Simmons WSM-430 Bearing Journal Measurement System
The Simmons WSM-430 Bearing Journal Measurement System is a metrology machine that automatically inspects the outboard bearing journals of used railroad wheel sets to determine if they are reusable, if the axle should be discarded, or if axle repair is possible. The WSM-430 measures bearing journal diameter and taper, upset ends of a bearing journal, profile deviation, and bent axle condition. Measurements are stored in a local database at the machine or can be networked to transfer the data to a remote server. If interfaced with a facility supervision system, those measurements can be used to automatically route the wheel set for maintenance.
Wheel sets are delivered to the WSM-430 via shop rails. Once captured, hydraulically operated lifts on each end of the machine pick up the axle on the bearing journals and raise it into measuring position. The horizontal axis on each side of the machine is extended to place the profile measurement gauge on the dust guard in order to measure the bearing journal profile. The profile can be measured in up to four locations around the circumference of the bearing journal. The wheel set is then rotated continuously while the diameters and runout are measured in two or more locations. The measurement results for both wheels will be displayed on local HMI and saved to the database. The control system will then determine what subsequent operations are required.
Journal Diameter Measurement Repeatability
+/- 0.0025 mm
Journal Fillet Profile Deviation Measurement Repeatability
+/- 0.025 mm
*Applicable up to maximum ambient temperature change of +/-10°C
Maximum Wheel Diameter
Minimum Wheel Diameter
Maximum Axle Length
Minimum Axle Length
Maximum Bearing Journal Diameter
Minimum Bearing Journal Diameter
Maximum “U” Dimension
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