Explore our specialized range of high-efficiency industrial lubricants, diesel and gasoline engine oils engineered for extreme operational environments.
Established in 2009 and headquartered in Zibo, Shandong, China, Shandong Longhai Lubrication Technology Development Co., Ltd. is a state-level high-tech enterprise dedicated to the R&D, processing, manufacturing, and global sales of advanced lubricant systems. For over 15 years, we have built a fully integrated upstream-to-downstream industrial lubrication ecosystem, positioning ourselves as a trusted strategic partner for heavy-industrial operators and transport fleets worldwide.
Our proprietary brand, "Century Longhai," along with our international strategically partnered British "A Ba" series, represents the pinnacle of high-load industrial tribological science. Our product lines encompass heavy-duty diesel engine oils, high-performance gasoline engine oils, industrial gear oils, hydraulic transmission fluids, turbine oils, and specialized open gear lubricants, all backed by quality insurance from PICC China People's Insurance Company.
An in-depth look at tribology, film strength, and boundary lubrication under extreme loads.
Large open gear drives used in rotary cement kilns, ball mills, SAG mills, and heavy excavation shovels operate under the most severe mechanical conditions. These systems do not benefit from full hydrodynamic lubrication; instead, they function in the boundary and mixed lubrication regimes. This requires open gear lubricants (OGLs) to possess extreme pressure (EP) properties, high base oil viscosity, and exceptional adhesive strength.
Our open gear lubricants utilize synthetic polymer bases coupled with solid lubricant suspensions, such as fine-grade colloidal graphite and molybdenum disulfide (MoS2). This combination forms a robust, cushioning tribochemical film on the gear tooth flanks, neutralizing metal-to-metal contact even when subjected to shock loads and high torsional vibration. Excellent sprayability ensures precise coverage via automatic spray systems (like Lincoln or Farval setups) without clogging nozzles or causing runoff.
Furthermore, our modern formulations are 100% free of chlorinated solvents and heavy metals like lead, eliminating health risks for maintenance personnel and meeting strict environmental requirements without sacrificing the high viscosity necessary for high-load profiles.
Unmatched manufacturing scale, strategic petrochemical cluster access, and high-precision automation.
Situated in Zibo, Shandong—a major hub for China's petrochemical sector—we have direct pipelines and stable access to premium base oils (Groups I, II, III, and synthetic PAO) and specialized additive packages. This geographical position minimizes internal freight costs and guarantees consistent chemical inputs.
Our production plant features fully automated, PLC-controlled batching and blending kettles. The filling lines utilize volumetric metering principles, guaranteeing an accuracy of 1‰ to 2‰. Our automated packaging solutions increase filling throughput by 20% to 35%, ensuring rapid fulfillment of high-volume wholesale orders.
We manage bespoke chemical formulations for global brands. From adjusting viscosity indexes for sub-zero Arctic operations to tailoring high-temperature asphaltic-free gear greases, our 131-acre manufacturing footprint supports both flexible small-batch trials and large-scale bulk chemical exports.
Operating heavy industrial equipment internationally requires strict adherence to environmental regulations and local industrial safety codes. Shandong Longhai provides complete safety and regulatory compliance portfolios, ensuring smooth customs processing and hassle-free operation on site.
All open gear lubricants are manufactured in strict compliance with ISO 9001:2015 Quality Management, ISO 14001:2015 Environmental Management, and ISO 45001:2018 Occupational Health and Safety standards. We provide globally compliant GHS Safety Data Sheets (SDS), REACH registration documentation for EU importers, and certifications of conformity matching national regulations worldwide.
Our localized support service includes field audits, lubricant compatibility analyses, used oil analysis (UOA) programs, and remote technical support to assist site engineers with spray system calibration and gear wear profiling.
Our commitment to quality is validated by international standards bodies and heavy machinery manufacturers.
How we address procurement priorities and deliver reliable protection across various operating sites.
Cement rotary kilns operate at high temperatures, exposing girth gears to radiant heat and potential misalignment. Our lubricants maintain their viscosity at high temperatures, resisting thermal degradation, preventing leakage, and protecting against abrasive dust ingress.
Mining mills require continuous operation under severe shock loads. Our graphite-infused open gear grease cushions the gear mesh, dampening shock vibrations, preventing micro-pitting, and extending the operational life of the gear set.
