Product Description
The Bendix M12WKL25-222N Left-Hand S-Cam Brake Camshaft is a heavy-duty replacement component designed for compatible lowboy trailers and commercial trailer drum brake systems. Engineered for Spicer 12.25-inch brake assemblies, this camshaft converts the rotational movement of the slack adjuster into mechanical force that pushes the brake shoes outward against the brake drum, providing controlled and dependable braking performance.
Featuring a 22.25-inch under-head length, 1.5-inch spline diameter, and 28-spline configuration, the M12WKL25-222N is specifically designed for left-hand installations requiring counterclockwise rotation. Its precision-machined steel construction, heat-treated journals, and durable splines help withstand demanding commercial trailer service while reducing wear at critical contact points.
Replacing a worn, bent, corroded, or damaged S-camshaft helps maintain proper brake shoe movement, consistent braking performance, and reliable operation of the drum brake assembly.
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Genuine Bendix replacement S-cam brake camshaft
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Manufacturer Part Number: M12WKL25-222N
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Left-hand (LH) configuration
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Counterclockwise (CCW) camshaft rotation
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Designed for compatible lowboy trailer brake systems
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Spicer 12.25-inch drum brake compatibility
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Style E Spicer high-rise camshaft head
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Compatible with specified Spicer brake configurations manufactured after July 1994
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Under-head camshaft length: 22.25 inches
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Head-to-retaining-ring-groove length: 22 inches
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Spline diameter: 1.50 inches
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Spline count: 28
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Diameter at spider: Approximately 1.625 inches
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Precision-machined carbon steel construction
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Heat-treated journal and spline surfaces for improved durability
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Suitable for heavy-duty commercial trailer braking systems
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Manufactured in the United States
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New replacement component
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Sold individually
The M12WKL25-222N is the left-hand counterpart to the Bendix M12WKR25-222N right-hand S-camshaft. Both share similar dimensional specifications, but their camshaft rotation and installation positions differ.
Before ordering, verify the original camshaft part number, brake manufacturer, rotation direction, shaft length, spline count, and journal diameter. Left-hand and right-hand S-camshafts are not interchangeable.
Specifications are supported by Bendix distributor data and the Bendix camshaft reference catalog.
