Stainless steel deep trench ball bearings d 1.5-7mm
Product Parameter
  • Basic size of mm
    d 4
    D 9
    B 4
  • The basic rated load is kN
    trends C 0.449
    static state Co 0.173
  • Fatigue load limit Pu 0.0075
  • Rated rotation speed is r/min
    Refer to the speed 140000
    limit speed 70000
  • Mass kg 0.001
  • model W638/4-2Z
  • Dimensions are mm
    d 4
    d1 ~ 5.2
    D1 ~ 8.1
    r1,2 the min 0.1
  • Shoulder gear and chamfer size mm
    da the min 4.6
    Da the max 8.4
    ra the max 0.1
  • Calculation coefficient
    kr 0.015
    fo 10