A21-2909020 Control Arm for Chery

Product Introduction

A21-2909020 control arm for Chery

As the core skeleton of the suspension system, it precisely connects the wheels and the body. Leading three core performance indicators:

● Steering control: transmit steering commands through ball joints

● Suspension geometry: Maintain tire positioning parameters (toe in/camber angle)

● Impact buffering: Collaborative shock absorbers absorb road vibrations

Technological breakthrough:

● Military grade material: SAE 8620 alloy forged into shape

● Lifetime lining: polyurethane+steel wrapped structure

● Accurate adaptation: 3D laser scanning of original factory data

Product Advantage

1. [Military Forging] SAE 8620 alloy forging+1200MPa tensile strength

Adopting military grade hot forging technology, the density is increased by 30% compared to castings, and the tensile strength reaches 1200MPa. Through 200000 bench fatigue tests, the risk of casting control arm fracture has been completely solved, ensuring the safety of heavy-duty off-road/rough road surfaces.

2. [Zero deviation positioning] CNC calibration hole position+0.1mm tolerance control

The ball head seat and liner hole are precision machined by five axis CNC, with a positional tolerance of ≤ 0.1mm. This eliminates the need for abnormal tire wear and steering wheel deviation correction.

3. [Lifetime liner] Hydraulic polyurethane liner+500000 swing tests

Patent three-layer liner: outer steel shell+hydraulic oil chamber+inner polyurethane. Improved deformation resistance by 300%, passed 500000 swing tests, and ended the stubborn problem of chassis pit noise.

4. [Double helmet rust prevention] Cathodic electrophoresis+zinc aluminum coating+800h salt spray protection

After phosphating treatment of the substrate, the composite coating passed an 800 hour salt spray test. Resist snow melting agents/seawater corrosion and solve the hidden danger of arm rust penetration in coastal areas.

Technical Parameters

1. Main structure

Manufacturing process: SAE 8620 alloy steel hot die forging (density 7.85g/cm ³)

Tensile strength: 1200 ± 50MPa

Surface treatment: phosphating layer+cathodic electrophoresis (20 μ m)+zinc aluminum coating (15 μ m)

2. Geometric accuracy

Ball head seat tolerance:

Aperture: Ø 32 ± 0.05mm

Taper: 1:10 ISO 4038

Lining hole position:

Spacing tolerance: ± 0.1mm

Parallelism: ≤ 0.15mm/100mm

3. Mechanical properties

Fatigue life: Passed 200000 bench tests according to SAE J267 standard

Destructive load: Static pressure ≥ 15kN (original parts 9kN)

Elastic deformation: Full load deformation<0.3mm (room temperature)/<0.5mm (-30 ℃)

4. Lifetime lining system

Structural design: Three layer composite (outer cold-rolled steel shell+middle hydraulic oil chamber+inner polyurethane)

Shore hardness: 90A ± 5 (compressive deformation resistance<5%)

Swing lifespan: 500000 cycles

Working temperature: -40 ℃~120 ℃ (maintaining elasticity at low temperatures)

5. Rust prevention and protection

Salt spray test: 800 hours of neutral salt spray

Chemical resistance: tested by soaking in 5% snow melting agent (240 hours without corrosion)

6. Installation and adaptation

Bolt torque:

Subframe connection: 100-120 N · m

Ball head locking nut: 75-85 N · m

Free positioning rate: 52% of models support installation in the original hole position (positioning parameter deviation<0.2 °)

7. Quality control certification

Production standards: IATF 16949+VDA 6.3

Testing items:

100% magnetic particle inspection (crack detection rate of 0.02mm)

5% spot check three coordinate measurement (accuracy 0.003mm)

Product Uses

Here are specific application scenarios of control arm:

1. Chassis noise terminator

Is there a "clunking" metallic impact sound when passing over a speed bump? This is caused by the aging of the lining, which leads to the control of the arm frame quantity. Patent hydraulic polyurethane liner eliminates connection gaps and restores chassis integrity.

2. Savior for tire uneven wear

Abnormal wear on the inner side of the front wheel? Controlling the deviation of the arm ball head seat hole position is the culprit. CNC 0.1mm tolerance locks the original factory positioning parameters.

3. Rust prevention is essential in snowmelt areas

North winter chassis corrosion and perforation? The double helmet coating blocks the corrosion of the snow melting agent and prevents accidents caused by the fracture of the control arm.

4. Tool for repairing accident vehicles

Repeated failure of four-wheel alignment after collision? The non positioning design skips the calibration of the subframe, saving 50% of accident repair labor costs.

Product Operate Guide

1. Pre inspection preparation

Lift+ASME bracket fixed vehicle (single jack operation strictly prohibited!)

Mark the original angle of the ball head/liner (with the assistance of a positioning ruler)

2. Lining treatment

Apply special lubricating grease to the new lining (engine oil is prohibited!)

The hydraulic lining arrow points in the direction of travel (German cars facing forward/American cars facing backward)

3. Precise installation

Lock according to the calibrated torque:

Subframe bolt: 100-120N · m (cross tightened in three times)

Ball nut: 75-85N · m (pneumatic wrench is prohibited!)! ）

4. Required inspection items

Place on the ground for 1 hour to check the pre pressure of the lining (gap<0.5mm)

Road test: Make a sudden turn at 50km/h to confirm there is no "metal pulling sound"

FAQ

Q1: Are you manufacturing company?

A: Yes. We are factory, located in Guangzhou. Our factory has certificate of lATF 16949.

Q2: What are your main products?

A: We have steering rack ,steering pump ,wheel hub and bearing ,drive shaft ,alternator,control arm and so on.

Q3: What is the lead time?

A: lt takes 3-7 days when stock is available, and 15-40 days when out of stock.

Q4: What is the warranty?

A: Our guarantee period is 60,000 kilometers or 1 year.

Q5: Do you have samples?

A: Yes, we have samples available. For bulk orders, please inquiry us for more details.