WSM-420 Wheel Set Measurement System
The Simmons Wheel Set Measurement System (WSM-420) 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 re-profiling.
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
For a full list of machine specifications, please download our Simmons Wheel Set Measurement System (WSM-420) spec sheet.
Wheel Diameter
+/- 0.020 in. | +/- 0.5 mm
Flange Thickness
+/- 0.020 in. | +/- 0.5 mm
Flange Height
+/- 0.020 in. | +/- 0.5 mm
Rim Thickness
+/- 0.020 in. | +/- 0.5 mm
Wheel Back-To-Back
+/- 0.020 in. | +/- 0.5 mm
Depth of Flat Spots
+/- 0.020 in. | +/- 0.5 mm
Wheel Profile Deviation
+/- 0.020 in. | +/- 0.5 mm
Wheel Width
+/- 0.020 in. | +/- 0.5 mm
*Applicable up to maximum ambient temperature change of +/- 18°F (+/-10°C)
Electrical Power
22 kW
Compressed Air
15 scfm @ 80 psi
Maximum Wheel Diameter
42 in. | 1067 mm
Minimum Wheel Diameter
28 in. | 711 mm
Maximum Axle Length
90 in. | 2286 mm
Maximum Weight
4000 lbs. | 1820 kg
We're here to help
The Simmons 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.
