Stanray M2/M3 Underfloor Wheel Truing Machine

The Stanray® M2/M3 is an underfloor railway wheel truing machine for reprofiling wheel treads on passenger and light rail vehicles. Utilizing proven Stanray wheel profile milling technology, the M2/M3 performs fully automatic measuring and cutting cycles while managing extreme wheel wear conditions. The machine’s centerless operation allows for quick and easy setup which does not require removal of bogie components or access to axle centers.

The Stanray M2 is designed for light rail vehicles with an axle load up to 180 kN. The M3 accommodates heavy rail applications, with an axle load up to 445 kN.

Stanray M3 Underfloor Wheel Truing Machine

The Stanray M2/M3 includes integrated automatic measuring systems that monitor the wheel location and measure diameter, width, and profile as well as wheel set back-to-back, back face runout, and radial runout on the tread. Final diameters, profile conformity, and other desired parameters are verified and sent to the customer’s data management system or stored locally. The connectivity of the machine also allows for optional remote diagnostics, which will keep your revenue vehicles safe and on track.

Machine Specifications

Download the Stanray M2/M3 Underfloor Wheel Truing Machine product data sheet — for the full machine specification, please contact the Machine Sales team.


Cycle time study available upon request

Profile Accuracy

+/- 0.2 mm

Diameter Parity

+/- 0.15 mm

Roundness (Radial T.I.R.)

+/- 0.1 mm

Surface Finish (as Machined)

< 5 μm Ra

Electrical Power

70 kW

Maximum Compressed Air

5.5-6.9 bar @ 425 lpm

Maximum Axle Load

M2: 40000 lbs. | 180 kN

M3: 100000 lbs. | 445 kN

Maximum Wheel Diameter (at Tapeline)

1118 mm

Minimum Wheel Diameter (at Tapeline)

432 mm

Maximum Wheel Width

148 mm

Minimum Bogie Clearance (Lowest Point Above Rail)

50 mm

We're here to help

The NSH USA Customer Service Center (CSC) is here to support you and your machine. As the original equipment manufacturer (OEM), we are ideally suited to keep your machine productive and operating safely.

We offer:

OEM Spare & Replacement Parts
New or Upgrade Services
Service & Inspections

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Contact the NSH USA Customer Service Center today for support.

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