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The 4718 Brake Lining, officially designated by FMSI# 4718, is a heavy-duty friction component meticulously engineered for ROR systems and commercial trailers. Characterized by a distinctively wide-format design, its 203.2 width—which is nearly 60% wider than standard 127-width linings—provides an expansive braking surface area that drastically improves stopping efficiency for high-demand transport operations. Specifically designed to precisely fit drum size 419, this lining features an exact arc length of 189.1/194.6 and a variable thickness range of 21.2/17.6-20.0/12.0. Developed by Dingchi, the specialized formulation supports a Gross Axle Weight Rating (GAWR) of 20,000 lbs and 23,000 lbs, with ample structural capacity to handle even higher dynamic loads. Fully FMVSS 121 compliant, the 4718 lining meets rigorous federal safety standards for heavy transport. Whether deployed in cross-country long-haul trailers, heavy-duty ROR waste vehicles, or dense cargo carriers, this wide-stance lining ensures consistent thermal stability, reduced mechanical wear, and uncompromising durability under extreme operational stresses.
The signature 203.2 width of the 4718 lining fundamentally alters how friction is applied to the drum. By increasing the physical contact area by nearly 60% over standard linings, this expansive surface delivers immediate, forceful stopping power without requiring aggressive pedal pressure. The broader footprint spreads the mechanical force evenly across a larger surface, which significantly reduces localized wear and minimizes the risk of drum scoring. Furthermore, this wide geometry acts as a highly efficient heat sink, allowing thermal energy to dissipate rapidly, thereby preventing brake fade during prolonged descents or sudden highway decelerations.
Engineered to exact tolerances, the 189.1/194.6 arc length is calibrated to accommodate minor, natural drum wear over time, ensuring the lining maintains full, consistent contact from the very first application. The carefully calculated thickness profile of 21.2/17.6-20.0/12.0 provides an optimal balance between long-term durability and the necessary physical flexibility to adapt to shifting drum geometries under heavy payloads. This precision fit eliminates vibration and harsh metallic squealing, resulting in a smoother, quieter, and more controlled braking experience.
At the core of the 4718 is Dingchi’s proprietary friction blend, formulated specifically to manage the extreme kinetic energy of 20,000-23,000 lbs GAWR axles. The material composition features advanced heat-resistant organic and semi-metallic compounds that retain their structural integrity and friction coefficient even when temperatures spike to 600°F. This remarkable thermal resilience prevents surface glazing and fade during frequent, heavy-duty stops—such as navigating congested urban routes or managing speed on steep downhill grades.
Safety is non-negotiable in commercial transport, and the 4718 is rigorously tested to meet and exceed FMVSS 121 federal standards. This compliance guarantees that the lining has passed stringent evaluations for stopping efficiency, fade recovery, and structural integrity under emergency braking conditions. Fleet operators gain the ultimate peace of mind knowing their vehicles are equipped with regulatory-compliant components that actively protect drivers, valuable cargo, and the public.
Beyond the friction material itself, the structural backing undergoes a sophisticated temperature-controlled quenching process, hardening the metal to resist deformation under extreme clamping forces. Following this, a high-standard electrophoretic coating (E-Coating) is applied. This deep-penetrating finish provides exceptional resistance against rust, corrosive road salts, and moisture, ensuring the lining maintains its structural integrity and clean visual finish even in the harshest winter driving conditions or humid coastal environments.
Flatbed trailers hauling industrial machinery, dry vans packed with dense freight, and bulk material carriers require immense, reliable stopping power. The 4718’s wide design provides the necessary friction to halt these massive loads safely and predictably. Its exceptional wear resistance translates directly to fewer maintenance intervals, allowing fleet managers to keep their long-haul transport vehicles on the road longer, thereby maximizing operational profitability and drastically reducing costly downtime.
