Needle Roller Bearings - Ntn-snr.com

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Technical Data NTN 11.3.3 Outer ring strength Generally any outer ring never breaks down as long as the load acting it is a usual operating load. This paragraph describes hereunder the strength calculation method to be used when the outer ring strength under shock load and heavy load is reviewed. The outer ring strength can be determined using the formula given hereunder, assuming the respective outer ring profiles as illustrated in Fig. 11.6. In this case, the outer ring rupture strength means the bridged rupture strength of roller. 11.3.4 Stud strength of cam follower Fr Shaft section view R A Fig. 11.7 h2 h2 h Centroid D2h D h KR,KRV,NATR,NATV Fig. 11.6 NUKR,NUTR Centroid D2h D When load Fr acts on the center point of outer ring as illustrated in Fig.11.7, bending moment FrRgenerates and consequently bending stress 1 (deemed as tensile stress) acts on the stud surface. In addition to this bending stress, tensile stress 2 generates from screw tightening because the stud itself is clamped to machine body with nuts. The stud strength can be reviewed from comparison of the sum (1 + 2) of these two tensile stresses with allowable stress for the stud material. Regarding how to set up breaking stress, in general 1760MPa (180kg/mm 2 ) can be set up as the breaking stress for bearing steel, but it is desirable to set up the breaking strength with safety-side value (1170MPa [120kgf/mm 2 ]), where stress concentration is taken into account. Generally any outer ring never break down as long as the load acting on it is usual operating load, but it necessary to check the rupture structure of outer ring, where shock load and heavy load act on it. 4 D2h PI 1f hD2h 2 2 Where, sin1cos f 2cos rad. Z P Breaking load (N) I Secondary moment of outer ring section (mm 4 ) Z Number of rollers Breaking stress (MPa) Dhh2per Fig. 11.6 (mm) 12 FrR 1 Z Fr Maximum radial load Z Coefficient of shaft section through Point-A 298MPa (10kgf/mm 2 ) Tensile stress generating from maximum tightening torque described in "Dimensions Table" Allowable stress for material The following values are adopted from the repeated bending test result of the stud material. Where the stud material is subjected to static bending stress; 1372MPa (140kgf/mm 2 ) Where the stud material is subjected to repeated bending stress (single direction) 784MPa (80kgf/mm 2 ) Where the stud material is subjected to repeated bending stress (double directions) 392MPa (40kgf/mm 2 ) Accordingly, Z Fr2 R A-56
Bearing Type Symbols and Auxiliary Symbols NTN 12. Bearing Type Symbols and Auxiliary Symbols Table 12.1 Bearing Type Symbols Type code Bearing type Type code Bearing type 811 812 893 A AS11 ARN AXK11 AXN BF BK BR CRV DCL F FF FR FRIS G GD GK GS811 GS812 GS893 HCK HF HFL HK HMK IR JFS JPUS K K811 K812 K893 KBK KD KH KLM KLMS KLMP KR KRU KRV KRVU Single-direction thrust cylindrical roller bearing, dimension series 11 Single-direction thrust cylindrical roller bearing, dimension series 12 Single-direction thrust cylindrical roller bearing, dimension series 93 Needle roller, spherical type Steel plate thrust washer, dimension series 11 Needle roller bearing with double-direction thrust cylindrical roller bearing Thrust needle roller bearing, dimension series 11 Needle roller bearing with double-direction thrust needle roller bearing Metallic flat cage for linear flat rollers Drawn cup needle roller bearing with close end Snap ring for bearing housing Full complement roller for cam follower, inch series Drawn cup needle roller bearing with open end, inch series Needle roller, plane type Linear flat roller Bottom roller, for drawing frame (textile machine) Bottom roller Synthetic rubber seal, one-lip type Synthetic rubber seal, double-lip type Needle rollers with split type cage Outer ring for thrust bearing, dimension series 11 Outer ring for thrust bearing, dimension series 12 Outer ring for thrust bearing, dimension series 93 Drawn cup needle roller bearing for cross joint One-way