SWITCH AND CROSSING GAUGE
The ABT4670 ( IMPERIAL SCALES) Switch and Crossing Confirmation Gauge has been developed for the undertaking of dimensional checks within the moveable part of a switch unit.
Constructed from hard-wearing GRP and Nylon, making it electrically non-conductive, making it suitable for use in areas of 3rd and 4th rail electrification and won’t interfere with the track signaling circuit.
AAR Wheel Profiles: Indicator at 60 degree plane.
Free-Wheel Clearance (FWC) Switch Opening / Throw
This is the dimension between the running edge of the stock rail and the rear face of the adjacent switch point.
Free Wheel Clearance: 1-9/16″ to 5-23/32″ (38 mm to 120 mm)
Free-Wheel Passage (FWP)
This is the dimension between the rear face of an open switch and the running edge of the closed switch point.
Free Wheel Passage: 53-15/16″ to 55-1/8″ (1370 mm to 1400 mm)
The RRT-ABT4670 is fitted with AAR 1BWF wheel profiles on its upper face in order to aid the visual inspection of switch rail wear when the gauge is turned upside down. Indicator line at 60 degree plane.
Back to Back: Nominal 53-5/8″, Range: 52-15/16″ to 53-3/16″
(Nominal: 1362 mm, Range: 1344.6 mm to 1350.96 mm)
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