Eddy Current Crack Testing Systems
Spindles, Piston Rods, Bearing Rings

Spindles

Crack and structure test of spindles

  • Testing Hardness, hardening depth at 4 positions ,tempering of basic material ,correct alloying and surface cracks.
  • Cycle time: ≤ 25sec.
  • Crack specification: 3.750mm length x 0.075mm width x 0.50mm depth
  • Crack Orientation: longitudinal and circumferential

Crack and structure test of spindles

Crack and structure test on spindles and followed by laser marking

  • The entire stub and radius is scarred without any gap.
  • Cycle time: 12 seconds/part
  • Crack specification: Longitudinal and circumferential cracks: 3.000mm x 0.075mm width x 0.2000mm depth

Crack and structure test on spindles and followed by laser marking

Crack and structure test on spindles

  • Cycle time:12 seconds
  • Crack specification: Longitudinal cracks: 0.120" length x 0.004" width x 0.008" depth, Circumferential cracks: 0.120" length x 0.003" width x 0.012" depth

Crack and structure test on spindles

Piston Rods

Crack detection with eddy current always requires a relative movement between probe and test part. A rotational movement is well suitable (either the test part rotates or the probe rotates). Thus it is possible to integrate the crack test into production processes which already provide the rotational movement. An example are turning machines, grinding machines or, as in this case, a super-finishing machine. However, it has to be mentioned that the ambient conditions are not optimum for integration of eddy current crack detection into such a production machine (vibration, chips, limited control possibilities) and this will lead to cuts of test sensibility (adaptation of crack specification necessary). Such an integration can only be seen an compromise (low investment costs versus reduced sensitivity).

(Test module with probes and adjustment mechanism)

Bearing Rings

Crack detection on bearing rings

  • 4 probes
  • 2 probes at the circumference
  • 1 probe each for plane faces
  • 4.5 sec/part
  • Minimum crack depth 100um
  • Fully-automatic feeding, testing and sorting

Crack detection on bearing rings

Crack detection on bearing rings

  • 1mm length tolerance
  • 0.5mm diameter tolerance
  • Several different part types
  • 4 parts/second

Crack detection on bearing rings

Crack detection of bearing rings on the inner diameter

  • Bearing ring ID 30mm to 40mm
  • Crack specification: Orientation: longitudinal, Crack depth: 0.100mm, Crack width: 0.050mm, Crack length: 3.000mm
  • Cycle time: 6 seconds per part (600 parts/h)

Crack detection of bearing rings on the inner diameter

Crack test on outer rings

  • ID test
  • 8 seconds cycle time
  • Optional Heat Treat Test Upgrade

Crack test on outer rings

ibg NDT Systems - Designers and manufacturers of state-of-the-art NDT eddy current testers, instruments, and automatic test systems for automotive, bearing and other metal components including fastener, forged and cast parts, hard metals, precision stamped parts, etc.