Needle Roller Bearings - NSK Ltd.

1 Needle Roller Bearings NSK Needle BEARING. TECHNICAL A6 . INFORMATION. Cage & Needle Roller FWJ. FWF FWF---W. FBN. FBN---W B4 . WJC. Assemblies WJ. Drawn Cup Needle F . FH. NFH. MF MFH. FJ . FJL FJH. MFJ . MFJH. MFJL Y. YH MFY. FJT FJTT. FJLT FJLTT. MFJT FJP. B36 . M MH MFJLT JP. Roller Bearings B BH J JH DB MJ MJH DD FJHTT. RNA48 NA48. Solid Needle Roller RNA49. RNA59. NA49. NA59 B88 . Bearings RNA69. HJ RLM RNAF RNAFW RNA---TT. NA69. HJ+IR LM NAF NAFW NA---TT. Inner Rings for Needle FIR. IR B128 . IR. Roller Bearings FNTA FTRA FTRB FTRC FTRD FTRE. thrust Bearings NTA. FB FG FH. TRA TRB TRC TRD TRE. TRF B162 . FCR FCRS. Cam Followers FCJ. CR. FCJS. CRS. B176 . FYCR FYCRS. Roller Followers FYCJ. YCR.

2 FYCJS. YCRS. B190 . Needle Rollers A F P T C M B198 . Spherical Plain FSF FSBB. B208 . SF SBB. Bearings Needle Roller Bearings ZY NSA B220 . for Universal Joints Drawn Cup Roller FC RC FCB RCB B228 . Clutches Oil Seals for Needle VC KC B238 . Roller Bearings Example Figures and C1 . Appendices Introduction Newly Revised & Updated NSK Needle Roller Bearing Catalog Welcome to the latest edition of the NSK Needle Roller Bearing catalog (Catalog No. E1419c). Our new catalog has been revised and updated to better meet the needs of our customers. NSK Needle Roller Bearings enjoy a favorable reputation and are well accepted in the industrial machinery marketplace. NSK will continue to meet the future needs of industry by further developing automation-related products that are more compact, lightweight, consume less energy, and offer extended maintenance-free performance.

3 This newly revised NSK Needle Roller bearing catalog has been enhanced with a wealth of information that spans many years of amassing empirical data from many sources around the world. We are convinced that this catalog will prove to be more helpful to you in selecting the optimum bearing for your application. Choose the optimal NSK Needle Roller bearing for your application from among the types and features offered in this catalog. Please feel free to contact us with any feedback, comments or suggestions you may have. Needle Roller Bearings NSK Needle BEARING NSK Needle BEARING. CONTENTS. TECHNICAL INFORMATION Page 5. Shaft and Housing A30 BEARING TABLES Page EXAMPLE FIGURES Page Fitting .. A30.

4 1. Bearing Types and A06 Accuracy and A34 Cage & Needle Roller Assemblies .. B004 Motor Vehicles .. C02. Cage & Needle Roller Assemblies .. A06 Materials and Heat Treatment of Drawn Cup Needle Roller Bearings .. B036 Construction and Cargo Handling Drawn Cup Needle Roller A06 Raceway A35 Solid Needle Roller Bearings .. B088 C09. Solid Needle Roller A08 Abutment and Fillet A35 Inner Rings for Needle Roller Bearings .. B128 Agricultural Machinery .. C19. thrust Bearings .. A08 6. Lubrication and Lubricating Methods .. A37 thrust B162 Machine C20. Cam Followers and Roller Followers A09 Friction and Lubrication .. A37 Cam Followers .. B176 Business Machines .. C26. Needle Rollers .. A09 Lubricants.

5 A37 Roller B190 Electric and Pneumatic Equipment .. C30. Spherical Plain Bearings .. A10 Lubricating A41 Needle B198 Two-Stroke Engines .. C39. Needle Roller Bearings for Universal Spherical Plain B208 Hydraulic Machines .. C41. Joints .. A10 7. Bearing A43 Needle Roller Bearings for Universal Joints .. B220 Others .. C44. Drawn Cup Roller A11 Oil Seals .. A43 Drawn Cup Roller Clutches .. B228. Oil A43 Oil Seals for Needle Bearings .. B238. 2. Bearing Life and Basic Load Rating .. A12 Flingers (Slingers).. A44. Bearing Life .. A12 Labyrinth Seals .. A44. Basic Dynamic Load A12. Life A13 8. Bearing A45. Static Load Rating .. A15 Precautions for Proper Handling of APPENDICES. Maximum Permissible Load of Drawn Bearings .

