Explore our premium range of ISO and API-certified lubricants. Engineered to reduce friction, minimize wear, and maximize equipment lifecycle under extreme thermal and mechanical loads.
In modern B2B industrial systems, gearboxes operate under increasingly harsh environments. These include higher torque densities, shrinking sump volumes, and extreme ambient operating temperatures. At Shandong Longhai Lubrication Technology Development Co., Ltd., our gear lubricants are engineered to address these challenges directly. They prevent surface fatigue phenomena such as micropitting, scuffing, and bearing wear.
Our products feature advanced chemical structures that integrate high-viscosity-index Group II and Group III base oils with polyalphaolefins (PAO) and synthetic ester basestocks. This ensures excellent shear stability and oxidation resistance. Consequently, the oil maintains its protective fluid film even when exposed to continuous high-shear forces. This technology significantly extends service intervals and prevents unplanned equipment downtime.
Operating across a massive 131-acre smart manufacturing plant in Zibo, Shandong, our facility boasts an annual production capacity of 200,000 tons. With fully computerized, multi-kettle automatic blending lines, we maintain batch consistency across all production runs, scaling from specialty orders to bulk distribution seamlessly.
Our filling lines feature automatic mass flow metering controls that guarantee filling accuracy within 1‰ to 2‰. By integrating automated capping, labeling, and palletizing robots, we have increased packing speed by 20% to 35%, ensuring high-speed processing and quick delivery times.
Located in Shandong province, our factory benefits from direct, high-capacity road and rail networks linked directly to Qingdao Port. This proximity enables efficient containerization, streamlined customs clearance, and reduced maritime shipping costs for our global B2B clients.
To operate successfully as a premier global exporter, product safety and quality consistency are paramount. Our factory processes and formulations strictly adhere to global quality, environmental, and occupational health systems.
Shandong Longhai has passed ISO 9001:2015 (Quality Management), ISO 14001:2015 (Environmental Management), and ISO 45001:2018 (Occupational Health & Safety Management) certifications. Crucially, our products meet key international certifications, including Mercedes-Benz transmission approval, and conform to standards established by ASTM, DIN, AGMA, and API.
Additionally, all products are covered by liability and quality insurance underwritten by PICC (People's Insurance Company of China), providing an extra layer of financial security for international importers and commercial fleets.
ISO 9001
ISO 14001
ISO 45001
Management Cert
Compliance Cert
PICC Insured
We support global brands, heavy industrial operations, and distributors with customized formulation engineering, flexible packaging options, and complete logistics support.
Our laboratory develops high-performance gear oils ranging from ISO VG 68 to ISO VG 1000, formulated with premium polyalphaolefins (PAO), synthetic esters, or mineral basestocks. Formulations are custom-tailored to meet specific temperature extremes, load capacities, and regulatory standards, including API GL-4, GL-5, and DIN 51517-3.
We offer testing services for kinematic viscosity, copper corrosion resistance, four-ball wear scar diameter, and demulsibility index to verify the performance profile of every custom formulation.
The table below details the typical physical and chemical characteristics of our standard industrial gear lubricant oils. This comparison highlights our products' high viscosity stability, low pour points, and robust extreme-pressure performance across common ISO grades.
| ISO Viscosity Grade | Kinematic Viscosity @ 40°C (mm²/s) | Kinematic Viscosity @ 100°C (mm²/s) | Viscosity Index (VI) | Pour Point (°C) | Flash Point (COC, °C) | Four-Ball Weld Load (N) |
|---|---|---|---|---|---|---|
| ISO VG 150 | 142.5 - 157.5 | 14.5 | ≥ 98 | ≤ -18 | ≥ 230 | ≥ 2450 |
| ISO VG 220 | 209.0 - 231.0 | 18.8 | ≥ 97 | ≤ -15 | ≥ 240 | ≥ 2940 |
| ISO VG 320 | 304.0 - 336.0 | 24.2 | ≥ 96 | ≤ -15 | ≥ 240 | ≥ 2940 |
| ISO VG 460 | 437.0 - 483.0 | 30.5 | ≥ 95 | ≤ -12 | ≥ 250 | ≥ 3136 |
| Synthetic PAO 220 | 218.0 - 225.0 | 26.5 | ≥ 155 | ≤ -42 | ≥ 260 | ≥ 3920 |
*Note: The values shown above represent typical production averages. Custom modifications to viscosity indices, pour points, and weld load limits are available upon request through our R&D department.
Modern wind turbine main gearboxes endure dynamic vibrational forces and sudden load variations under extreme temperatures. Our synthetic polyalphaolefin (PAO) gear oils prevent micropitting, reduce mechanical drag, and limit oil oxidation, ensuring reliable performance in offshore and remote locations.
