Assembly of rotor on shaft

The clamping of a wheel or rotor on its shaft is a crucial point. Operational temperatures and velocities reduce the initial clamping from the press fit or shrink fit and tend to liberate the wheel or rotor from the shaft. Although torque transmission can still be guaranteed by using a key between the wheel and the shaft, or by introducing glue during the assembly, the balance of the rotational movement is compromised. The good news is that we have simple solutions that double the temperature range of your clamping and increase by 40% the velocity range thanks to a slight change in the central aperture of the wheel or in the profile of the shaft.


Reasons to switch from shrink fit to the Diaphragm clamping

  1. The Diaphragm clamping is fast (strongly reduces man-hours)
  2. It consumes no heating energy
  3. The tolerances can be less stringent
  4. The clamping holds up to higher temperatures and centrifugal forces
  5. The material cost is exactly the same
  6. No need for special tooling (low investment, quickly applicable)

*ABB applies this technology for the assembly of synchronous-reluctance rotors

Interested in Assembly of rotor on shaft

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Diaphragm Centring replaces advantageously a press- or shrink fit


Shrink fit


Diaphragm press fit

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