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Engineered for Class 7–8 interstate freight tractors, intermodal container chassis, refrigerated reefers, and severe-duty vocational trailers across North America, this 4707Q Brake Shoe provides a heavy-duty unlined steel foundation core for standard 16.5" x 7" Meritor/Dana Q-Plus drum brake assemblies. Fabricated from high-yield structural steel plate and calibrated under high-tonnage precision coining 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 wheel-end structural integrity and balanced brake foundation geometry under heavy gross axle loads is vital for commercial fleet safety and DOT/FMVSS-121 compliance across North American highway freight corridors. Severe braking cycles and continuous mechanical vibration can cause lower-grade shoe skeletons to twist, distorting the anchor pockets and leading to uneven friction contact, shoe drag, or premature friction block cracking. Our 4707Q 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 4707Q shoe core is manufactured from heavy-gauge structural steel. The web plate and table rim components are joined using automated robotic projection welding, ensuring high weld penetration and resistance against severe shear stress. After welding, the entire skeleton undergoes hydraulic die-coining to guarantee an exact 16.5-inch arc radius. This strict contour alignment eliminates localized high-pressure contact spots, edge pinching, and uneven taper wear when 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 7" (4707Q / Q-Plus) quick-change dual-anchor commercial drum brake configurations across drive, steer, and 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 full-surface contact with brake drums.
Factory CNC-Machined Pivot Ends: Engineered dual-pin anchor and roller pockets prevent mechanical binding and ensure smooth return action with standard 4707Q 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 4707 series non-asbestos friction blocks.
Frequently Asked Questions (FAQ)
Q1: What axle configurations and vehicle platforms are compatible with this 4707Q Brake Shoe?
A: This unlined 4707Q shoe core is designed for North American Class 7 and Class 8 commercial vehicles, including heavy highway tractors, flatbeds, refrigerated reefers, dry vans, and container chassis equipped with 16.5" x 7" Meritor/Dana Q-Plus foundation drum brakes.
Q2: Does this 4707Q 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 primary difference between 4707Q and 4515Q brake shoe skeletons?
A: Both utilize the 16.5" x 7" Q-style dual-pin geometry, but the 4707Q profile features an updated web contour and revised anchor/roller offset engineered specifically for Q-Plus extended-service brake packages, while 4515Q matches traditional standard Q-style setups.
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 commercial axle ratings from 20,000 to 23,000 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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