9. T 6. Inter 1. T r - nachi-tool.jp

1 Technical Infor mation 1. 1. TTypes and Features of Bearings 2. Selection of Bearings 3. Load Capacity and Life of Bearings 4. Boundary Dimensions and Nomenclature 5. Accuracy of Bearings 6. Internal Clearance of Bearings 7. Matearials of Bearings 8. Application of Bearings 9. Trouble-shooting bearing Problem 1. types and Featur es of Bearings Classification and types Designs and Featur e Deep Gr oove Ball Bearings Single-r ow Angular Contact Ball Bearings Double-r ow Angular Contact Ball Bearings Self-aligning Ball Bearings Cylindrical Roller Bearings Taper ed Roller Bearings Spherical Roller Bearings Thr ust Ball Bearings Spherical Roller Thr ust Bearings 1. types and Featur es of bearings Classification and types of Rolling Contact Bearings In general, rolling contact bearings may be classified as radial or thrust bearings according to bearing design or they may be classified as ball or roller bearings according to the type of rolling element.

2 Radial bearings are mainly designed for supporting a load perpendicular to a shaft axis, whereas thrust bearings accept loads parallel to the shaft axis. Using the BALL and ROLLER classification ROLLER bearings may be further divided according to the shape of the roller into the sub- classes; Cylindrical roller, Tapered roller, Spherical roller, or Needle roller bearings. BALL bearings can be further divided according to the number of rows into either single-row or double-row (for Thrust Ball bearings, single-direction and double-direction.) BALL bearing may be still further sub-divided into smaller segments according to the relationship between the bearing rings and rolling elements; the shape of bearing rings; and use of accessories. Bearings are also classified by specific application, such as Clutch-release ball bearings for automotive applications.

3 Table indicates the principal types of radial and thrust bearings and a summary of their design. Table summarizes the designs and features of rolling contact bearings. Table Classification and types of Rolling Contact Bearings Rolling Contact Bearings Radial Bearings Thrust Bearings Bearings for Specific Application Ball Bearings Roller Bearings Ball Bearings Roller Bearings Table types and Features of Rolling Contact Bearings Table Classification and types of Rolling Contact Bearings 1/2. Radial Bearings > Ball Bearings Cross bearing Series Symbols bearing types Sections JIS Others OOB60. 67 60 RLS. Without filling slot 68 62. (JIS B 1521) RMS. 69 63 16000. UC UM U. Without filling slot UWE UK B. Single row [for unit ;JIS B 1558] UNE KH. Deep Groove Ball Bearings With filling slot - Without filling slot - Double row 42.

4 With filling slot - 43. Non-Separable - Counter-Bored Single row Bearings E. Separable (JIS B 1538) BM. EN. Table Classification and types of Rolling Contact Bearings 2/2. Radial Bearings > Ball Bearings Cross bearing Series Symbols bearing types Sections JIS Others Non-Separable 79 72. (JIS B 1522) 70 73. Single row Separable - Angular Contact Without 52. filling slot - 53. Ball Bearings Double row 32. With filling slot - 33. DB mounting Duplex DF mounting - mounting DT mounting Outer ring 12 22. Self-Aligning Double 13 23. Ball Bearings row raceway : spherical Table Classification and types of Rolling Contact Bearings 1/2. Radial Bearings > Roller Bearings Cross bearing Series Symbols bearing types Sections JIS Others NJ2 NJ23. Without NJ22 NJ4. loose rib NJ3.

5 Inner ring Outer ring with a rib with ribs NH2 NH23. With NH22 NH4. loose rib on both sides NH3. [JIS B 1533]. NU10 NU3. Single Inner ring NU2 NU23. row without rib NU22 NU4. Outer ring NF2. Cylindrical Roller with a rib NF3. Bearings Inner ring [JIS B 1533] NF4. with ribs on both sides Outer ring N2. without rib N3 N10. N4. Inner ring with ribs Outer ring without rib NN30. on both sides Double row Outer ring Inner ring without rib with ribs NNU49. on both sides Table Classification and types of Rolling Contact Bearings 2/2. Radial Bearings > Roller Bearings Cross bearing Series Symbols bearing types Sections JIS Others Inner ring NA48. without rib Outer ring NA49. Needle Roller Single with ribs Bearings row Without on both sides RNA48. inner ring RNA49. Separable 320 303 329.