6 A45. Cup Needle Roller Bearings , Pmax .. A16 Mounting .. A45 Appendix 1 Conversion Table from SI. Insertion and Removal Force .. A46 (International Units) System .. C48. 3. Bearing A17 Operating Inspection .. A47 Appendix 2 N-kgf Conversion Table .. C50. Equivalent A17 Dismounting .. A47 Appendix 3 kg-lb Conversion Table .. C51. Calculation of Bearing Loads .. A17 Cleaning .. A48 Appendix 4 C- F Conversion C52. Average Load .. A18 Appendix 5 Viscosity Conversion Table .. C53. Appendix 6 Inch-mm Conversion Table .. C54. 4. Bearing Selection .. A20 Appendix 7 Hardness Conversion Table (Reference).. C56. Bearing Types .. A20 Appendix 8 Physical and Mechanical Properties of Machinery in which Bearings are Materials.

7 C57. Used and Projected Life .. A22 Appendix 9 Tolerances for Shaft Diameters .. C58. Limiting A22 Appendix 10 Tolerances for Housing Bore Diameters .. C60. Internal Clearance of Appendix 11 Values of Standard Tolerance Grades C62. Rolling A23 Appendix 12 Speed Factor fn .. C64. Bearing Accuracy .. A25 Appendix 13 Fatigue Life Factor fh and Fatigue Life L Lh .. C65. Appendix 14 Boundary Dimensions of Radial C66. Appendix 15 Boundary Dimensions of thrust C67. A4 A5. NSK Needle BEARING NSK Needle BEARING. 1. Bearing Types and Features Needle Roller Bearings are a type of Roller 2. The outside surface of the cage serves as a 7. Mounting is made easier because press 11. Among full complement Roller Bearings , Bearings and are classified as either radial or guide face and helps create favorable fitting can be performed with an arbor press Bearings whose rollers are held in place by thrust depending on the direction of the load lubricating conditions.

8 Or the like. grease before assembly have the maximum they support. Needle Roller Bearings include 3. The cage guides the rollers accurately to 8. Lubricating the bearing is easy and a load capacity because the rollers have the Bearings whose rollers slightly exceed the size ensure that stable Roller movement is lubrication hole can also be provided upon longest possible length. range of Needle rollers as stipulated by ISO. maintained. request. 12. The cage of the Needle bearing accurately Needle Roller Bearings include drawn cup 4. The single-piece cage has high strength 9. If a closed type is used at the shaft end, guides the rollers at the pitch diameter of and solid radial Bearings , as well as and rigidity and facilitates the free savings can be made on the housing end the rollers.

9 The surface of the cage is application-specific cam followers, Roller circulation of lubricant. cover. hardened to reduce frictional torque and followers. thrust Bearings include thrust Needle 5. High load capacity is possible due to the 10. The full complement Roller bearing carries increase rigidity and wear resistance. Bearings . Although not classified as a rolling presence of many rollers of relatively long the load on many rollers and thus 13. The unique structure of the cage allows bearing, there is also a spherical sliding length. maximizes load capacity. extensive space for storing lubricant, thus bearing that supports radial and axial loads. 6. To prevent stress concentrations on both enabling smooth lubricant circulation and This catalog presents the various types of ends of the rollers (edge loads), appropriate increasing grease life.

10 Needle Bearings and their features. For easy crowning is applied. reference, the numbers in each section from through correspond to the numbers in Drawn Cup Needle Roller Bearings Figs. through 1. NSK drawn cup Needle Roller Bearings are Cage & Needle Roller Assemblies available in two types: caged and full complement. Drawn cup outer rings are 1. The cage has a unique structure that made of carefully selected alloy steel sheet. facilitates handling by holding the rollers They are surface-hardened after precise securely in place. pressing, giving them a unique structure. 2. The outer ring is precisely pressed and is in tight line contact with the rollers. Optimum heat treatment gives the raceway surface uniform strength and the ability to carry heavy loads.