For heavy machinery operating in dusty, high-load mining environments, our extreme pressure (EP) gear lubricants resist abrasive wear and prevent particulate contamination. This helps protect ball mill drives, draglines, and conveyor gearboxes from premature component failure.
Marine gearboxes require lubricants with exceptional demulsibility to handle potential water ingress. Our marine-grade gear oils separate water contaminants quickly, protecting gear sets from corrosive pitting and maintaining load-carrying capacity in seawater environments.
To facilitate hassle-free global shipping and importation, our logistics and compliance departments provide dedicated localization services:
Engineered for extreme performance and trusted by industrial plants and commercial transport fleets worldwide.
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We review equipment specs, operating temperature targets, and regional import rules.
Our laboratory formulates or refines additive packages to meet performance profiles.
Comprehensive testing (viscosity, pour point, wear scar) with third-party verification.
Computerized blending and high-speed packaging under strict ISO quality checks.
Safe loading, customs document clearance, and ocean transport tracking.
Take a look inside our R&D joint innovation center, high-precision laboratories, and clean production environment in Zibo, Shandong.
Find technical guidance, selection parameters, and commercial details answered by our lubrication engineers.
API GL-4 gear oils are formulated with moderate extreme pressure (EP) additive levels. They are typically used in manual gearboxes and spiral bevel axles where speed and load criteria are moderate. In contrast, API GL-5 gear oils contain twice the concentration of EP additives (such as sulfur-phosphorus complexes). This makes them suitable for hypoid gear differentials in heavy-duty vehicles, where gears endure high sliding velocities and high torque loads. However, the high active sulfur in standard GL-5 oils can corrode soft yellow metals (like bronze synchromesh gears) in manual transmissions, so it is crucial to select the correct specification.
Micropitting is a type of surface fatigue that causes microscopic cracks and material loss, leaving gears with a dull, frosted finish. Over time, it can lead to macro-pitting, gear tooth breakage, and total gear failure. In modern compact industrial gearboxes operating under high loads, using an oil tested to resist micropitting (such as compliance with DIN 51517-3 or FVA 54 standards) is essential to preserve the gear tooth profile and ensure a long machinery lifecycle.
Synthetic PAO gear oils are recommended for applications with extreme operating temperatures (below -20°C or above 100°C), where mineral oils degrade quickly. PAO gear lubricants offer high viscosity indices (typically >150), excellent shear stability, low pour points, and superior thermal oxidation stability. These properties reduce drag, lower operating temperatures, and extend oil drain intervals by up to three times compared to standard mineral lubricants.
Our factory operates under three core management standards: ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018. Additionally, our automatic transmission lubricants carry official OEM approvals, including Mercedes-Benz certification. Every export batch is accompanied by a laboratory Certificate of Analysis (COA) confirming viscosity, pour point, flash point, and wear scar parameters match specification sheets.
For standard bulk orders, our lead time is typically 15 to 21 days from order confirmation to port delivery. We offer flexible packing formats, including 200L steel drums, 1000L IBC tanks, and bulk flexitanks for large-scale shipments. We also handle full container loading (FCL), pallet packaging, and seaworthy container bracing to ensure zero damage during maritime transit.
In addition to industrial gear oils, we manufacture and export a wide range of specialized transmission fluids, engine oils, refrigeration oils, and compressor lubricants to meet diverse commercial demands.
Established in 2009 and headquartered in Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. is a high-tech enterprise integrating lubrication research, product formulation development, precision blending, and global marketing. Over 15 years, the company has built a comprehensive industrial supply chain system, delivering high-performance lubrication solutions to clients in industrial machinery, transportation, marine, and power generation sectors.
We market our products under our proprietary brand "Century Longhai" and our strategic international brand "A Ba" (licensed from the UK). Our extensive product range includes heavy-duty diesel engine oils, gasoline motor oils, gear oils, hydraulic transmission fluids, anti-wear hydraulic fluids, specialized engineering machinery lubricants, natural gas engine oils, full synthetic industrial lubricants, automotive urea solutions, antifreeze, motorcycle engine oils, automatic transmission fluids (ATF), and specialty industrial lubricants.
We are committed to our core philosophy: "Dare to explore, innovate continuously, survive by quality, and promote development by efficiency." Guided by these principles, we continue to serve our international partners with high-quality lubricants and reliable B2B support.
Are you looking for a reliable OEM manufacturer or bulk gear lubricant exporter in China? Contact our engineering team for customized formulations, test samples, and pricing inquiries.
Headquarters: Zibo City, Shandong Province, China
Plant Capacity: 200,000 Tons / Year
R&D Scope: Custom Viscosity Profiles, OEM/ODM Labeling, Global Bulk Shipping Logistics
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