Exposure to saltwater, moisture, and variable load conditions requires open gear lubricants with high wash-off resistance and corrosion protection. Our formulations create a water-resistant film that protects components in maritime settings.
Global procurement teams prioritize security of supply, cost performance, and technical compliance. We address these needs through:
Navigating the transition toward biodegradable chemistries and smart lubrication management.
Historically, open gear lubricants relied on volatile organic compounds (VOCs) to act as diluents for spraying application. Modern industry regulations are phasing out these components due to health and environmental risks. The industry is moving toward solvent-free high-viscosity synthetic esters and heavy polymers that remain fluid enough for spray application while offering higher flash points and reduced environmental impact.
Inside our precision laboratories and joint innovation facilities.
A closer look at our blending systems, storage facilities, and testing lines.
Our products comply with relevant standards for international commercial distribution.
Custom industrial formulations tailored to specific machinery, climates, and market requirements.
We provide contract manufacturing services for industrial lubricants. Our facilities handle customization across the following dimensions:
A structured approach ensuring quality control, technical compliance, and reliable supply.
Reviewing equipment parameters, environment, loads, and local compliance requirements.
Developing base chemistry and selecting additives to meet target specifications.
Conducting ASTM laboratory testing for wear, copper corrosion, viscosity index, and sprayability.
Processing batch blending in our automated facility, backed by ISO-certified quality control.
Providing used oil analysis, technical advice, and spray system alignment support.
Images showcasing our industrial applications, packaging facilities, and material storage.
In addition to heavy open gear solutions, we offer full-spectrum engine, hydraulic, and gear protection systems.
Technical answers to common questions about selection, application, and maintenance.
A: Grease-based open gear lubricants utilize a thickener (such as aluminum complex or lithium complex) to hold the base oil and solid lubricants in a semi-solid matrix. They are ideal for systems requiring high adhesion and cushion under shock loads. Fluid-based open gear lubricants (often synthetic high-viscosity oils without a thickener) rely on high base oil viscosity to provide protection. These fluids flow more easily off gear flanks, assisting with contaminants removal and simplifying cleanup.
A: Open gears frequently operate under boundary lubrication where the liquid lubricant film can become thin. Under these conditions, solid lubricants like graphite and MoS2 form a physical barrier on the gear tooth surface. They slide over one another under load, preventing direct metal-to-metal contact, reducing friction coefficients, and protecting against scuffing or welding during shock load events.
A: Nozzle clogging is typically caused by lubricant separation, contamination, or excessive viscosity at low temperatures. Selecting a sprayable open gear lubricant with good pumpability at lower temperatures helps prevent clogging. Regular maintenance checks, including checking spray patterns and cleaning system filters, are also recommended.
A: Yes. While older solvent-cutback formulations used volatile solvents to temporarily reduce viscosity for spraying, modern solvent-free lubricants utilize specialized high-viscosity base fluids and synthetic polymers. These provide comparable sprayability and immediate film thickness without the VOC emissions, lower flash points, or shrinkage associated with solvent evaporation.
A: Analyzing used lubricant samples from the gear tooth flanks can reveal wear debris, contamination levels (such as sand or process dust), and changes in the lubricant's physical state. Regular analysis helps identify abnormal wear early, allowing maintenance teams to adjust spray cycles or address gear alignment issues before serious damage occurs.
A: Mixing different lubricants is generally not recommended, as differing thickener types or additive packages can react, leading to softening, hardening, or loss of adhesion. If changing to a new lubricant, we recommend thoroughly cleaning the gear flanks and spray system before application.
Get in touch with our application engineers for custom formulations, wholesale pricing, and technical advice.
At Shandong Longhai Lubrication Technology Development Co., Ltd., we follow the management principle: "planning big strategies, focusing on technology, creating high quality, and keeping reputation." We operate with a customer-centric focus, providing technical support alongside reliable chemical supplies. In the future, we will continue using technological innovation as an engine and sustainable development as a cornerstone, working with global partners to lubricate the future together!
Headquarters: Zibo City, Shandong Province, China.
Production Capacity: 200,000 Tons / Year | Factory Area: 131 Acres.
Longhai