Installation tolerances for motor shaft ends

The following table shows the permitted tolerances of the shaft ends and flanges of the drive unit:

Shaft end

Flange

Diameter tolerance according to EN 50347

  • ISO j6 at Ø ≤ 28 mm
  • ISO k6 at Ø ≥ 38 mm ≤ 48 mm
  • ISO m6 at Ø ≥ 55 mm
  • Centering bore according to DIN 332, shape DR..

Centering shoulder tolerance according to EN 50347

  • ISO j6 at Ø ≤ 250 mm
  • ISO h6 at Ø ≥ 300 mm