High-speed E design bearings

E design bearings (fig. 1), when compared to D design bearings, have a more open osculation and a maximum number of smaller balls. They can therefore accommodate very high speeds but do not have the same high load carrying capacity as D design bearings. Compared to B design bearings, E design bearings have a slightly higher speed capability and can accommodate heavier loads.


Typical applications for bearings in the 719 .. E and 70 .. E series include:
  • electro-spindles (fig. 2)
  • high-speed machining centres (horizontal and vertical) (fig. 3)
  • high-speed milling machines
  • high-speed internal grinding machines (fig. 4)
  • high-speed spindles for PCB drilling
  • woodworking machines
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