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WSM-430 Bearing Journal Measurement System

Railroad Axle Bearing Journal Measuring Machine

The Simmons Outboard Bearing Journal Measurement System (WSM-430) 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.

Axle Bearing Journal Inspection

Machine Specifications

Machine Dimensions

 Length 166.5 in. 4230 mm
 Width (with Panel) 90.3 in. 2292 mm
 Height 82.8 in. 2102 mm
 Weight 8000 lbs. 3629 kg

General Specifications*

*Applicable up to maximum ambient temperature change of +/- 18°F (+/-10°C).

 Cycle Time 4 minutes
 Journal Diameter Measurement Repeatability +/- 0.0001 in. +/- 0.0025 mm
 Journal Fillet Profile Deviation Measurement Repeatability +/- 0.001 in. +/- 0.025 mm

Utility Requirements

 Electrical Power 22 kW

Wheel Set Dimensions

 Maximum Wheel Diameter 38 in. 965 mm
 Minimum Wheel Diameter 28 in. 711 mm
 Maximum Axle Length 90 in. 2286 mm
 Minimum Axle Length 85 in. 2159 mm
 Maximum Bearing Journal Diameter 7.086 in. 180 mm
 Minimum Bearing Journal Diameter 5.118 in. 130 mm
 Maximum “U” Dimension 70 in. 1778 mm
 Maximum Weight 4000 lbs. 1820 kg

 

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