6 Single 302 303D 331 330. row (JIS B 1534). 322 323 313 332. Separable (Inward) - KBD. Tapered Roller Double Bearings row Separable KBE. (Outward) - KDE. Four Separable - row Outer ring Single raceway : spherical - row Spherical Roller Bearings Outer ring 239 231 232. Double raceway : spherical 230 241 213. row 240 222 223. Table Classification and types of Rolling Contact Bearings Thrust Bearings > Ball Bearings Cross bearing Series Symbols bearing types Sections JIS Others Flat back face 511 513 29 39. (JIS B 1532) 512 514 9 0. Flat back face - TMN. Single direction - TG. Flat back face 532(U) 7(U). Thrust Spherical back face - 533(U) 37(U). Ball Bearings 534(U) OOT6(U). 522. Flat back face 523 19. (JIS B 1532). 524. Double direction 542(U). Spherical back face - 543(U).

7 544(U). Single Non-Separable - TAB. Thrust direction (DB, DF, DT). Angular Contact Ball Bearings Double Separable - TAD. direction Table Classification and types of Rolling Contact Bearings Thrust Bearings > Roller Bearings Cross bearing Series Symbols bearing types Sections JIS Others - Thrust Cylindrical TMP. Roller Bearings Flat back face Single direction Thrust Tapered - Roller Bearings Flat back face 292. Spherical Roller Single Outer ring Thrust Bearings direction raceway : spherical 293. 294. Table Classification and types of Rolling Contact Bearings Bearings for Specific Application Cross bearing Series Symbols bearing types Sections JIS Others Self-Aligning Clutch-Release - SCRN. Ball Bearings Ball Bearings for Wheel (1st type) - BVV. Automotive Bearings Ball Bearings for Wheel (2nd type) - F BVV.

8 Ball Bearings BG. for Air Conditioner Clutch - FCD. - JC. Journal Bearings for Rolling Stocks AP. - JT. Sheave Bearings E50. - RB48. RC48. Table Classification and types of Rolling Contact Bearings 1/3. Low Permissible Applicable Inner ring Features Load High aligning Aligning Separable Applicable noise to with carring speed Accuracy of inner Rigidity action inner ring to Low ring "free side" tapered bearing Type capacity rotation outer ring "fix side". torque outer ring only bore Deep Groove Ball Bearings Angular Contact Ball Bearings Double Row Angular Contact Ball Bearings Duplex Mounting Angular Contact Ball Bearings Self-Aligning Ball bearing Cylindrical Roller Bearings Double Row Cylindrical Roller Bearings Remarks (1) and show radial load and axial load respectively and mean single direction and double directions respectively.

9 (2) Mark " " shows possibility for getting the characteristics. More number of " " means much easier than less number. "X" mean "not applicable". (3) " " means "applicable". " " means "can be applicable", but shaft thermal expansion must be absorbed. (4) Thrust Ball/Roller Bearings can sustain axial loads ONLY. (5) This table is for reference only. Bearings should be selected for specific applications. Table Classification and types of Rolling Contact Bearings 2/3. Low Permissible Applicable Inner ring Features Load High aligning Aligning Separable Applicable noise to with carring speed Accuracy of inner Rigidity action inner ring to Low ring "free side" tapered bearing Type capacity rotation outer ring "fix side". torque outer ring only bore Tapered Roller Bearings Double-row Multi-row Tapered Roller Bearings Spherical Roller Bearings Cylindrical Roller Bearings With One Rib Inner Ring Cylindrical Roller Bearings With L-shaped Thrust Collar Needle Roller Bearings Remarks (1) and show radial load and axial load respectively and mean single direction and double directions respectively.

10 (2) Mark " " shows possibility for getting the characteristics. More number of " " means much easier than less number. "X" mean "not applicable". (3) " " means "applicable". " " means "can be applicable", but shaft thermal expansion must be absorbed. (4) Thrust Ball/Roller Bearings can sustain axial loads ONLY. (5) This table is for reference only. Bearings should be selected for specific applications. Table Classification and types of Rolling Contact Bearings 3/3. Low Permissible Applicable Inner ring Features Load High aligning Aligning Separable Applicable noise - to with carring speed Accuracy of inner Rigidity action inner ring - to Low ring "free side" tapered bearing Type capacity rotation outer ring "fix side". torque outer ring only bore Single Direction Thrust Ball Bearings With Flat Back Face Single Direction Thrust Ball Bearings With Spherical Flat Back Face Double-row Thrust Angular Contact Ball Bearings Thrust Cylindrical Roller Bearings Thrust Tapered Roller Bearings Spherical Roller Thrust Bearings Remarks (1) and show radial load and axial load respectively and mean single direction and double directions respectively.