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Ceramic Ball Angular Contact Ball B
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Four-Point Contact Ball Bearings QJ
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Double Row Angular Contact Ball Bea
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Double Row Angular Contact Ball Bea
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Self-Aligning Ball Bearings B r ra
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Adapters (for self-aligning ball be
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Adapters (for self-aligning ball be
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Cylindrical Roller Bearings Cylindr
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Cylindrical Roller Bearings 2. Stan
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Cylindrical Roller Bearings ra r1a
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L Type Loose Rib B2 B2 r1 r1 B1 d d
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L Type Loose Rib B2 B2 r1 r1 B1 d d
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Multi-Row Cylindrical Roller Bearin
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Four-Row Cylindrical Roller Bearing
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Tapered Roller Bearings Table 1 (co
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Tapered Roller Bearings Inch Tapere
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Tapered Roller Bearings Inch Tapere
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Tapered Roller Bearings Metric syst
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Tapered Roller Bearings Inch system
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Multi-Row Tapered Roller Bearings O
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Page 302 and 303: Multi-Row Tapered Roller Bearings O
Page 310 and 311: Multi-Row Tapered Roller Bearings I
Page 312 and 313: Multi-Row Tapered Roller Bearings I
Page 314 and 315: Four Row Tapered Roller Bearings C2
Page 331 and 332: Spherical Roller Bearings 1. Types,
Page 333 and 334: Spherical Roller Bearings 5. Adapte
Page 335 and 336: Spherical Roller Bearings ra Da ra
Page 351: Spherical Roller Bearings ra Da ra
Page 355 and 356: Adapter (For spherical roller beari
Page 357 and 358: Adapter (For spherical roller beari
Page 359 and 360: Withdrawal Sleeves (For spherical r
Page 367 and 368: Double Row Angular Contact Thrust B
Page 369 and 370: Double Row Angular Contact Thrust B
Page 371 and 372: High Speed Duplex Angular Contact T
Page 373 and 374: High Speed Duplex Angular Contact T
Page 375 and 376: Self-Aligning Roller Thrust Bearing
Page 381 and 382: Locknuts, Lockwashers & Lockplates
Page 383 and 384: Locknuts Reference withdrawal sleev
Page 385 and 386: Locknuts Reference bore no. 3 locko
Page 387 and 388: Nuts Reference withdrawal sleeve no
Page 390 and 391: Lockwashers Series AW ƒ r2 B2 ƒ1
Page 392 and 393: Lockwashers Series AWL ƒ r2 B2 ƒ
Page 394 and 395: Catalog List & Appendix Table
Page 396 and 397: Catalog List CATALOG TITLES CATALOG
Page 398: Appendix Table SI-customary unit co
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