From Aerospace to Ground: Okly Achieves Breakthrough in Mass Production of Cost-Effective Magnesium-Aluminum Alloy Gears

At Phoenix Lake Industrial Park in Yongchuan High-Tech District, Chongqing, a batch of magnesium-aluminum alloy gears is steadily rolling off the production line at Okly Intelligent Equipment. These seemingly ordinary gears represent a material revolution, transitioning from aerospace to ground equipment applications.

Okly (Chongqing) Intelligent Equipment Technology Co., Ltd. has overcome mass production challenges for magnesium-aluminum alloy gears, achieving a monthly production capacity of hundreds of thousands of high-precision gears. Derived from aerospace materials, these gears cost only 15% more than traditional gears but offer twice the lifespan, marking a major breakthrough for China in high-end gear manufacturing.

01 Material Revolution: Democratizing Aerospace Technology

Magnesium-aluminum alloy has long been exclusive to aerospace applications. With a density of just 1.8 g/cm³ (23% that of traditional steel gears), it offers exceptional strength-to-weight ratio and vibration damping properties.

However, applying this material to ground equipment faced three major challenges:

• Formation defects: High magnesium reactivity led to over 3% casting porosity, causing microcracks.

• Cost constraints: Aerospace-grade raw materials cost 2.5 times more than traditional alloys, limiting large-scale application.

• Operational compatibility: Ground equipment endures 47% higher impact load frequencies than aerospace environments, requiring material reformulation.

Okly’s technical team solved these issues through rare-earth ratio reconstruction: "By optimizing the rare-earth element ratios in aerospace-grade magnesium-aluminum alloy and substituting yttrium for partial cerium, we maintained fatigue strength while reducing raw material costs by 15%."

02 Technological Breakthrough: Solving Four Mass Production Challenges

Enhanced Material Stability

Developed a new Mg-Al-Si series special alloy by adding rare-earth elements yttrium (Y) and neodymium (Nd), significantly improving material stability. After heat treatment, metallographic uniformity increased by 40%, and the thermal deformation coefficient reduced to 1.2×10⁻⁶/°C.

Precision Manufacturing Process

Utilized German KAPP five-axis grinding machines paired with a proprietary intelligent compensation system to correct machining errors in real time. Online laser interferometry checks every 30 minutes ensured tooth profile errors remained within ±3μm, meeting ISO1328’s highest accuracy standards.

Surface Enhancement Innovation

Incorporated aerospace-derived magnetorheological polishing technology to achieve tooth surface roughness of Ra0.2μm and surface residual compressive stress of -980MPa, significantly delaying fatigue crack initiation.

Digital Twin System

Built a full lifecycle digital model of the gear, using multi-physics coupling simulations to predict failure risks under various conditions. Testing under 300% overload scenarios in new energy trucks confirmed the gear set’s safety.

03 Mass Production Achievement: From Lab to Production Line

Okly invested 250 million RMB to build an intelligent production line achieving large-scale mass production:

• 36 German KAPP and Swiss Reishauer grinding machines

• Integrated online inspection and intelligent sorting systems

• Yield rate reached 99.8%

• Monthly production capacity of 500,000 units

The gears demonstrated exceptional performance during 180 days of reliability testing:

• Endurance test: 200 million cycles at rated load (equivalent to 15 years of HSR gate operation)

• Overload test: 1 million cycles at 300% rated load impact

• Environmental test: -40°C to 150°C temperature variation

• Contamination test: Operation in highly polluted oil

All test samples showed no pitting, spalling, or fractures, with wear under 2μm, fulfilling the promise of "lifetime maintenance-free" reliability.

04 Market Applications: Proven Value Across Three Industries

The gear series has already secured bulk orders from industry leaders:

A BYD E-drive Division representative stated: "Okly’s gears improved our e-drive system’s NVH performance by 3dB and doubled its lifespan—a major breakthrough for new energy vehicles."

At Shenzhen Yantian Port’s gantry crane retrofit project, 32 cranes use the same gear components: "The slewing mechanism’s weight reduction of 1.2 tons lowered the center of gravity by 0.8 meters, increased wind resistance to Level 15, and eliminated biweekly maintenance shutdowns."

05 Industry Impact: Reshaping Gear Manufacturing Competitiveness

Okly’s mass production breakthrough is having a profound industry impact:

Restructured Cost Equation

With 2025 magnesium prices stabilizing at 18,000 RMB/ton (6% below aluminum), combined with process optimizations, magnesium-aluminum gears cost only 15% more than traditional products—while delivering a 300% increase in lifecycle ROI.

Shift in Manufacturing Paradigm

Large-scale integrated die-casting reduced gear production cycles from 72 hours to 4 hours, increasing yield rates to 99.5%. Flexible production lines allow switching between gears for three industries on the same line, achieving 95% capacity utilization.

Evolution of Standards

Participation in drafting the "Technical Specifications for Lightweight Gears in Transportation Equipment" has driven a 400% increase in magnesium-aluminum alloy adoption in brake calipers, steering knuckles, and other applications over three years.

06 Future Outlook: Integrated Air-Land-Sea Development Path

With the rise of the low-altitude economy, Okly is expanding into new areas:

• eVTOL ultra-light transmission systems: Developing -40°C cryogenic gears for Wanfeng Diamond electric aircraft with high torque density requirements.

• Spaceborne precision transmission: Partnering with Aerospace Science and Industry Corporation to develop satellite deployment mechanism gear modules, increasing precision lifespan fivefold in vacuum environments.

• Marine corrosion-resistant transmission: Micro-arc oxidation technology reduces salt spray corrosion rates to 0.003mm/year, enabling deep-sea equipment applications.

Experts note that the magnesium alloy industry has reached an inflection point, experiencing a once-in-a-decade "cost-performance" scissors difference driving penetration rates from 0→1. Demand CAGR over the next three years may exceed 50%, far exceeding market expectations.

Tesla’s Optimus already uses magnesium alloy shells comprehensively for actuators and motor housings, achieving weight reduction, cost reduction, and improved heat dissipation.

At Shenzhen Yantian Port, 32 gantry cranes equipped with Okly’s magnesium-aluminum alloy gears operate around the clock, increasing daily throughput per machine by 22% while reducing energy consumption by 8%. These aerospace-derived gears are quietly driving the lightweight revolution in Chinese high-end equipment.