On October 1-4, 2023 OKOndt GROUP attended Railway Interchange 2023 - the largest North American railway event. This time the exhibition took place in Indianapolis, Indiana, USA (Indiana Convention Center) and brought together over 700 exhibitors and more than 8, 000 visitors who are the major influencers in the industry. Thank you to everyone who was with us at the RI 2023!


OKOndt GROUP has a vast experience in production of flaw detectors of different types – ultrasonic, eddy-current and electromagnetic acoustic. There is also a large spectrum of ndt equipment for sale to meet the requirements of automated testing. Ndt products for automated testing are highly sophisticated means that can solve specific tasks of ndt inspection during manufacturing of prefabricated components and parts. The systems for automated testing are mainly composed by specialized multiple flaw detectors combined with a set of other NDT tools. Ultrasonic flaw machines are intended for non-destructive testing of products for the presence of defects such as discontinuity and inhomogeneity of material in raw stock, finished items, in-process goods, welded, soldered, bolted, riveted and other joints. Also, ultrasonic flaw detectors can be used for solving additional testing tasks, such as measurement of thickness, assessment of sound velocity in various materials, etc.





Ultrasonic testing

Ultrasonic testing


Eddy-current testing

Eddy-current testing


Automated testing

Automated testing


Electromagnetic acoustic testing

Electromagnetic acoustic testing




Ultrasonic thickness gauges are ndt tools that utilize the same principles as UT flaw detectors, but serve only for estimating thicknesses of components and parts, and calculating sound velocities in them. Eddy-current flaw detectors are used for testing parts and components for the presence of surface or subsurface defects, such as discontinuity of the material (cracks, overlaps, holes, fine cracks, etc.) by utilizing eddy current technique. Each set of non-destructive testing devices - be it purposed for testing of either longitudinal pipes or railcar axles or aircraft parts, is a flaw detector backed up by a kit of ndt testing equipment, which enables the basic flaw detector to handle any specialized task or to perform universal flaw detection. So, buying a flaw detector from OKOndt GROUP means getting a pre-assembled set of non-destructive test equipment, which consists of a variety of transducers, cables, calibration blocks for different applications. Our multi-purpose ndt machines allows solving a wide range of testing tasks. Besides, OKOndt GROUP performs ndt equipment sales, with a possibility to adjust the purchased product to specific customer’s needs.




SNK KP - 8.3 system of complex testing of the railcars wheel pairs

SNK KP-8.3 automated system for complex non-destructive testing of railcars wheel pairs is intended for automated non-destructive testing of freight cars wheel pairs by ultrasonic and current techniques for the purpose of defects detection such as metal inhomogeneity, cracks of various directions, surface defects, in compliance with RD 07.09-97 and TSV-0052.

It is a stationary system.

The system carries out automated complex non-destructive testing of railcar wheel pairs elements of RU1-957 and RU1SH-957 types. Rolling circle diameter – no more than 964 mm for new wheels and no less than 850 mm for wheels with max. wear.

SNK KP-8.3 automated system for complex non-destructive testing of railcars wheel pairs is intended for automated non-destructive testing of freight cars wheel pairs by ultrasonic and current techniques for the purpose of defects detection such as metal inhomogeneity, cracks of various directions, surface defects, in compliance with RD 07.09-97 and TSV-0052.

It is a stationary system.

The system carries out automated complex non-destructive testing of railcar wheel pairs elements of RU1-957 and RU1SH-957 types. Rolling circle diameter – no more than 964 mm for new wheels and no less than 850 mm for wheels with max. wear.

The system of complex testing of the railcars wheel pairs

The system of complex testing of the railcars wheel pairs

The system of complex testing of the railcars wheel pairs

 Main specifications of the system:

  • number of ultrasonic and EMA channels:
    • for the solid-rolled wheel testing – 25;
    • for the wheel pair axle testing – 13.
  • number of eddy current channels:
    • for the wheel rim side surfaces testing – 16;
    • for the roll surface testing – 8;
    • for the testing of the hollow chamfer from the disk to the rim – 20;
    • for the wheel pair axle testing – 8.
  • USW rated frequencies value – 0.4 MHz, 2.5 MHz and 5 MHz. Relative USW frequency deviation from rated values are within the limits of 10 %;
  • value of the rated probe refracted angles – from 0 to 90 angular degrees;
  • initial pulses frequency is set by an encoder;
  • testing areas ranges: wheel pair wheel (WP) – from 0 to 130 mm for angle beam probes, from 5 to 125 mm for straight beam probes; WP axle – from 100 to 1900 mm for straight beam single crystal probes, from 200 to 1020 mm for angle beam probes;
  • system sensitivity threshold during eddy current testing for artificial defects such as "sawcut" in the enterprise standard sample SOP-2353.08: depth – 0,5 mm; width – 0,1-0,3 mm;
  • system sensitivity threshold during ultrasonic testing for artificial defects such as "sawcut" and "drilling" according to the normative documentation RD 07.09.97 and RD 32.144-2000;
  • WP rotation frequency is adjusted in the range from 2,0 to 5,0 turns/min.;
  • system performs the following service functions:
    • recording and storing of testing results;
    • printing and storing of testing results (testing report) on electronic data carrier;
    • system assures testing efficiency of no less than 10 wheel pairs per hour as soon as they are continuously loaded to the testing site and are flaw-free.