Inspection NDT

Ultrasonic Railway Axle Testing Solutions

Krautkrämer CHAT

High-speed railway and urban train systems, equipped with hollow axles, are frequently used in the transportation industry. Increased travel speeds place higher stresses on these systems requiring special attention to the structural integrity and reliability of trains and their axles.

Krautkrämer's Compact Hollow Axle Tester (CHAT) combines the proven HW probes with Krautkrämer’s high-quality USIP 40 ultrasonic instrument. With up to eight probes in one probe holder, in a diameter range from 30 to 90 millimeters, full A-scan data recording, C-scan displays (separate or merged with TOF correction), and two motorized scanning axes, CHAT offers a typical inspection time of 12 to 15 minutes for an entire axle, while the spiral scan pattern guarantees full coverage of the test object.

We used to be GE Inspection Technologies, now we’re Waygate Technologies, a global leader in NDT solutions with more than 125 years of experience in ensuring quality, safety and productivity.

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Product Features

Krautkrämer CHAT Technical Specifications

  • Explore Krautkrämer CHAT's Technical Specifications
    • Mechanics


      • Endless rotation of the probe holder
      • Oil coupling closed-loop system
      • Modular push/pull U-profile to inspect the whole axle length just from one side
    • Speed


      • Rotation: 35 RPM; Linear: 30mm/s max
      • Position tracking with encoders on both axis
    • Inspection Length

      Inspection Length

      • 2,4 m typical with connectable U-profiles, extensions available
    • Inspection time

      Inspection time

      • 15 min typical, depending on UT setup.
    • Trolley


      Moveable trolley that carries the following:

      • PC (notebook equipped with own battery)
      •  UT-Instrument
      • PLC
      • Oil tank with pumps
      • Storage space for inspection mechanics and U-profiles.
    • Weight


      • Inspection mechanics approx. 10 kg plus trolley approx. 90kg (without Oil, UPS, main power cable).
    • Electric


      • 220-240V ~50Hz, 15 m mains cable at the trolley.
      • Optional: 10 min UPS (+13kg) to allow UT-Instrument and PLC to stay online while changing the main power plug connection.
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