SA00-33-25XM1
Product Details
Comprehensive Professional Description: Haima S7 Front Brake Disc (Part No. SA00-33-25XM1)
1. Basic Overview & Core Functional Positioning
The SA00-33-25XM1 is an authentic Original Equipment Manufacturer (OEM) front brake disc, meticulously engineered and exclusively produced for the Haima S7, a mid-size SUV renowned for its reliability, off-road capability, and daily usability under the Haima Automobile brand. As a critical safety-critical component of the vehicle’s braking system, this front brake disc is specifically designed to work in tandem with the Haima S7’s front brake calipers, brake pads, and hydraulic system, playing an irreplaceable role in converting kinetic energy into thermal energy through friction, thereby decelerating or stopping the vehicle effectively. The part number SA00-33-25XM1 serves as a unique identifier, ensuring strict compliance with Haima’s original engineering specifications and global quality standards, making it the only authorized replacement for the front brake disc of all Haima S7 production years and trim levels.
For Haima S7 owners, whether using the vehicle for daily urban commuting, long-distance highway travel, or occasional off-road adventures, the reliability and performance of the SA00-33-25XM1 front brake disc are non-negotiable. The front brake system of a vehicle bears approximately 70-80% of the total braking force during deceleration, especially during emergency braking or high-speed driving, which means the front brake disc must withstand extreme pressure, high temperatures, and continuous friction without deformation or failure. A faulty or worn front brake disc can lead to severe safety hazards, including extended braking distance, brake fading, steering wheel vibration during braking, uneven braking force, and even brake failure—all of which significantly increase the risk of traffic accidents. As a genuine OEM component, the SA00-33-25XM1 is produced in strict accordance with Haima’s rigorous quality control standards, international automotive safety regulations (including ECE R90 and FMVSS 135), and the precise technical parameters of the Haima S7’s braking system, ensuring consistent performance, perfect fitment, and reliable safety support in all driving conditions. It is the preferred choice for professional automotive repair technicians and Haima S7 owners who prioritize safety, durability, and factory-grade performance.
Unlike generic aftermarket brake discs, the SA00-33-25XM1 is tailor-made for the Haima S7’s specific braking system configuration, including its caliper type, brake pad size, wheel hub dimensions, and hydraulic pressure parameters. This customization ensures that the brake disc integrates seamlessly with the vehicle’s existing braking components, eliminating compatibility issues and ensuring optimal braking performance. Whether replacing a worn brake disc due to normal use or a damaged one due to external impact or improper maintenance, the SA00-33-25XM1 can restore the Haima S7’s braking system to its original factory performance, providing drivers with the confidence of safe and responsive braking.
2. Premium Material Selection & Precision Manufacturing Process
The SA00-33-25XM1 front brake disc is crafted from high-performance, automotive-grade materials, selected specifically to meet the strict requirements of a safety-critical braking component—prioritizing high-temperature resistance, wear resistance, impact resistance, and thermal conductivity. The material selection is optimized to balance performance, longevity, and cost-effectiveness, ensuring the brake disc can withstand the harsh operating environment of automotive braking (including extreme temperature fluctuations, continuous friction-generated heat, road salt, moisture, and minor impacts) while delivering consistent, long-term reliability.
The core material of the SA00-33-25XM1 front brake disc is high-quality gray cast iron (Grade HT250), which is the industry standard for automotive brake discs due to its exceptional balance of hardness, toughness, thermal conductivity, and wear resistance. Gray cast iron HT250 features a fine, uniform graphite structure that enhances thermal conductivity, allowing the brake disc to quickly dissipate the large amount of heat generated during braking—critical for preventing brake fading (a phenomenon where braking performance decreases due to excessive heat buildup). Additionally, gray cast iron HT250 has excellent wear resistance, ensuring the brake disc maintains its structural integrity and dimensional accuracy even after prolonged use, reducing the frequency of replacement and long-term maintenance costs. The material also exhibits good impact resistance, able to withstand minor impacts from road debris or uneven road surfaces without cracking or chipping.
