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Flexible Ball Bearing
  • F14
  • F17
  • F20
  • F25
  • F32
  • M14
  • M17
  • M20
  • M25
  • M32
  • Flexible Ball Bearing
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    • Description
    • Structure
    • Specification

    Flexible bearings for harmonic reducer are mainly used in harmonic reducer. Harmonic transmission includes three basic components: wave generator, flexible wheel, rigid wheel and flexible bearing. Flexible bearings are the core components, and the transmission meets the performance requirements of high deceleration ratio through the elastic deformation of bearings.


    In the work of flexible bearing, the inner ring is installed on the elliptical cam, the outer ring is installed on the flexible wheel, and the elastic deformation occurs with the rotation of the cam, which not only bears the cyclic stress load, but also bears the alternating stress load.

    These points put forward high requirements for the design and manufacture of bearing inner ring and outer ring and cage, and only a few enterprises such as Japan and the United States can produce it. YDPB Flexible Bearing has reached the advanced level of design and manufacture of flexible bearings for harmonic transmission. The design of flexible bearing has formed a complete theoretical system, the manufacturing technology of the product is becoming more and more perfect, mature, and the product quality is becoming more and more stable. 

    Because the inner ring of the flexible rolling bearing is tightly sheathed with the rigid cam of the wave generator. Therefore, it can be regarded as a rigid elliptical ring, the rolling body (generally a ball) is a particle with concentrated mass connected with the inner and outer rings through the spring, and the outer ring is an elastic thin-wall ring, and its original curve is the inner isometric curve of the original curve of the flexible wheel.

    Harmonic drive transmission consists of three basic components: wave generator, flex spline, Circular Spline and flexible bearing. Among them, the flexible bearing is the core component, and the transmission achieves the performance requirement of high deceleration ratio through the elastic deformation of the bearing.


    When the flexible bearing is in operation, the inner ring is mounted/installed on the elliptical cam, which bears the cyclic stress load during the work; while the outer ring is mounted/installed on the flexible wheel, and elastically deforms with the rotation of the cam during the work, which not only bears the cyclic stress load, but also withstands the alternating stress load.


    Flexible rolling bearing utilizes controllable elastic deformation of the flexible components to transmit motion and power. It has characteristics of large transmission ratio, wide application range, high precision, small air return, large carrying capacity, high efficiency, small volume/size, light weight, smooth transmission, low noise, and can transfer motion to sealed space.


    Robot bearing/harmonic drive bearing is a special kind which easily deforms in a reversible way. 

    It has a very thin outer ring which varies from round shape to oval interatively during its working time. easily double sealed bearing designed primarily for application of radial load—deep ball grooves also permit application of thrust load in either direction, often used in conjunction with another bearing.


    Note: Mostly we supply P4 level high precision bearing,special for harmonic drive ,if your requirements is not high ,pls let us know ,we select suitable products for you.
    Flexible Ball Bearing
    Bearings Model Outer ring Inner ring Dynamic load rating  Static load rating  Radial Deformation  Input rotate speed  Output torque N.m
    Model OD Width B ID Cr Cor Max. mm r/min N.m
    F14 33.896 6.095 25.07 4.74 3.75 0.2 3000 8
    F17 41.722 6.16 30.3 7.12 5.83 0.3 3000 16
    F20 49.073 7.24 35.56 9.93 8.36 0.3 3000 30
    F25 61.341 9.015 45.212 12.89 11.55 0.4 3000 50
    F32 79.756 11.81 58.928 22.28 20.91 0.5 3000 120
    M14 33.896 6.095 25.07 5.53 4.73 0.2 3000 12
    M17 41.722 6.16 30.3 8.31 7.35 0.3 3000 24
    M20 49.073 7.24 35.56 12.63 12 0.3 3000 45
    M25 61.341 9.015 45.212 16.4 16.58 0.4 3000 75
    M32 79.756 11.81 58.928 27.19 28.18 0.5 3000 180
    3E904KAT2 25 4 18.8 3.75 3.12 0.2 3000 2
    3E905KAT2 32 5 24 4.74 3.75 0.2 3000 6
    3E806KAT2 40 6 30 7.12 5.83 0.3 3000 16
    1000907AKIT2 48.2 8 35.8 9.93 8.36 0.3 3000 30
    3E907KAT2 50 8 37 12.63 12 0.3 3000 30
    3E809KAT2 60 9 45 12.89 11.55 0.4 3000 50
    1000809AKIT2 61.8 9.5 45.7 12.89 11.55 0.4 3000 50
    10008810AKT2 63 9.7 48 12.89 11.55 0.4 3000 50
    1000912AKT2 80 12 60 27.19 28.18 0.5 3000 120
    3E911KAT2 75 12 57 14.76 13.18 0.5 3000 7.5
    3E812KAT2 80 13 60 15.51 14.44 0.5 3000 12
    3E814KAT2 95 15 70 22.38 21.57 0.6 3000 20
    3E815KAT2 100 15 75 26.4 25.67 0.6 3000 25
    3E818KAT2 120 18 90 34.7 34.94 1 3000 45
    3E822KAT2 150 24 110 43.55 45.63 1 1500 80
    3E824KAT2 160 24 120 57.02 57.75 1 1500 120
    3E826KAT2 175 30 130 81.59 86.1 1 1500 170
    3E830KAT2 200 30 150 91.6 102.67 1 1500 200
    3E832KAT2 220 35 160 115.66 127.59 1.25 1500 220
    3E836KAT2 240 35 180 130.04 146.47 1.5 1500 250
    3E838KAT2 250 40 190 139.96 160.42 1.5 1500 350
    3E842KAT2 280 45 210 173.15 210.91 1.5 1500 400
    3E844KAT2 300 45 220 181.72 231 1.5 1500 500
    Luoyang Yadian Machinery Equipment Co.ltd