clutch One-way clutch integral with bearing Drawn cup needle roller bearing with open end Drawn cup needle roller bearing with open end, for heavy load application Inner ring Arms for tension pulley and jockey pulley Tension pulley and jockey pulley Needle rollers with cage Thrust cylindrical roller, dimension series 11 Thrust cylindrical roller, dimension series 12 Thrust cylindrical roller, dimension series 93 Needle roller and cage assembly for small ends Linear ball bearing, stroking type Linear ball bearing, drawn cup type Linear ball bearing, machined ring type Linear ball bearing, clearance-adjustable type Linear ball bearing, open type Cam follower Cam follower, shaft eccentric type Cam follower, full complement roller type Cam follower, full complement roller and shaft eccentric type MI MR NA22 NA48 NA49 NA59 NA69 NA49S NAO NATR NATV NIP NK NKIA59 NKIB59 NKX NKXZ NKXR NKXRZ NUKR NUTR2 NUTR33 NUTW PK RF RLM RNA22 RNA48 RNA49 RNA59 RNA69 RNA49S RNAB2 RNAO WR WS811 WS812 WS893 Inner ring, inch series Machined ring needle roller bearing without inner ring, inch series Roller follower with inner ring, dimension series 22 Machined ring needle roller bearing with inner ring, dimension series 48 Machined ring needle roller bearing with inner ring, dimension series 49 Machined ring needle roller bearing with inner ring, dimension series 59 Machined ring needle roller bearing with inner ring, dimension series 69 Clearance-adjustable needle roller bearing with inner ring Machined ring needle roller bearing, separable type, with inner ring Roller follower Roller follower, full complement roller type Grease nipple Machined ring needle roller bearing without inner ring Complex bearing : Needle roller bearing with angular ball bearing dimension series 59 Complex bearing Needle roller bearing with three-point contact type ball bearing dimension series 59 Complex bearing : needle roller bearing with thrust ball bearing without dust-proof cover Complex bearing: Needle roller bearing with thrust ball bearing with dust-proof cover Complex bearing: Needle roller bearing with thrust cylindrical roller bearing without dust-proof cover Complex bearing: Needle roller bearing with thrust cylindrical roller bearing with dust-proof cover Cam follower, full complement roller type Roller follower, diameter series 2 Roller follower, diameter series 3 Roller follower outer ring, middle rib type Needle roller and cage assembly Polyamide resin cage for linear flat rollers Linear roller bearing Roller follower without inner ring, dimension series 22 Machined ring needle roller bearing without inner ring, dimension series 48 Machined ring needle roller bearing without inner ring, dimension series 49 Machined ring needle roller bearing without inner ring, dimension series 59 Machined ring needle roller bearing without inner ring, dimension series 69 Clearance-adjustable needle roller bearing, without inner ring Open type roller follower without inner ring, diameter series 2 Machined ring needle roller bearing, separable type, without inner ring Snap ring for shaft Thrust inner ring, dimension series 11 Thrust inner ring, dimension series 12 Thrust inner ring, dimension series 93 A-57
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For New Technology Network R corpor
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Technical Data A-001058 Needle roll
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Needle Roller Bearings
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DIMENSIONAL DATA CONTENTS Needle Ro
Page 9 and 10: Classification and Characteristics
Page 19 and 20: Load Rating and Life NTN Table 2.1
Page 21 and 22: Load Rating and Life NTN When the o
Page 23 and 24: Load Rating and Life NTN 2.10 Radia
Page 25 and 26: Calculation of Bearing Loads NTN (2
Page 27 and 28: Calculation of Bearing Loads NTN 3.
Page 29 and 30: Bearing Accuracy NTN 4. Bearing Acc
Page 31 and 32: A-27 Bearing Accuracy NTN 7 7 8 8 8
Page 33 and 34: Bearing Accuracy NTN Table 4.5 Allo
Page 35 and 36: Bearing Internal Clearance NTN 5.2.
