Explore our high-performance synthetic lubricants engineered to perform under extreme pressure and severe thermal conditions.
In the contemporary industrial and manufacturing landscapes, power transmission systems operate under historically unprecedented levels of mechanical stress, torque, and severe thermal cycles. High-performance industrial lubricants, such as the Top Activa Gear Oil, are no longer treated as passive maintenance consumables. Instead, they function as critical, active engineering elements within gearbox units, wind turbines, automotive drivetrains, and precision reduction units.
Modern industrial gearboxes demand lubricants that can actively prevent surface distress phenomena—most notably micro-pitting, scuffing, and rolling contact fatigue. The structural optimization of gears, combined with the reduction of lubricant reservoir sizes, places an extreme thermal load on the oil film. Standard mineral base oils degrade rapidly under these parameters. Our high-efficiency synthetic and semi-synthetic gear oils utilize advanced polyalphaolefin (PAO) and premium ester chemistry to guarantee shear-stable protective boundaries and prolonged drain intervals.
Established in 2009 and strategically headquartered in the petrochemical hub of Zibo, Shandong, China, Shandong Longhai Lubrication Technology Development Co., Ltd. has positioned itself as a premier global high-tech enterprise. For over 15 years, the organization has consistently engineered, manufactured, and distributed elite-tier lubrication solutions for the global industrial, engineering, and heavy-duty transportation sectors.
The company commands a complete, integrated industrial chain system. Under its proprietary domestic brand "Century Longhai" and its strategic international collaborative brand, the British "A Ba" series, it supplies a diversified catalog of lubricating products. The portfolio includes diesel engine oil, gasoline engine oil, gear oil, hydraulic transmission oil, anti-wear hydraulic oil, special engineering machinery oil, natural gas engine oil, fully synthetic fluids, automotive urea solutions, antifreeze, motorcycle oil, and specialized industrial oils. Crucially, the brand’s stability and performance are fully backed by PICC (China People's Insurance Company) quality insurance, offering absolute peace of mind to our worldwide industrial client base.
Harnessing advanced automation, precision control systems, and raw material optimization to provide world-class wholesale solutions.
Our operations leverage sophisticated DCS (Distributed Control Systems) to monitor additive-to-base-oil ratios in real-time. This guarantees standard-compliant shear rates, stable dispersion, and long-term emulsion resistance across all manufactured lubricants.
Longhai's filling packaging lines are engineered on high-precision volumetric metering principles. While reducing material loss, this technology accelerates operational filling speeds by 20% to 35%, scaling our ability to meet urgent global export deadlines.
Every single batch of Top Activa Gear Oil undergoes strict laboratory QC. Viscosity Index (VI), Flash Point (COC), Pour Point, Copper Corrosion (3h at 100°C), Demulsibility, and FZG Scuffing Load Stage tests are conducted prior to shipment.
Translating extreme-pressure chemistry into robust operations across diverse geographical climates and industrial conditions.
In open-pit mining environments across South America, Australia, and Northern Asia, gearboxes driving bucket wheel excavators, heavy crushers, and haulage trucks face intense vibrations, heavy dust exposure, and fluctuating loads. Activa heavy-duty gear oil formulations utilize resilient boundary lubrication additives that resist shocks and prevent micropitting under severe pressures, maintaining operational safety and extending system lifetimes.
Offshore and onshore wind turbines are characterized by highly remote locations, wide ambient temperature changes, and challenging service intervals. Our fully synthetic gear oils offer low-temperature fluidity alongside high-temperature viscosity retention. This guarantees efficient power transmission, minimizes mechanical drag at startup, and reduces high-cost crane-maintenance interventions for offshore wind platforms.
Tailoring lubricant formulas, viscometrics, certifications, and high-tech packaging solutions to meet specific target market needs.
Tailored fully synthetic and semi-synthetic gear oils conforming to API, DIN 51517, and OEM specifications.
Packaging formats from 1-liter bottles for retail to 200-liter drums for bulk industrial consumers.
On-site validation, third-party lab verification, and custom technical dossier generation for approvals.
Fast ocean freight, container consolidation, customs clearance, and export document handling.
Determine Viscometrics & Application Specs
Blend base stocks and additives
Run FZG, oxidation, and shear tests
Precision automated mixing and packaging
Safe sea/rail freight and technical support
Operating under rigorous global frameworks, Longhai maintains international manufacturing standards to ensure product uniformity.
The enterprise operates in strict accordance with ISO 9001:2015 (Quality Management Systems), ISO 14001 (Environmental Management Systems), and ISO 45001 / OHSAS 18001 (Occupational Health & Safety). Our automatic transmission lubricants have successfully secured prestigious Mercedes-Benz OEM approvals, proving our engineering and blending capacities meet the most demanding automotive standards globally.
Inside our digital plant, joint innovation center, and high-tech quality inspection facilities.
Get professional answers regarding formulation selection, wholesale logistics, and performance specifications.
L-CKC and L-CKD classification stands for industrial gear lubricants categorized under the ISO 6743-6 standard. L-CKC gear oils are specifically formulated for medium-load enclosed gear systems. They rely primarily on standard sulfur-phosphorus anti-wear packages. L-CKD gear oils are engineered for heavy-duty industrial gears operating under extreme pressure (EP) conditions. They provide enhanced micro-pitting resistance, improved thermal-oxidation stability, superior demulsibility, and a higher viscosity index. This helps protect mechanisms from scuffing under severe shock loads.
Micro-pitting is a surface distress phenomenon that manifests as microscopic cracks and craters on gear tooth flanks. It frequently affects systems running under boundary or mixed lubrication, such as wind turbine gearboxes. Once micro-pitting begins, it rapidly damages gear profiles, leading to higher vibrations, mechanical wear, and gear failure. Using a lubricant with high micro-pitting resistance (tested under FVA 54/I-IV micropitting test standards) prevents premature component failure, keeping maintenance costs low.
Our precision quality control lab validates multiple parameters before releasing products for shipping: kinematic viscosity (at 40°C and 100°C to confirm the Viscosity Index), pour point, flash point (open cup method), foam characteristics, copper corrosion limits, and moisture content. This strict process ensures our gear oils and engine oils meet the requirements of international API and DIN standards.
Stored in original sealed drums in dry, temperature-controlled indoor warehouses, mineral-based gear oils have an estimated shelf life of up to 5 years. Synthetic gear oils (such as those formulated with PAO base stocks) can last up to 5 years without showing significant chemical degradation. Once opened or exposed to ambient moisture, lubricants should be monitored regularly to prevent water condensation and oxidation.
We offer comprehensive OEM/ODM customization services. We support buyers throughout the process, from tailoring target viscosity grades to custom packaging design. Our industrial plant is located close to Qingdao Port, allowing us to manage ocean shipping logistics, custom container packaging, and document verification quickly and efficiently.
Complete your procurement requirements with our extensive selection of engine, gear, compressor, and transmission fluids.
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