To further enhance the performance and durability of the SA00-33-25XM1, the brake disc undergoes a series of specialized surface treatments. The friction surface (the contact surface with the brake pads) is precision ground and polished to achieve a smooth, uniform finish with a specific surface roughness (Ra 0.8-1.6 μm), which ensures optimal friction between the brake disc and brake pads, improving braking efficiency and reducing brake noise. Additionally, the non-friction surfaces (including the hub mounting surface and the outer edge) are treated with a corrosion-resistant coating, which prevents rust and oxidation caused by exposure to road salt, moisture, and other environmental contaminants—especially critical for vehicles used in cold, snowy regions or coastal areas where corrosion is a common issue.
The manufacturing process of the SA00-33-25XM1 front brake disc follows a strict, ISO 9001 and IATF 16949 certified production workflow, combining precision casting, automated machining, and rigorous quality control—consistent with modern automotive brake component manufacturing standards. The production process begins with the preparation of raw materials: high-purity gray cast iron HT250 is melted in a controlled environment to ensure uniform composition and avoid impurities, which could compromise the brake disc’s performance. The molten iron is then poured into precision-designed molds using a sand casting process, which ensures the brake disc’s basic shape, dimensions, and internal structure meet Haima’s OEM specifications exactly. After casting, the brake disc is subjected to a heat treatment process (annealing and quenching), which optimizes the material’s microstructure, enhancing its hardness, toughness, and thermal stability. This heat treatment process also eliminates internal stresses generated during casting, preventing the brake disc from warping or cracking during use.
Following heat treatment, the brake disc undergoes a series of precision machining steps. The friction surface is ground using high-precision CNC grinding machines, ensuring uniform thickness, flatness, and surface roughness. The hub mounting holes and bolt holes are drilled and tapped with automated equipment, ensuring precise alignment and dimensional accuracy—critical for proper fitment with the Haima S7’s wheel hub and caliper. The outer edge of the brake disc is also machined to remove burrs and ensure a smooth, uniform finish. After machining, each SA00-33-25XM1 brake disc undergoes a series of rigorous quality inspections, including dimensional accuracy testing, flatness testing, hardness testing, thermal conductivity testing, and visual inspection. Dimensional accuracy testing verifies that the brake disc’s diameter, thickness, mounting hole spacing, and other key parameters match Haima’s OEM specifications. Flatness testing ensures that the friction surface is perfectly flat (with a maximum flatness deviation of less than 0.03 mm), preventing brake vibration and uneven wear. Hardness testing confirms that the material’s hardness meets the required standard (HB 180-220), ensuring wear resistance and durability. Only units that pass all inspections are packaged and delivered, guaranteeing that each SA00-33-25XM1 front brake disc meets Haima’s OEM standards and provides reliable performance. Additionally, the brake disc comes with a 12-month quality guarantee, reflecting the manufacturer’s confidence in its durability and reliability.
3. Structural Design & Key Integrated Components
The SA00-33-25XM1 front brake disc features a sophisticated, integrated structural design, meticulously engineered to match the Haima S7’s front braking system, ensuring seamless integration, secure attachment, and optimal braking performance. Its design is optimized to balance functionality, durability, and heat dissipation, while adhering to Haima’s original engineering standards and international safety regulations. The overall structure of the brake disc consists of a friction surface, hub mounting flange, cooling vanes, mounting holes, and bolt holes—all working together to deliver reliable braking performance, efficient heat dissipation, and perfect fitment.
The friction surface is the core functional component of the SA00-33-25XM1 front brake disc, designed as a circular, flat surface with a specific diameter and thickness tailored to the Haima S7’s braking system. The standard diameter of the SA00-33-25XM1 is 300 mm, with a thickness of 28 mm—optimized to provide sufficient friction area and structural strength to withstand the high braking forces experienced by the front wheels. The friction surface is precision ground to a smooth, uniform finish, which ensures consistent contact with the brake pads, improving braking efficiency and reducing brake noise. The surface is also designed with a slight cross-hatch pattern (created during the grinding process), which helps to remove brake dust and debris, preventing brake fade and uneven wear.
The hub mounting flange is a critical structural component that connects the brake disc to the Haima S7’s wheel hub. It is designed as a circular flange with a precision-machined mounting surface, which ensures a tight, secure fit with the wheel hub. The mounting surface is treated with a corrosion-resistant coating to prevent rust and ensure a stable connection, even under harsh environmental conditions. The hub mounting flange is integrated with the friction surface via a series of cooling vanes, which play a vital role in heat dissipation.
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