Performance classes

SKF Explorer bearings

In response to the ever-demanding performance requirements of modern machinery, SKF developed the SKF Explorer performance class of rolling bearings.
SKF Explorer deep groove ball bearings realized this substantial improvement in performance by optimizing the internal geometry and surface finish of all contact surfaces, redesigning the cage, combining the extremely clean and homogenous steel with a unique heat treatment and improving the quality and consistency of the balls.
SKF Explorer deep groove ball bearings provide superior performance especially in applications like electric motors, two-wheelers and transmissions. These improvements provide the following benefits:
  • higher dynamic load carrying capacity
  • reduced noise and vibration levels
  • less frictional heat
  • significantly extended bearing service life
These bearings reduce environmental impact by enabling downsizing and reducing both lubricant and energy use. Just as importantly, SKF Explorer bearings can reduce the need for maintenance and contribute to increased productivity.
The designations of SKF Explorer bearings are shown coloured blue in the product tables. The bearings retain the designation of earlier standard bearings. However, each bearing and its box are marked with the name “SKF Explorer”.

SKF Energy Efficient (E2) bearings

To meet the ever-increasing demand to reduce friction and energy use, SKF has developed the SKF Energy Efficient (E2) performance class of rolling bearings. SKF E2 deep groove ball bearings are characterized by a frictional moment in the bearing that is at least 30% lower when compared to a same-sized SKF Explorer bearing.
The bearings realized the substantial reduction of the frictional moment by optimizing the internal geometry of the bearing, redesigning the cage and applying a new, low-friction grease.
SKF E2 deep groove ball bearings have been shown to last longer and consume less lubricant than comparable SKF Explorer deep groove ball bearings. The enhanced performance characteristics require the following conditions:
  • speed n > 1 000 r/min
  • load P ≤ 0,125 C
If conditions vary, contact the SKF application engineering service.
Typical applications include electric motors, pumps, conveyors and fans.
SKF E2 deep groove ball bearings are available in the 60, 62 and 63 series. They are available capped with a seal or shield on both sides and have C3 radial internal clearance as standard.
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