Roll-off roof (ROR) waste trucks carrying heavy dumpsters and construction debris carriers operate in punishing, unpredictable environments. These vehicles constantly face sudden load shifts, stop-and-go urban traffic, and uneven terrain. The 4718 lining distributes braking forces evenly, absorbing the shock of sudden stops. Its heavy-duty construction withstands the abrasive dust, gravel, and debris common on construction sites, ensuring reliable performance when navigating tight, hazardous operational zones.
Whether executing cross-country routes or managing daily regional deliveries, commercial trailers demand consistent braking performance across vastly different climates. The 4718 lining adapts flawlessly to changing weather conditions, shedding moisture effectively in heavy rain or snow. Drivers experience predictable, linear braking feedback throughout extended trips, which significantly reduces driver fatigue and ensures cargo remains secure during sudden highway decelerations.
The 203.2 width is a fundamental upgrade for heavy-duty braking systems. By providing 60% more contact area than standard 127-width linings, it delivers three distinct operational advantages: 1) Faster, more controlled stops, which is absolutely critical when hauling maximum payloads; 2) A 30-40% longer service life due to reduced localized friction stress; 3) Significantly less fade, as the wider profile dissipates heat much faster. For high-demand trailers, this width directly translates to improved safety and operational efficiency.
While engineered specifically for drum size 419, true compatibility relies heavily on the physical space within your specific brake assembly. The expansive 203.2 width requires a wider shoe and more clearance than standard linings. We strongly advise checking your trailer’s technical manual for maximum lining width allowances or physically measuring the assembly space. Consulting a brake specialist is recommended to avoid fitment issues that could otherwise reduce performance.
Superior heat management is engineered directly into the 4718. It addresses extreme thermal buildup through two main mechanisms: 1) The wide surface area acts to spread and release heat quickly, drastically reducing the formation of dangerous hotspots; 2) Dingchi's heat-resistant materials retain their friction capabilities even at continuous operating temperatures of 600°F. This ensures consistent, reliable braking even after repeated heavy stops during downhill driving or intense urban routes.
To maximize performance and longevity, a proactive maintenance routine is essential: 1) Routinely inspect the lining thickness, ensuring it is strictly maintained above 12.0; 2) Keep the drum clean by removing heavy rust or glazing to ensure a proper mating surface; 3) Regularly check brake shoe alignment to completely avoid uneven, premature wear; 4) Strictly avoid overloading and stick to the 23,000 lbs GAWR limit. Following these specific steps can extend the service life of your braking system by 40% or more.
Beyond the physical product, we provide a comprehensive procurement experience designed to support large-scale fleet operations, regional distributors, and commercial vehicle manufacturers.
IATF 16949 Certified Quality Control: Manufactured in an advanced industrial facility, our production processes are fully certified under IATF 16949 international automotive quality management systems. This guarantees that every single batch of 4718 linings meets absolute consistency in friction performance, dimensional accuracy, and structural safety.
Mass Production & Guaranteed Lead Times: Equipped with highly efficient, standardized production lines, our facility boasts a massive daily manufacturing capacity. This operational scale allows us to fulfill high-volume orders without delay, ensuring a stable, uninterrupted supply chain and strictly adhered-to delivery schedules.
OEM-Grade Warranty & Rapid Response: We stand behind the durability of the 4718 lining with a clear 1-year OEM-grade quality guarantee. Should any operational inquiries arise, our dedicated support team guarantees an ultra-fast response time, providing immediate technical troubleshooting and practical, effective solutions.
Engineering Support & Customization: Supported by a team of veteran automotive engineers, we offer full OEM and ODM customization services. From initial blueprint verification and custom friction formulations to real-time production tracking and global logistics management, we provide an end-to-end procurement solution tailored to your exact specifications.
Industrial-Grade Secure Packaging: To ensure your components arrive in pristine condition, every shipment is secured using multi-layered industrial packaging. We utilize moisture-resistant PE film, thick foam cushioning, and reinforced wooden pallets or heavy-duty plywood boxes, guaranteeing zero transit damage during long-haul logistics and cross-border shipping.
