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

Flanges

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
  • Center hole according to DIN 332, shape DR..

Centering shoulder tolerance according to EN 50347

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