Page 6 - needle bearings

TECHNICAL DATA CONTENTS

1. Classification and Characteristics 8. Lubrication ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-40
of Bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A- 4 8.1 Grease lubrication ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-40
8.1.1 Types and properties of grease ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-40
2. Load Rating and Life ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-14 8.1.2 Base oil ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-40
2. 1 Bearing life ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-14 8.1.3 Thickening agent ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-40
2. 2 Basic rated life and basic dynamic load rating ⋯⋯⋯⋯A-14 8.1.4 Additives ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-41
8.1.5 Consistency⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-41
2. 3 Bearing-applied machine and requisite life of bearing ⋯A-14
8.1.6 Grease mixing ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-41
2. 4 Bearing life using adjusted life rating factors ⋯⋯⋯⋯⋯A-15
8.1.7 Grease fill amount ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-41
2.4.1 Reliability adjustment factorЋ1⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-15
8.1.8 Grease replenishing ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-42
2.4.2 Bearing characteristic adjustment factorЋ2 ⋯⋯⋯⋯⋯⋯A-15
8.2 Oil lubrication ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-42
2.4.3 Operating condition adjustment factorЋ3⋯⋯⋯⋯⋯⋯⋯A-16
8.2.1 Lubrication method ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-42
2. 5 Affect on basic dynamic load rating by the hardness of
8.2.2 Lubrication oils⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-43
raceway ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-16
8.2.3 Oiling rate ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-44
2. 6 Life of bearing with oscillating motion ⋯⋯⋯⋯⋯⋯⋯⋯A-16 8.2.4 Lubrication oil replacement cycle⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-44
2. 7 Life of bearing with linear motion ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-17
9. Seals ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-45
2. 8 Various factors influencing bearing life ⋯⋯⋯⋯⋯⋯⋯A-17
9.1 Non-contact seal, contact seal ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-45
2. 9 Mounting deviation and crowning ⋯⋯⋯⋯⋯⋯⋯⋯⋯A-18
9.2 Duplex seal ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-47
2.10 Relation of bearing life to radial internal clearance,
9.3 Clearance setting⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-47
surface roughness and surface hardness ⋯⋯⋯⋯⋯⋯A-19
9.4 NTN seals ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-47
2.11 Basic static load rating ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-19
9.5 Seal materials and operating temperature ⋯⋯⋯⋯⋯⋯A-47
2.12 Allowable static bearing load ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-19
9.6 Seal type and allowable speed ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-47
3. Calculation of Bearing Loads⋯⋯⋯⋯⋯⋯⋯⋯⋯A-20 9.7 Shaft surface hardness ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-48
3.1 Loads acting on shafting ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-20
3.1.1 Loads acting on gears ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-20 10. Bearing Handling⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-49
3.1.2 Loads acting on chain and belt shafts ⋯⋯⋯⋯⋯⋯⋯⋯A-22 10.1 Bearing storage ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-49
3.1.3 Load factor ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-22 10.2 Bearing installation ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-49
3.2 Load distribution to bearing⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-23 10.3 Post-installation running test ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-50
3.3 Mean load ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-25 10.4 Bearing disassembly⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-50
10.5 Required press-fit and pull-out forces ⋯⋯⋯⋯⋯⋯⋯A-51
4. Bearing Accuracy ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-25
10.6 Washing ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-51
5. Bearing Clearance ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-30
11. Technical Data ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-52
5.1 Radial clearance in bearing⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-30
11.1 HL bearing ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-52
5.2 Running clearance ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-30
11.1.1 Basic concept of HL bearing ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-52
5.2.1 Setting up running clearance ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-30
11.1.2 HL surface⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-52
5.2.2 Calculation of running clearance ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-30
11.1.3 Application examples⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-52
5.3 Bearing fit and bearing radial clearance ⋯⋯⋯⋯⋯⋯⋯A-31
11.2 Bearings with solid grease ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-53
6. Bearing Fits ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-32 11.2.1 Features of bearings with solid grease ⋯⋯⋯⋯⋯⋯⋯A-53
6.1 Clamping allowance ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-32 11.2.2 Precautions in use of bearings with solid grease ⋯⋯⋯A-53
6.2 Necessity of proper fit ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-32 11.2.3 Application examples of bearings with solid grease ⋯⋯A-53
6.3 Fit selection ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-32 11.3 Calculation examples ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-54
6.4 Recommended fits ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-33 11.3.1 Shrinkage of drawn-cup needle roller bearing and
post-installation clearance⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-54
6.5 Calculation of clamping allowance ⋯⋯⋯⋯⋯⋯⋯⋯⋯A-35
11.3.2 Track load capacity of cam follower/roller follower⋯⋯⋯A-55
7. Shaft and Housing Design ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-36 11.3.3 Outer ring strength⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-56
7.1 Design of bearing mount ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-36 11.3.4 Stud strength of cam follower ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-56
7.2 Bearing fitting dimensions ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-38
12. Bearing Type Codes and Auxiliary Codes ⋯A-57
7.3 Shaft and housing accuracy ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-39
7.4 Raceway surface accuracy ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-39
7.5 Raceway material and its hardness ⋯⋯⋯⋯⋯⋯⋯⋯⋯A-39
7.6 Allowable bearing misalignment ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-39

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