Elastic shaft kit (PT 500.10)

Elastic shaft kit (PT 500.10)

flexural vibration of the elastic shaft



  • This accessory setup enables the response of an elastic rotor to unbalanced excitation to be studied.
  • The subcritical, supercritical and resonance running states can be demonstrated.
  • A comparison of the orbits (path curves) in the subcritical and supercritical range is of particular interest.
  • The field balancing of elastic rotors is another area which can be investigated.
  • The supplied pendulum ball bearings ensure full mobility of the shaft.
  • The safety bearing limits the amplitudes to harmless values at speeds close to resonance.
  • The accessory setup is mounted on the base plate of the machinery diagnostic base system PT 500.
  • To measure and evaluate the experiment, the computerised vibration analyser PT 500.04and two displacement sensors PT 500.41 are required.
  • It includes all the necessary sensors, a measuring amplifier and analysis software to record the vibration phenomena.

Technical Details:


  • investigation of flexural vibration of an elastic shaft
  • stainless steel elastic shaft
  • 2 bearing blocks with pendulum ball bearing
  • 1 bearing
  • bearing blocks and safety bearing with bores for sensor mounting
  • accessory set for machinery diagnostic training system PT 500
  • stackable storage system to house the components

Technical Data:

  • Elastic shaft:
    • diameter: Ø=10mm
    • diameter at bearings: Ø=20mm
    • length: 530mm
    • nominal length between bearings: 450mm

Dimensions & Weight:

  • L x W x H: 600x400x120mm (storage system)
  • Weight: approx. 6kg

Learning Objectives/Experiments:

  • familiarisation with the terms “critical speed” and “resonance”
  • influence of unbalanced excitation
  • alignment of the elastic rotor
  • influence of alignment errors
  • understanding and interpreting frequency spectra
  • use of a computerised vibration analyser
  • together with two displacement sensors PT 500.41:
  • study of the orbit in the subcritical and supercritical range


Scope of Delivery:

  • 1 elastic shaft
  • 2 bearing blocks
  • 1 safety bearing
  • 1 storage system with foam inlay
  • 1 manual


  • resonance and critical speed


  • Required:
  • PT 500 Machinery diagnostic system, base unit
  • T 500.41 Two displacement sensors

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.