Simmons WSM-420 Wheel Set Measurement System
The Simmons WSM-420 Wheel Set Measurement System is a metrology machine that automatically inspects used railroad wheel sets to determine if the wheel set must be demounted, or if it can be re-profiled and returned to service.
The machine measures wheel diameter and width, flange thickness and height, wheel rim thickness, deviation of measured wheel profile from standard profile, wheel back-to-back, depth of flat spots on wheel tread, and depth of grooved wheel tread. The WSM-420 calculates the amount of material that must be removed to restore the wheel profiles to the nominal profile, and determines if the wheel rim will be thick enough to return the wheel set to service after reprofiling.
Wheel sets are delivered to the WSM-420 via shop rails and once captured, the measuring arms are automatically positioned against each wheel tread. The wheel set is rotated while the wheel profiles are measured. The measurement results for both wheels will be displayed on local HMI and saved to the database. The control system determines if there is sufficient material remaining on the tread for further machining.
Machine Specifications
Download the Simmons WSM-420 Wheel Set Measurement System product data sheet — for the full machine specification, please contact the Machine Sales team.
Wheel Diameter
+/- 0.5 mm
Flange Thickness
+/- 0.5 mm
Flange Height
+/- 0.5 mm
Rim Thickness
+/- 0.5 mm
Wheel Back-To-Back
+/- 0.5 mm
Depth of Flat Spots
+/- 0.5 mm
Wheel Profile Deviation
+/- 0.5 mm
Wheel Width
+/- 0.5 mm
*Applicable up to maximum ambient temperature change of +/-10°C
Electrical Power
22 kW
Compressed Air
15 scfm @ 80 psi
Maximum Wheel Diameter
1067 mm
Minimum Wheel Diameter
711 mm
Maximum Axle Length
2286 mm
Maximum Weight
1820 kg
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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.
