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FMSI#: 4720
Drum: 419
Arc Length: 189.1/194.6
Width: 127
Thickness: 21.2/17.5-20.0/12.0
Application: ROR,TRAILER
Leveraging deep expertise in commercial vehicle braking systems, Dingchi manufactures premium brake linings engineered specifically for demanding heavy-duty applications. The 4720 heavy-duty brake lining is meticulously formulated to support Gross Axle Weight Ratings (GAWR) of 20,000 lbs and 23,000 lbs, and even more, ensuring that extreme load environments are handled with absolute confidence. Upon physical inspection, the friction material presents a dense, uniform granular texture that speaks to its highly compressed manufacturing process, while the distinct, solid acoustic resonance when tapped indicates exceptional structural integrity devoid of internal voids. Dingchi brake linings rigorously comply with FMVSS 121 testing requirements, serving diverse heavy-duty transport operations with smooth and consistent braking performance, extended service life, and a comprehensive range of models designed precisely to meet exacting customer needs. By prioritizing operational safety and mechanical reliability, this component acts as a foundational element for fleet maintenance programs aiming to optimize safety metrics and operational efficiency.
At the core of the 4720 brake lining is a proprietary friction material developed exclusively for heavy commercial transit. This advanced formulation is engineered to deliver exceptional braking stability and superior resistance to thermal fade, even during prolonged downhill descents or aggressive stop-and-go scenarios. By meticulously balancing metallic and non-metallic compounds, the lining maintains an optimal coefficient of friction across a wide temperature spectrum. Fleet operators will notice a distinct lack of the acrid burning odor typically associated with inferior pads under intense thermal stress, as our material dissipates heat efficiently. This thermal resilience translates to predictable, fade-free stopping power that drivers can rely on, regardless of fluctuating environmental conditions or severe operational demands.
Heavy-duty transport requires components that do not flinch under immense pressure. Rated to support Gross Axle Weight Ratings (GAWR) spanning 20,000 to 23,000 lbs and beyond, this lining is built for the absolute limits of commercial hauling. The structural composition ensures that braking force remains smooth and exceptionally powerful. Key performance benefits under extreme loads include:
Consistent Deceleration: Efficiently converts the sheer kinetic energy of a fully loaded trailer into thermal energy without system degradation.
Mechanical Integrity: High physical density prevents premature crumbling, cracking, or glazing under severe mechanical stress.
Terrain Adaptability: Maintains reliable stopping power whether navigating steep downhill gradients or executing sudden stops on uneven surfaces.
Regulatory compliance is not merely a benchmark; it is a fundamental guarantee of operational security. The 4720 lining has been subjected to and rigorously passes the stringent FMVSS 121 (Federal Motor Vehicle Safety Standard) testing protocols. This certification provides fleet managers with the documented assurance that their vehicles are equipped with components meeting the highest international safety standards. The testing validates the lining's ability to perform under demanding pneumatic brake system requirements, ensuring rapid response times and balanced deceleration. By integrating these certified linings, transport operations significantly mitigate liability risks and enhance the overall safety profile of their rolling assets.
Dimensional accuracy is critical for avoiding installation delays and ensuring optimal mechanical engagement. Tailor-made specifically for ROR axles and a diverse array of heavy-duty trailers, the 4720 model features precisely engineered arc lengths of 189.1/194.6 mm and a width of 127 mm. This exact geometry guarantees a flawless interface with the 419 drum, eliminating uneven wear patterns and harmonic vibrations—often perceived as high-pitched squealing—caused by poor fitment.
Ideal Operational Scenarios:
Long-haul interstate logistics demanding sustained mechanical reliability over thousands of miles.
Heavy construction material transport requiring frequent, high-impact braking in urban environments.
Agricultural and bulk commodity hauling in challenging, dust-heavy off-highway conditions.
In the competitive landscape of commercial transport, minimizing vehicle downtime is paramount. The optimized anti-wear formulation of this brake lining significantly extends its operational lifespan, directly reducing the frequency of mandatory replacements. Mechanics will appreciate the clean, consistent wear indicator lines and the reduction of abrasive brake dust that typically fouls surrounding wheel components. By extending the maintenance intervals, fleets benefit from a substantial decrease in both direct parts procurement and indirect labor expenses. The long-term durability of the 4720 lining ensures that vehicles spend less time on the service lift and more time generating revenue on the road.
Backed by decades of profound experience in commercial vehicle braking system manufacturing, every single 4720 brake lining undergoes a rigorous quality control regimen. Our advanced production facilities utilize automated pressing and curing technologies to ensure that the thickness—ranging precisely from 21.2/17.5 to 20.0/12.0 mm—remains absolutely consistent across every production batch. This unwavering commitment to manufacturing excellence guarantees that whether you are outfitting a single trailer or standardizing an entire national fleet, the performance and physical specifications of the first brake lining will be identical to the thousandth, ensuring predictable maintenance schedules across the board.
