Recently, Ningbo LSLong Machinery Co., Ltd. (hereinafter referred to as “LSLong”) disclosed progress in its deep collaboration with leading domestic automakers—serving as a designated precision parts supplier for Chery, BYD, and Geely, the company has mass-produced suspension brackets for their new energy and fuel-powered models for three consecutive years, with cumulative deliveries exceeding 800,000 sets. This has established it as a benchmark case in China’s automotive core components supply chain for “high precision, lightweight design, and high reliability.”

Focusing on “Stability” and “Lightweight” in Automotive: Technical Breakthroughs in Suspension Brackets

Suspension brackets are critical components connecting the engine/motor to the vehicle chassis, directly influencing vibration control, NVH (Noise, Vibration, and Harshness) performance, and driving safety. With the rise of new energy vehicles (NEVs), stricter requirements have been imposed on bracket lightweighting (to reduce energy consumption) and fatigue resistance (to adapt to high-frequency motor vibrations).

Since entering the automotive suspension bracket sector in 2015, LSLong has leveraged its full-chain capabilities in “mold design-die casting-precision machining-surface treatment” to develop customized solutions for different vehicle models. Take the suspension bracket recently mass-delivered for a Geely hybrid model, for example: using ADC12 aluminum alloy vacuum die casting, optimized mold flow channels, and cooling systems reduced weight by 40% compared to traditional cast iron brackets. Coordinate Measuring Machine (CMM) inspections ensured critical mounting hole tolerances within ±0.03mm, fully meeting OEM requirements for “lightweight + high rigidity.”

“Suspension brackets may seem simple, but they embody significant technical challenges,” said Wang Qiang, Head of LSLong’s Automotive Division. “For a pure electric platform bracket developed for Chery New Energy, we innovatively introduced magnesium alloy materials and laser welding. While maintaining strength, the bracket thickness was reduced from 8mm to 5mm, cutting single-set weight by 1.2kg and boosting vehicle range by approximately 2%.”

Full-Chain Quality Control: Building Trust with OEMs

LSLong’s ability to secure long-term partnerships with Chery, BYD, and Geely stems from its end-to-end quality management system spanning “mold to finished product.” The company is equipped with 8 die-casting machines (including 4 LK 500-ton high-pressure die casters), 20 machining centers (from brands like Makino and Fanuc), and 12 automatic CNC lathes, enabling integrated production of suspension brackets from blank casting to precision milling and drilling.

In testing, LSLong uses imported German flaw detectors (capable of identifying internal defects ≥0.1mm), Hexagon CMMs (with 0.002mm accuracy), and automated cleaning lines (to remove die-cast release agent residues), ensuring no porosity or cracks in each batch and surface cleanliness compliant with OEM VDA 19 standards. “We conduct sampling inspections of 30 sets for every 5,000 brackets produced, with 100% full-dimensional inspection coverage,” Wang Qiang noted. “Over the past three years, our product defect rate has remained below 0.02%, which is key to OEMs expanding their collaboration.”

From “Supplier” to “Collaborative Developer”: Supporting Domestic Automakers’ Global Ambitions

Beyond basic parts supply, LSLong is deeply involved in OEMs’ cutting-edge R&D. For BYD’s DM-i super hybrid system, the company jointly developed an “integrated suspension bracket” with BYD’s Powertrain Research Institute, merging separate motor and engine brackets. This reduces assembly steps while enhancing overall torsional stiffness. “This collaborative model not only shortens new model R&D cycles but also aligns our technological accumulation with industry trends,” commented Li Hua, Senior Purchasing Manager at BYD.

Chen Feng, Vice President of Chery Automobile Engineering Technology Research Institute, added: “LSLong’s rapid response capability is impressive. Last year, we required a new model bracket to go from design to mass production in three months. Through quick mold adjustments and parallel testing, they delivered prototypes two weeks ahead of schedule, helping us seize market opportunities.”

Targeting NEV Sector Growth: Expanding Global Collaboration

With China leading global NEV production and sales for eight consecutive years, demand for core components has surged. A LSLong executive stated the company plans to add 2 sets of 600-ton die-casting islands and intelligent testing lines, focusing on developing integrated, ultra-thin-walled suspension brackets. The goal is to increase NEV-related revenue to 60% within three years. “Collaborations with Chery, BYD, and Geely are the foundation of our roots in China’s automotive industry. Moving forward, we aim to leverage these OEMs’ global layouts to introduce ‘China’s precision manufacturing’ suspension brackets to overseas markets.”

From a mold workshop to a key automotive components supplier, LSLong has, over 13 years, validated the value of “focusing on niche sectors and deepening technical details” in manufacturing. As domestic automakers accelerate their rise, this “hidden champion” is using suspension brackets as a lever to tap into broader global component markets.