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Engineered for Class 7–8 line-haul tractors, intermodal container chassis, refrigerated haulers, and severe-duty vocational trailers across North America, these 4702 Brake Linings provide a dependable foundation friction reline solution. Specially configured to fit standard 4702 profile foundation brake shoes on 15" x 4" / 15" x 5" and standard foundation drum brake assemblies, this friction block set delivers responsive stopping torque, exceptional heat fade resistance, and uniform drum wear across demanding highway freight lanes.
Achieving balanced braking deceleration and complying with stringent FMVSS-121 regulatory standards under full gross combination weights demands friction materials capable of withstanding severe thermal stress. High-frequency stop-and-go delivery cycles and continuous downhill braking create extreme temperatures at the wheel-end, where substandard blocks suffer thermal decay, friction glazing, and rapid edge taper.Our 4702 Brake Linings deliver genuine OE-standard dimensional precision and commercial-grade durability optimized for North American fleet operations.
High-Density Non-Asbestos Friction Formulation
Formulated from advanced low-metallic non-asbestos materials, each 4702 friction block is molded under extreme hydraulic pressure and stabilized through controlled thermal post-curing. This resilient compound maintains an optimal, stable friction coefficient across working temperatures reaching 750°F (400°C), eliminating brake fade and providing dependable stopping distance under heavy payload demands.
Precision Rivet Hole Pattern & Drum-Friendly Wear Profile
Each lining segment features factory-drilled and chamfered rivet holes precisely aligned with standard 4702 brake shoe steel cores, ensuring maximum shear strength and vibration resistance under sudden torque spikes. The refined friction compound promotes even contact across commercial brake drums, significantly preventing localized hot-spotting, drum scoring, and premature lining taper.
Key Features & Specifications
Target Foundation Fitment: Precision-engineered specifically for North American standard 4702 commercial brake shoe skeletons on foundation drum brake assemblies.
FMVSS-121 Certified Compound: High-performance non-asbestos friction formulation provides short stopping distances, low dust generation, and dependable thermal stability.
Superior Thermal Fade Resistance: Thermally cured to operate continuously under heavy line-haul cycles with consistent friction coefficient up to 750°F (400°C).
Precision Rivet Alignment: CNC-machined rivet hole positions guarantee effortless mechanical fastening and maximum shear load integrity on 4702 shoe cores.
Extended Drum & Lining Life: Smooth, balanced friction matrix minimizes drum micro-grooving, heat cracking, and uneven shoe taper wear.
Frequently Asked Questions (FAQ)
Q1: Which brake shoe models and axle setups are compatible with these 4702 Brake Linings?
A: These friction blocks are engineered specifically for North American commercial drum brake setups utilizing standard 4702 profile foundation brake shoes on steer, drive, and trailer axles.
Q2: What friction formulation is used in these 4702 Brake Linings?
A: They utilize an eco-friendly, low-metallic non-asbestos organic (NAO/semi-metallic) formulation engineered for 20,000 to 23,000 lbs GAWR commercial fleet operations.
Q3: Are rivet holes pre-drilled in the lining blocks?
A: Yes. All 4702 lining segments come precision-drilled and counterbored to match OEM rivet hole patterns for immediate fastening onto standard 4702 steel shoe cores.
Q4: How do these linings perform under sustained downhill braking and high-temperature conditions?
A: The friction material undergoes a specialized thermal post-curing process to prevent glazing and brake fade, ensuring rapid heat dissipation and reliable torque recovery under heavy braking cycles.
Q5: Can you provide customized packaging, edge-code stamping, and palletized bulk shipping?
A: Yes. As a direct manufacturing source, we provide custom part-number edge printing, private-brand packaging boxes, and export-grade pallet packaging for North American parts distributors and fleet suppliers.
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