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Engineered for Class 8 line-haul tractors, heavy-haul lowboys, bulk aggregate haulers, and severe-duty vocational trailers across North America, this 4711Q Brake Shoe provides a heavy-duty unlined steel foundation core for wide-track 16.5" x 8-5/8" Meritor/Dana Q-Plus drum brake assemblies. Fabricated from high-yield structural steel plate and calibrated under high-tonnage precision dies, this bare brake shoe skeleton delivers outstanding structural rigidity, true arc curvature, and exact quick-change dual-anchor geometry to eliminate torsional flexing, prevent shoe chatter, and optimize custom lining reline programs.
Maintaining foundation rigidity, balanced wheel-end deceleration, and strict DOT/FMVSS-121 compliance under extreme gross vehicle weight ratings is critical for severe-duty freight and vocational fleets across North American transport corridors. High-frequency heavy-payload braking cycles, severe torque spikes, and sustained thermal stress can cause inferior extra-wide shoe skeletons to twist, distorting the anchor pockets and leading to uneven friction contact, shoe drag, or premature lining cracking. Our 4711Q Brake Shoe unlined steel skeleton delivers genuine OEM-level dimensional accuracy and heavy-duty structural durability tailored for commercial reline shops, fleets, and parts distributors.
Automated Projection Welding & High-Tonnage Die Coining
Each 4711Q shoe skeleton is manufactured from heavy-gauge structural steel. The wide-table rim and web plate components are joined using automated robotic projection welding, ensuring high weld penetration and resistance against severe shear stress. Following welding, the entire skeleton undergoes hydraulic die-coining to guarantee an exact 16.5-inch arc radius. This strict contour alignment eliminates localized edge pinching, hot-spotting, and uneven taper wear when extra-wide friction blocks are mounted.
Precision Dual-Anchor Q-Plus Geometry & Anti-Rust Protection
Built specifically to match Meritor/Dana Q-Plus dual-anchor pin foundation geometry, the anchor ends and roller pockets are CNC-machined to tight tolerances, ensuring smooth pivot action and preventing roller binding. The bare steel skeleton is fully treated with an industrial electro-deposited or electrostatic powder coating, providing a robust barrier against road salts, moisture, calcium chloride de-icers, and atmospheric oxidation during extended storage and severe road service.
Key Features & Specifications
Target Foundation Fitment: Purpose-built for standard North American 16.5" x 8-5/8" (4711Q / Q-Plus wide-track) quick-change dual-anchor commercial drum brake configurations across drive and heavy-haul trailer axles.
High-Strength Steel Construction: Fabricated from heavy-duty structural steel plate with automated projection welding to prevent web distortion and cracking under heavy torque.
Precision Die-Coined Arc: Hydraulic die calibration ensures a 100% true 16.5-inch arc radius for seamless lining attachment and balanced surface contact with extra-wide brake drums.
Factory CNC-Machined Pivot Ends: Engineered dual-pin anchor and roller pockets prevent mechanical binding and ensure smooth return action with standard 4711Q hardware sets.
Industrial Anti-Corrosion Finish: High-adhesion electrostatic protective coating shields the steel frame against road brine, winter chemical de-icers, and rust.
Standard Rivet Hole Layout: CNC-punched rivet hole pattern allows direct mounting of standard 4711 series non-asbestos friction blocks.
Frequently Asked Questions (FAQ)
Q1: What axle configurations and vehicle platforms are compatible with this 4711Q Brake Shoe?
A: This unlined 4711Q shoe core is designed for North American Class 8 commercial vehicles, including heavy-haul lowboys, bulk dump chassis, logging trailers, and heavy-duty vocational tractors equipped with 16.5" x 8-5/8" Meritor/Dana Q-Plus foundation drum brakes.
Q2: Does this 4711Q Brake Shoe come with friction linings or hardware included?
A: No. This SKU is a bare, unlined steel brake shoe skeleton designed specifically for reline facilities, brake rebuilding shops, and fleet distributors who attach their own friction linings and source hardware separately.
Q3: What is the main difference between 4711Q and 4707Q brake shoe skeletons?
A: While both utilize 16.5-inch diameter Meritor Q-Plus dual-pin geometry, the 4711Q features an extra-wide 8.625-inch (8-5/8") table rim engineered for higher thermal capacity and severe-duty applications, compared to the standard 7-inch width on the 4707Q.
Q4: Can this bare steel shoe handle severe-duty commercial payloads?
A: Yes. The heavy-gauge structural steel core and projection-welded web structure are engineered and tested to support severe-duty commercial axle ratings from 23,000 to 26,000 lbs GAWR under continuous line-haul and vocational operating conditions.
Q5: Do you offer custom part number stamping, laser marking, and bulk palletized shipping?
A: Yes. We support custom web laser etching for OE/distributor part numbers, private branding options, and moisture-protected export pallet packing for containerized shipments.
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