Surface Crack Measurement (SCM)

SCM is a contactless technology for monitoring the status of rails and wheels. It enables condition-based maintenance and replaces the less accurate time- and mileage-based calculations. SCM offers significant advantages over eddy-current measurement. For instance, no assumptions about crack angles are required. It can also be used to inspect areas where ultrasonic sensing is blinded by surface defects. Where other technologies require highly skilled operators to interpret the readings, SCM needs only minimal operator training and reports an objective, quantitative crack depth, telling you exactly how many millimeters or inches of material to remove from rails or wheels.

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The right solution for every environment

To make the search for surface cracks and other material defects as efficient as possible, SCM has been adapted for various applications. Along with three devices to analyze rails, we have a hand-held unit for examining wheels. The range enables measurements at a variety of speeds and levels of portability.

Vehicle-mounted system for surface crack measurement of rails

The vehicle-mounted system was developed especially for the efficient inspection of longer rail sections. Mounted on a service vehicle, trailer or trolley, the system scans both rails at up to 40 km/h (~25 mph) – perfect for periodic surveys of network health. Additionally, we offer measuring as a service, using MRX owned and operated vehicles, so that you can concentrate completely on your core business.

Your benefits
• Scans both rails simultaneously, for faster data acquisition
• Can be installed on various types of rolling stock
• Available both as a purchase solution and as a service

Walking stick for surface crack measurement of rails

For medium distances, small maintenance windows or limited track access (e.g. in underground networks) we have developed the walking stick. It is ready to scan in less than a minute and can be removed from the rail within seconds. Rails can be scanned at up to 5 km/h (~3 mph).

Your benefits
• Maximum flexibility
• Maximum track availability for regular traffic

Hand-held unit for surface crack measurement of rails

It’s not always about measuring kilometers or miles of rail. When welding, for instance, it’s essential to reliably rule out surface defects near the weld site. Our hand-held unit is designed to inspect very short sections, consistently and reliably. As the lightest, most portable product of its kind available today, this unit gives you greater flexibility – and can be easily converted for use as a wheel measurement device.

Your benefits
• Smallest device on the market
• Light in weight: best portability
• Easy to convert for use on wheels, and vice versa

Hand-held unit for surface crack measurement of wheels

The hand-held unit allows for an easy, accurate and repeatable measurement of RCF and its depth. It also saves a great deal of time. The handheld device, designed for use in a workshop, simply and efficiently inspects the surface of each wheel. The manual sensor head rolls on the wheel tread to detect and quantify the extent of surface cracking. Unlike the usual visual inspections, the hand-held unit creates a damage map showing the exact position and severity of any damage. This way, rail operators no longer have to rely on rough estimates – they know whether or not a wheel needs to be machined, and how much material needs to be removed.


Your benefits
• Increased availability due to more predictable maintenance
• More precise results than with visual inspection
• Extended wheel lifetime due to optimized machining
• Easy to convert for use on rails, and vice versa


Our service – your benefits

• Increased operational safety for infrastructure and fleet
• Immediate, precise feedback
• Extended rail and wheel lifetime
• Less unplanned downtime
• Stored data for trend analysis


Information for railway operators

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For more information about Vehicle Equipment Mesaurement Systems, please send an e-mail to our experts. They will be glad to assist you.

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