Explore our advanced engine, hydraulic, and industrial gear lubrication systems manufactured for extreme durability.
Worm gearboxes are widely recognized in mechanical engineering for their ability to deliver massive gear reductions and high torque multiplication in an incredibly compact footprint. However, from a lubrication standpoint, they present one of the most challenging operating environments. Unlike spur or helical gears which exhibit rolling contact, worm drives rely on severe sliding friction. The mesh action between the case-hardened steel worm screw and the softer phosphor-bronze worm gear wheel creates continuous sliding velocities. This action shears the oil film rapidly, leading to elevated temperatures, boundary lubrication regimes, and accelerated bronze wear if not addressed by high-quality lubricants.
To prevent severe wear, oxidation, and system failures, industrial operators require specialized worm gear lubes. These fluids must resist thermal breakdown, prevent micropitting on steel, and actively inhibit chemical corrosion of the yellow metals (bronze/copper) used in the gear wheel. Standard extreme pressure (EP) gear oils containing active sulfur-phosphorus chemistries will chemically attack bronze elements under high temperatures. Therefore, modern operations rely on specialized formulated polyalkylene glycol (PAG) synthetics, polyalphaolefin (PAO) synthetics, or carefully non-active compounded mineral gear oils to guarantee machinery uptime.
Established in 2009 and headquartered in Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. is a premier high-tech enterprise integrating R&D, precision production, and global export services. Spanning more than 15 years in the lubrication industry, we have engineered a complete industrial supply chain dedicated to delivering high-performance fluids for industrial machinery, commercial transport, and specialty applications.
Under our proprietary brand "Century Longhai" and our strategic international brand collaboration, British "A Ba" series, we offer an extensive portfolio. Our chemical formulations cover heavy-duty diesel oils, gasoline engine oils, high-viscosity gear oils, hydraulic transmission fluids, turbine protection lubes, and high-performance synthetic lubricants. To guarantee the absolute security of our partners, all products are insured globally by PICC (People's Insurance Company of China), establishing our brand as a beacon of reliability and quality assurance in the marketplace.
Our facility operation conforms to strict global manufacturing directives to deliver consistent batch quality and performance.
Ensuring standardized manufacturing routines, rigorous raw material selection, and final batch inspection procedures for complete quality stability.
Executing ecological manufacturing workflows, reducing emissions, and formulating environmentally compliant synthetic products.
Providing a safe industrial environment for our specialist workforce, translating to uninterrupted production cycles and dependable delivery.
Combining raw material accessibility, advanced automation technology, and massive production capacities to serve global markets.
Shandong Longhai Lubrication operates a sprawling manufacturing base covering over 131 acres. This modern industrial infrastructure houses highly automated oil blending and packaging lines with an annual capacity of 200,000 metric tons. Zibo is a central industrial and petrochemical hub in Shandong Province, which grants us raw material access to high-quality base oils (API Group I, II, III, IV/PAO) and premium additive packages. This geographical proximity to refinery logistics significantly reduces transportation overheads, allowing us to offer premium lubricants at competitive wholesale prices.
Our packaging lines employ fully automatic high-precision metering filling technology, achieving a filling accuracy rate of 1‰ to 2‰. While maintaining high dosing precision, these automated systems increase filling speeds by 20% to 35% over legacy setups. This speed enables us to execute large volume orders with prompt lead times. Our plant is also equipped with modern testing labs that analyze key parameters of every batch—including kinematic viscosity, viscosity index, flash point, pour point, copper strip corrosion (ASTM D130), and foaming characteristics.
A comprehensive engineering reference comparing Mineral (Compounded), PAO, and PAG chemical formulations.
| Lubricant Base Chemistry | Viscosity Range (ISO VG) | Operating Temp Range (°C) | Coefficient of Friction | Bronze Gear Protection | Average Service Life |
|---|---|---|---|---|---|
| Compounded Mineral Gear Oil (Non-Active EP / Fatty Additive) | 150, 220, 320, 460, 680 | -10°C to +80°C | Medium (0.06 - 0.08) | Excellent (Non-reactive) | 1,000 - 2,000 Operating Hours |
| Synthetic Polyalphaolefin (PAO) (Rust & Oxidation Inhibited) | 150, 220, 320, 460, 680 | -40°C to +120°C | Low (0.04 - 0.06) | Excellent | 4,000 - 6,000 Operating Hours |
| Synthetic Polyalkylene Glycol (PAG) (Superior Sliding Efficiency) | 150, 220, 320, 460, 680 | -35°C to +140°C | Ultra-Low (0.02 - 0.04) | Superior (Optimal heat dispersion) | 8,000 - 10,000 Operating Hours |
Selecting the appropriate formulation depends heavily on load conditions, input speeds, and ambient operating temperatures. PAG (Polyalkylene Glycol) base oils provide the lowest coefficient of friction under sliding contact, making them the standard choice for high-ratio, continuous-operation worm gear systems. The reduced friction directly translates to less mechanical power loss, lower operating temperatures, and increased gear efficiency. Note that PAG fluids are incompatible with mineral oils and PAO synthetics; thorough flushing of the gearbox is required when switching chemistries.
Where our high-performance industrial gear oils keep infrastructure and production lines running worldwide.
Heavy-duty worm gears operating under ambient radiative heat require high-viscosity PAG lubricants to prevent lubricant thinning, shear breakdown, and mechanical seizing.
Traction machinery needs smooth, quiet worm gear drives. High viscosity index synthetic lubricants lower operational noise and extend service intervals in vertical transport systems.
Logistics sorting hubs run worm-geared motors 24/7. Using synthetic PAG gear oils keeps operating temperatures low, reducing electrical energy draw.
Custom chemical formulations, customized viscosities, and comprehensive packaging services tailored to your market requirements.
Shandong Longhai Lubrication provides end-to-end OEM (Original Equipment Manufacturer) and ODM (Original Design Manufacturer) services for global lubricant distributors, industrial supply companies, and gear brand OEMs. Our chemistry team can formulate synthetic and mineral lubricants designed for specific thermal loads, environmental conditions, and mechanical load limits.
We accommodate a range of options, from small-scale testing batches to high-volume commercial production runs. Our filling systems support various packaging formats, including 1-liter canisters, 4-liter pails, 18-liter buckets, and 200-liter steel drums. Additionally, our design and label printing support helps global distributors establish localized brand identities with fully compliant product documentation (SDS, TDS).
An integrated development pipeline from initial project briefing to global logistics fulfillment.
Defining mechanical load parameters, target operating temperatures, and viscosity grades.
Formulating mineral, PAO, or PAG bases with customized additive packages in our lab.
Subjecting test batches to ASTM testing for shear stability, copper corrosion, and wear prevention.
Executing high-precision blending and filling with automatic lines for prompt order dispatch.
Providing ongoing laboratory testing, oil analysis services, and shipping coordination.
A look inside Shandong Longhai's production environment, joint innovation labs, and testing infrastructure.
Expert answers to common technical questions about selecting and managing lubricants in sliding-friction gear systems.
Browse our selection of heavy-duty synthetic diesel, gasoline engine, and anti-wear hydraulic oil formulations.
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