4221100
Brand: Dongfeng
Model: H30
product name：Rear Control Arm
Part Number: 4221100
Product Details
Comprehensive Professional Description: Dongfeng H30 Rear Control Arm (Part No. 4221100)
1. Basic Overview & Core Functional Positioning
The 4221100 is an authentic original equipment manufacturer (OEM) rear control arm, also referred to as a rear suspension control arm or trailing arm, precision-designed and manufactured exclusively for Dongfeng H30 compact sedan models. As a core load-bearing component of the vehicle’s rear suspension system, this control arm plays a pivotal and irreplaceable role in connecting the rear wheel hub assembly, rear axle, and vehicle body frame, undertaking critical functions that directly determine driving stability, handling performance, ride comfort, and overall driving safety. It is a foundational suspension part that maintains accurate rear wheel positioning, absorbs road shocks and vibrations, transmits driving and braking forces, and restricts abnormal movement of the rear wheels during vehicle operation.
Mounted on the rear chassis of the Dongfeng H30, this rear control arm operates in a demanding working environment, enduring continuous alternating loads, vertical impact forces from uneven roads, lateral forces during cornering, and torsional forces during acceleration and braking. It works in coordination with rear shock absorbers, coil springs, stabilizer bars, and other suspension parts to form a complete rear suspension system, balancing rigidity and flexibility to adapt to various road conditions, including urban paved roads, rural rough roads, and highway driving. For the Dongfeng H30, a practical compact sedan built for daily commuting, family travel, and long-distance highway use, the structural integrity and performance of this control arm are directly linked to the vehicle’s dynamic performance and driving safety.
A worn, deformed, cracked, or damaged rear control arm will lead to a host of chassis faults, including abnormal rear wheel alignment, uneven tire wear, vehicle deviation, chassis rattling and abnormal noise, poor handling stability, and increased vibration during driving. In severe cases, it can cause loss of control during high-speed driving or sharp turns, posing a major safety hazard. As a genuine OEM component, the 4221100 rear control arm is produced in full compliance with Dongfeng’s original factory engineering standards, material specifications, and dimensional tolerances, delivering consistent performance, perfect fitment, and long-lasting durability. It stands as the only reliable replacement solution for suspension maintenance, chassis overhaul, and fault repair, capable of restoring the Dongfeng H30’s factory-grade suspension performance, handling stability, and ride comfort.
2. Premium Material Selection & Precision Manufacturing Process
The 4221100 rear control arm is crafted from high-strength automotive-grade structural materials, selected in strict accordance with Dongfeng’s OEM quality requirements and commercial vehicle suspension component standards, prioritizing exceptional tensile strength, torsional rigidity, impact resistance, fatigue resistance, and corrosion resistance to withstand long-term cyclic loads and harsh road impacts without deformation, fracture, or fatigue failure.
The main arm body adopts high-strength low-alloy steel, a premium material widely utilized for automotive suspension control arms due to its outstanding mechanical properties and fatigue resistance. This heavy-duty steel material features high yield strength and tensile strength, capable of bearing heavy vertical, lateral, and torsional loads without permanent deformation or cracking under extreme driving conditions. Compared with ordinary carbon steel, it exhibits superior fatigue resistance, enabling it to endure millions of times of alternating loads without developing fatigue cracks, ensuring a long service life even under prolonged harsh use.
For critical stress areas and mounting bases, the control arm adopts integrated stamping and forging processes, further enhancing local structural strength and eliminating potential weak points caused by splicing. The surface of the control arm undergoes a professional anti-corrosion treatment, including electrophoretic coating and powder coating, forming a dense and durable protective layer that effectively resists rust, corrosion, and abrasion from mud, water, snow, and road salts. This anti-corrosion treatment ensures the control arm remains structurally intact and free from rust damage in humid, cold, and coastal environments.
The manufacturing process of the 4221100 rear control arm follows a strict industrial-grade production workflow, starting with precision stamping and cold forging of high-strength steel blanks to form the basic arm structure, ensuring uniform material distribution and dense internal structure without pores, cracks, or inclusions. Next, CNC machining technology is applied to process mounting holes, bushing seats, and ball joint seats with micron-level dimensional accuracy, guaranteeing a perfect fit with the original vehicle’s chassis mounting points and mating parts.
After forming and machining, the control arm undergoes integral heat treatment, including quenching and tempering, to optimize internal stress and enhance overall toughness and rigidity, striking a perfect balance between strength and impact resistance. The surface anti-corrosion treatment is carried out under fully automated controlled conditions, ensuring uniform coating thickness and strong adhesion. Before leaving the factory, every single control arm undergoes rigorous quality inspections, including dimensional accuracy testing, hardness testing, fatigue load testing, and corrosion resistance testing, ensuring 100% compliance with OEM standards and eliminating defective products.
3. Structural Design & Key Integrated Components
The 4221100 rear control arm features a high-rigidity, lightweight integrated structural design, meticulously engineered to match the rear suspension layout of the Dongfeng H30. Its streamlined, curved arm design maximizes structural strength while minimizing unnecessary weight, avoiding interference with other rear chassis components such as the rear axle, shock absorbers, brake lines, and exhaust system during suspension compression and rebound.
The core structure consists of the main steel arm body, two integrated rubber bushings (also known as silent blocks) at the body mounting end, and a precision mounting seat for connecting the wheel hub or rear knuckle. Each component is designed for a specific functional purpose, working together to deliver stable suspension support and effective vibration isolation.
The large rubber bushing at the front mounting end (body connection end) is a key damping component, made of high-density natural rubber and synthetic rubber composite material with high elasticity and wear resistance. This bushing is vulcanized and bonded firmly to the control arm and chassis mounting bracket, serving to isolate road vibrations and chassis noise, absorb minor impacts, and reduce the transmission of harshness to the vehicle cabin, significantly improving ride comfort. It also allows for proper rotational and torsional movement of the control arm during suspension travel, ensuring flexible suspension operation without generating abnormal noise.
The rear mounting bushing is designed with higher rigidity to provide stable lateral support, enhancing the control arm’s ability to resist lateral forces during cornering and maintaining accurate rear wheel positioning. Both bushings are wear-resistant, aging-resistant, and oil-resistant, capable of withstanding long-term compression, torsion, and exposure to mud and water without hardening, cracking, or loosening, ensuring consistent damping and support performance.
The control arm is equipped with precision-machined mounting holes and fixing brackets, perfectly matching the original chassis mounting points of the Dongfeng H30. The holes are processed with high smoothness and accurate positioning, ensuring firm and stable installation without deviation, looseness, or abnormal noise during driving. The overall structure is reinforced with integrated ribs at high-stress areas, further improving torsional rigidity and load-bearing capacity, preventing deformation under heavy loads and impacts.
Contact us
Leave your messages