Page 37 and 38: Bearing Fits NTN 6.4 Recommended Fi
Page 39 and 40: Bearing Fits NTN 6.5 Interference C
Page 41 and 42: Shaft Bearing and Fits Housing Desi
Page 43 and 44: Shaft Bearing and Fits Housing Desi
Page 45 and 46: Lubrication NTN Table 8.2 Grease va
Page 47 and 48: Lubrication NTN (4) Circulating lub
Page 49 and 50: Sealing Devices NTN 9. Sealing Devi
Page 51 and 52: Sealing Devices NTN 9.2 Combined se
Page 53 and 54: Bearing Handling NTN 10. Bearing Ha
Page 55 and 56: Bearing Handling NTN the bearing fi
Page 57 and 58: Technical Data NTN 11.2 Bearings wi
Page 59: Technical Data NTN expressed in the
Page 63 and 64: Needle roller and cage assemblies B
Page 65 and 66: Needle Roller and Cage Assemblies
Page 67 and 68: Needle roller and cage assemblies N
Page 81 and 82: Cage and roller type needle roller
Page 83 and 84: Needle Roller and Cage Assemblies f
Page 85 and 86: Needle roller and cage assemblies f
Page 91 and 92: Drawn Cup Needle Roller Bearings
Page 93 and 94: Drawn cup needle roller bearings NT
Page 107 and 108: Drawn cup needle roller bearings se
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Drawn cup needle roller bearings NT
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Drawn cup needle roller bearings NT
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Machined Ring Needle Roller Bearing
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Machined ring needle roller bearing
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Machined-ring needle roller bearing
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Machined Ring Needle Roller Bearing
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Inner Rings
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Inner rings NTN Type IR d 510mm Bou
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Inner rings NTN d 1520mm Boundary d
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Inner rings NTN d 80100mm Boundary
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Inner rings NTN d 170380mm Boundary
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Inner rings NTN Inch series Type MI
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Inner rings NTN d 101.600203.200mm
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Adjustable-Clearance Needle Roller
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Clearance-adjustable needle roller
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Clearance-adjustable needle roller
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Complex Bearings
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Complex bearings NTN Bearing compon
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Complex bearings NTN B-143
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Needle roller bearings with thrust
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Needle roller bearings with angular
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Needle roller bearings with three-p
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Needle roller bearings with double-
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Needle roller bearings with double-
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Roller Followers / Cam Followers
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Roller followers: Yoke-type track r
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Roller followers : Yoke type truck
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Cam followers stud type truck rolle
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Thrust Roller Bearings
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Thrust roller bearings NTN Bearing
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Thrust roller bearings NTN B-209
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Thrust needle roller bearings NTN B
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Thrust needle roller bearings NTN B
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Thrust cylindrical roller bearing N
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COMPONENTS Needle Rollers/Snap Ring
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Needle rollers NTN Application of n
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Needle rollers NTN DW 4.55mm Bounda
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Snap rings NTN For shaft Type WR Be
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Snap rings NTN For housing Type BR
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Snap rings NTN Bearing numbers Boun
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Seals NTN Type G Type GD Type G Typ
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LINEAR BALL BEARINGS: Solid, Drawn
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Linear Ball Bearings NTN Components
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Linear Ball Bearings NTN Components
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Solid type linear ball bearings NTN
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Machined cup linear ball bearings N
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Linear ball bearings, stroke type N
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Machined ring linear ball bearings
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Linear flat rollers NTN Stopper Fig
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Linear flat rollers NTN Type BF Typ
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Linear roller bearings NTN Type RLM
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One-way Clutches Tension Pulleys, B
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One-way clutches NTN Shaft and hous
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One-way clutch miniature type NTN T
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Bottom roller bearings NTN Type FRI
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Bottom roller bearings NTN Type FRI
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Tensioner pulleys for textile machi
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Contents of Appendix Approximate co
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Appendix NTN ˚C-˚F temperature co
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C-5 Appendix NTN Standard ball Hult
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Appendix NTN Unit system Quantity P
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Appendix NTN Viscosity conversion t
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Appendix NTN Ordinary tolerance for
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Appendix NTN High Low Hig
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Appendix NTN H7 H8 H9 H10 H11 H13 J
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