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KD715 · Damage to Gears

Damage to gears experiment - vibration-based diagnosis of tooth faults

Experiments
  • Identification of gear damage from its vibration signature
  • Comparison of spur-toothed and helical gearing
  • Localisation of a faulty tooth within a gear pair
  • Influence of lubrication - oil vs. grease - on the vibration spectrum
  • Influence of centre distance and backlash (adjustable bearing plates)
  • Load-dependent behaviour using the KD705 brake & load unit
  • Interpretation of frequency spectra and use of the Sangari vibration analysis software
  • Works together with the KD700 base unit
KD715
Description
    The KD715 is a small two-shaft gearbox designed for swapping gear sets mid-experiment. Two undamaged and two damaged gear sets are supplied - one spur-toothed and one helical pair of each - so that the spectral signature of tooth damage can be isolated by direct comparison. The transparent housing cover lets students watch the meshing while the instrumented cover (with sensor ports) is used for vibration runs.
KD715 damage to gears experiment - schematic
Transparent housing cover (visual inspection)
Two-shaft gearbox housing
Tapped hole for vibration sensor
Bearing cover with centre-distance adjustment
Spur & helical gear sets - damaged and reference
KD715 damage to gears experiment - schematic
Transparent housing cover (visual inspection)
Two-shaft gearbox housing
Tapped hole for vibration sensor
Bearing cover with centre-distance adjustment
Spur & helical gear sets - damaged and reference
Overview
    KD715 front view
Specifications
    Transmission ratio i = 1 : 3
    Spur gears wheel 75 teeth, pinion 25 teeth, m = 2 mm; reference profile DIN 867
    Helical gears wheel 75 teeth, pinion 25 teeth, m = 2 mm; helix angle 10°
    Gear sets 2 damaged + 2 undamaged (1 spur, 1 helical of each)
    Housing 2 covers - transparent (observation) + instrumented (sensor mounting)
    Lubrication grease or gear oil (1.5 L SAE 10W-40 supplied)
    Loading requires KD705 brake & load unit
    Compatibility designed for the KD700 base unit
    Storage 600 × 400 × 320 mm stackable case with foam inlay
    Weight approx. 25 kg

Part of package

Machinery Diagnostics Lab

KD700 KD705 KD710 KD711 KD712 KD713
KD714 KD715 KD716 KD717 KD718 KD719

A modular training system for vibration measurement and condition monitoring of rotating machinery. Built around the KD700 base bench, it covers rotor dynamics, coupling and bearing faults, belt drives, gears, cavitation, fan and motor vibration through interchangeable experiments.

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