ASR-23
Skate Retarder

Electrically controlled railcar braking for classification + hump yard operations.

The ASR-23 is an electrically controlled skate retarder engineered to safely stop and hold railcars in classification and hump yards. Its unique mechanical actuation system, spring-return design and rugged construction deliver dependable braking performance while integrating seamlessly with modern rail yard control systems.

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Product Overview

A rail yard skate retarder built for reliable railcar control.

ASR–23

A mechanical device with black metal parts, red coils, and various small metallic components, resembling a component of an industrial machine or robotics assembly.

The ASR-23 is designed to replace powered skate retarders in yard applications requiring dependable railcar braking and holding. Installed in tandem, it applies braking force to both trucks of a railcar, providing controlled stopping at critical locations throughout the yard.

Designed for standard gauge track, the ASR-23 combines mechanical durability with electrically controlled operation to deliver consistent performance while minimizing maintenance requirements. Whether installed as part of a new automation project or replacing existing equipment, the ASR-23 is engineered for long-term reliability in demanding rail environments.

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ENGINEERING OVERVIEW

ASR–23

The ASR-23 utilizes an electrically driven cam gearbox and mechanical spring-return braking system to apply controlled braking force to passing railcars. Three inductive proximity sensors provide retarder position feedback while 24VDC control and 480VAC drive power allow straightforward integration with existing control infrastructure. Engineered for continuous operation in classification and hump yards, the ASR-23 combines rugged mechanical construction with dependable electrical control to provide reliable car control where it matters most.

Model train track with a black train station on a section of railroad track.

  • The ASR-23 is an electrically controlled skate retarder designed to safely slow, stop and hold railcars in classification and hump yard applications. Using an electrically driven cam gearbox, the retarder actuates a pair of sliding brake channels that apply controlled braking force to the wheel flanges as the railcar passes through the braking zone.

    A spring-return mechanism automatically returns the brake assemblies to their normal position after operation, reducing mechanical complexity while providing dependable, repeatable performance over thousands of operating cycles. When installed in tandem with a second panel, the ASR-23 applies braking force to both trucks of the railcar for consistent car control.

    Design Features

    • Electrically actuated cam gearbox

    • Mechanical spring-return operation

    • Sliding brake channel design

    • Brake pad assemblies

    • Damping spring system

    • Tandem installation for full railcar braking

  • Engineered for continuous service in demanding rail yard environments, the ASR-23 delivers dependable braking performance while minimizing maintenance requirements.

    Operating Characteristics

    • Average cycle time (Closed → Open): 20 seconds

    • Average cycle time (Closed → Shim): 40 seconds

    • Operating temperature: -40°F to +185°F (-40°C to +85°C)

    • Electrically controlled operation

    • Designed for continuous classification and hump yard service

    The ASR-23 is engineered to provide smooth, repeatable braking performance at critical control points throughout the yard.

  • The ASR-23 integrates easily into both existing control infrastructure and modern yard automation systems.

    The retarder supports multiple operating methods, allowing it to be controlled locally or remotely depending on operational requirements.

    Supported Control Methods

    • Remote control circuits

    • Data and network communications

    • DTMF via VHF/UHF radio

    • Local push-button operation

    Three inductive proximity sensors continuously monitor retarder position, providing reliable state indication through PNP normally open outputs for integration with yard control systems.

  • The ASR-23 utilizes industrial-grade electrical components designed for dependable operation in rail yard environments.

    Electrical Specifications

    • Drive Motor: 480VAC, 3-Phase

    • Minimum Rated Supply Circuit: 480VAC, 4.5 Amps (+/-2%)

    • Control Voltage: 24VDC (+/-5%)

    Designed for straightforward integration into standard industrial electrical infrastructure while providing reliable operation under demanding service conditions.

  • The ASR-23 is engineered for installation on standard North American rail infrastructure while providing a robust braking surface and durable mechanical construction.

    Physical Specifications

    • Track Gauge: 4 ft 8½ in (1435 mm)

    • Rail Size: 136RE (136 lbs/yd)

    • Overall Length: 39 ft (1188.7 cm)

    • Overall Width: 9 ft (274.3 cm)

    • Overall Height: 1 ft 6¼ in (46.4 cm)

    • Estimated Shipping Weight: 25,000 lbs (11,340 kg)

    Typical dimensions may vary slightly depending on the supplied track material and installation configuration.

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