Dongfeng Xinjiang truck spare parts Flange with disc HD90129321017

Built to endure the extreme mechanical stress of truck operations—including high torque, axial pressure, and vibration—the flange with disc features a reinforced forged steel structure. It is manufactured from 42CrMo alloy steel (quenched and tempered to HRC 28-32), delivering a minimum tensile strength of 1080MPa and yield strength of 930MPa—far exceeding the requirements of standard carbon steel flanges. The disc-flange integration is achieved via hot forging (a process that enhances material density), eliminating weld seams that could fail under load. The mounting holes are precision-threaded (M12×1.75) and reinforced with a 2mm-thick boss around each hole, preventing thread stripping even under over-torque conditions. In durability tests, the flange maintains structural integrity after 100,000 cycles of torque fluctuation (500-800 N·m), ensuring reliable performance in heavy-haul or off-road applications

Designed to create an airtight or fluid-tight seal between connected components, the flange with disc incorporates a factory-engineered sealing structure. The disc’s mating surface is machined to a flatness tolerance of ≤0.03mm and a surface roughness of ≤0.8μm, ensuring full contact with the mating flange’s gasket (compatible with Dongfeng Xinjiang’s OE rubber or metal gaskets). A 1.5mm-deep sealing groove (located 5mm from the disc edge) holds the gasket in place, preventing displacement during installation or vibration. For high-pressure systems (e.g., hydraulic lines), the flange’s hub features a secondary O-ring groove (3mm width, 2mm depth) that accepts a nitrile rubber O-ring—creating a dual-seal barrier against fluid leaks. This sealing design ensures zero leakage even under pressure fluctuations (0-10MPa for hydraulic systems), avoiding costly fluid loss or environmental contamination

Engineered to resist corrosion from road salt, moisture, hydraulic fluids, and exhaust gases—the primary threats to flange components—the flange with disc features a comprehensive protective system. First, a zinc phosphate pretreatment layer (12μm) is applied to the steel surface to block rust at the substrate. Then, a high-temperature electrostatic powder coating (90μm) with epoxy-polyester composite is baked on, forming a scratch-resistant, chemical-resistant barrier that resists peeling even under exposure to exhaust heat (up to 200℃). For the disc’s mating surface (critical for sealing), a thin layer of anti-seize compound (compatible with hydraulic fluids and engine oil) is pre-applied, preventing corrosion between the disc and gasket. This coating system passes 1200-hour salt spray testing (per ASTM B117) with no red rust, ensuring durability for over 8 years in coastal, snowy, or high-humidity regions

Designed for efficient installation and reliable performance, the flange with disc undergoes CNC machining to achieve strict dimensional accuracy. Every critical feature—including the inner bore, keyway, mounting holes, and sealing groove—is manufactured to a tolerance of ±0.05mm, ensuring perfect alignment with mating components. The package includes 8 high-strength hexagon bolts (M12×30, grade 10.9) and lock washers (compatible with Dongfeng Xinjiang’s torque specifications: 80-90 N·m). Installation steps are straightforward: align the flange’s keyway with the shaft, position the disc against the mating flange (ensuring the gasket is seated in the sealing groove), insert the bolts through the mounting holes, and torque to the recommended value. No specialized tools (e.g., flange alignment tools) are required for most installations, and a professional technician can complete the process in 30 minutes or less. This easy installation design reduces labor costs and minimizes truck downtime—critical for commercial operations relying on continuous vehicle availability