Ball and Roller Bearings - Ntn-snr.com

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Miniature and Extra Small Bearings 2. Standard cage types Pressed cages are standard for these bearings. However, molded resin cages are used for some bearings depending on the application. 3. Dimensional and rotational accuracy The accuracy of miniature and small ball bearings complies with JIS standards. Accuracy standards are listed in the Bearings Accuracy clause on page A-31. Flange accuracies are listed in Table 3. Table 3 Accuracy of outer ring flanges Unitsm Accuracy class Outer diameter dimensional tolerance Outside cylindrical surface runout relative to back face Back face axial runout Width dimension tolerance Width unevenness ∆Dor∆D Above Below S Max. S Max. ∆Cor∆C Above Below VCor VC Max. ISO standard Class 0 Class 6 Class 5 Class 4 (see table below) 8 4 11 7 Identical to same bearing's inner ring VB Identical to same bearing's inner ring VB 5 2.5 Class 2 1.5 3 1 4 1.5 1 Nominal outer diameter, 18 mm or less. Unitsm Flange nominal outer diameter DorD over up to incl. Outer diameter dimensional tolerance Above ∆Dor ∆D Below 10 220 36 10 18 270 43 18 30 330 52 30 50 390 62 B-30
Miniature and Extra Small Bearings 4. Radial internal clearance Radial internal clearance values should be applied as listed in the table regarding the Bearing Internal Clearance and Preload clause on page A-54. However, for miniature and extra small bearings, the radial clearance values for high precision bearings given in Table 4 are applied in many cases. For more specific selection information, please refer to the NTN Miniature and Extra Small Ball Bearings Catalog, or contact NTN Engineering. Table 4 Radial internal clearance for high precision bearings MIL Standard Tight Standard Loose Extra Loose Code C2S CNS CNM CNL C3S C3M C3L Internal Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. clearance 05 38 510 813 1015 1320 2028 Note: 1. These standards are specified in accordance with MIL 23063. However, NTN codes are shown. 2. Clearance values do not include compensation for measuring load. Units m B-31
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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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Page 84 and 85: Bearing Materials 13.2 Cage materia
Page 86 and 87: Shaft and Housing Design 14.2 Beari
Page 88 and 89: Bearing Handling 15. Bearing Handli
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Page 92 and 93: Bearing Handling 15.4 Post installa
Page 94 and 95: Bearing Handling Fig. 15.24 shows t
Page 96 and 97: Bearing Damage and Corrective Measu
Page 98 and 99: Technical Data Axial displacement m
Page 100 and 101: Technical Data 17.4 Fitting surface
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Page 104 and 105: INDEX OF BEARING TABLES Deep Groove
Page 107 and 108: Deep Groove Ball Bearings Open type
Page 109 and 110: Deep Groove Ball Bearings bearing i
Page 111 and 112: Deep Groove Ball Bearings D D1 rN r
Page 123 and 124: Deep Groove Ball Bearings Equivalen
Page 129: Expansion Compensating Bearings Da
Page 134 and 135: Miniature and Extra Small Ball Bear
Page 143 and 144: Angular Contact Ball Bearings Angul
Page 145 and 146: Angular Contact Ball Bearings 2. St
Page 147 and 148: Single and Duplex Arrangements Db r
Page 159 and 160: High Speed Single and Duplex Arrang
Page 167 and 168: Ultra-High Speed Angular Contact Ba
Page 169 and 170: B-67
Page 171 and 172: Ceramic Ball Angular Contact Ball B
Page 173 and 174: Four-Point Contact Ball Bearings QJ
Page 175 and 176: Double Row Angular Contact Ball Bea
Page 177: Double Row Angular Contact Ball Bea
Page 180 and 181: Self-Aligning Ball Bearings B r ra
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Self-Aligning Ball Bearings B r ra
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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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Multi-Row Tapered Roller Bearings I
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Multi-Row Tapered Roller Bearings I
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Four Row Tapered Roller Bearings C2
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Spherical Roller Bearings 1. Types,
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Spherical Roller Bearings 5. Adapte
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Spherical Roller Bearings ra Da ra
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Adapter (For spherical roller beari
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Adapter (For spherical roller beari
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Withdrawal Sleeves (For spherical r
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Double Row Angular Contact Thrust B
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Double Row Angular Contact Thrust B
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High Speed Duplex Angular Contact T
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High Speed Duplex Angular Contact T
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Self-Aligning Roller Thrust Bearing
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Locknuts, Lockwashers & Lockplates
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Locknuts Reference withdrawal sleev
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Locknuts Reference bore no. 3 locko
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Nuts Reference withdrawal sleeve no
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Lockwashers Series AW ƒ r2 B2 ƒ1
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Lockwashers Series AWL ƒ r2 B2 ƒ
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Catalog List & Appendix Table
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Catalog List CATALOG TITLES CATALOG
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Appendix Table SI-customary unit co
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