Product Line Catalog
Premium formulations engineered for high thermal stability, load capacity, and anti-wear protection across industrial systems.
Corporate Profile & Authority
Established in 2009 and headquartered in Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. is a premier high-tech enterprise integrating research & development, precision manufacturing, and international trade operations. With over 15 years of industry specialization, we have built a complete vertical industrial chain system, setting quality standards for global industrial lubrication and transportation applications.
We operate our celebrated flagship brand "Century Longhai" alongside the British strategic brand "A Ba" series. Covered by quality insurance from PICC (China People's Insurance Company), our products extend from high-grade motor oils to highly specialized industrial gear and hydraulic fluids. We serve heavy-industry sectors worldwide, ensuring equipment runs smoother, cooler, and with minimal operational wear.
White Paper Section I
Why extreme pressure mineral fluids remain the absolute foundation of heavy-duty transmission systems worldwide.
In modern industrial architecture, heavy Machinery operates under ever-increasing thermal and mechanical loads. While synthetic lubricants have captured niche applications, Mineral Gear Oils remain the primary choice for planetary gearboxes, heavy-duty industrial reducers, and construction equipment. This is attributed to their natural high film strength, excellent seal compatibility, cost-efficiency, and robust response to Extreme Pressure (EP) additive formulations.
Globally, manufacturers seek suppliers who can deliver consistent base oil quality and advanced additive chemistries. Formulations like L-CKC Medium Load and L-CKD Heavy Duty Industrial Gear Oil are crucial in prevents micropitting, scuffing, and fatigue-induced gear wear under volatile operating conditions. From cement kilns to maritime thrusters, the demand for mineral formulations remains highly critical.
"The choice of mineral gear oil dictates the operational life cycle of critical gear assets. Shandong Longhai's advanced base formulations integrate unique sulfur-phosphorus EP packages, keeping equipment functional in environments where ambient temperatures fluctuate drastically."
Manufacturing Excellence
Harnessing advanced automation, structural supply chain efficiency, and intelligent laboratory setups.
Our automated blending and filling lines utilize advanced mass-flow metering principles, maintaining an extreme tolerance limit of 1‰ to 2‰. This reduces material wastage and ensures exact package integrity across all shipments.
By integrating smart warehousing with fully automated logistics controls, Longhai has boosted overall filling speed by 20% to 35% over traditional compounding plants, ensuring your production timelines are strictly maintained.
Our operations comply strictly with international protocols. We are ISO-9001-2015, ISO 14001, and ISO 18001 certified, and our automotive automatic transmission fluids carry direct Mercedes-Benz approvals.
Our modern facility spans 131 acres, utilizing cutting-edge testing equipment within our Joint Innovation Center to verify viscosity indices, flash points, and shear rates before dispatch.
Visual Transparency
Take a look inside our enterprise environment, laboratories, and fully certified production plants.
Custom Formulation Development
From micro-trial blending to full-scale multi-spec packaging, we match global API and ACEA specifications.
We offer end-to-end customized lubrication solutions. Each product can be adjusted for kinematic viscosity indexes, low-temperature pour points, and load-carrying capacity values depending on customer requirements.
Transparent Partnership
From the initial consultation to global delivery and customer feedback systems, we guarantee complete supply chain visibility.
Demand Analysis
Formula Development
Sample Testing
Production Delivery
After-Sales Support
Quality Assurance
Approved and certified by major quality inspection frameworks and automotive regulators.
White Paper Section II
Deep optimization parameters tailored for heavy machinery, specialized transport vehicles, and regional climates.
In heavy industrial contexts like steel rolling mill gears, cement grinding mills, and mining conveyor systems, gear teeth are subjected to massive shock loads and boundary lubrication regimes. The L-CKD heavy-duty gear oils engineered by Shandong Longhai utilize high-stability mineral base stocks combined with synergistic sulfur-phosphorus additives. This reduces scuffing, prevents early pitting, and maintains the required load-carrying capacity (FZG A/8.3/90 failure load stage > 12).
Operating gearboxes in tropical environments or high-altitude mining basins requires gear oil with extreme shear stability. Our mineral formulations guarantee that viscosity fluctuations stay within tight tolerance limits under constant shear stresses. The pour point is optimized using advanced depressants, ensuring fluid flow even at lower operational startups, while protecting equipment against thermal oxidation at high temperatures.
Large-scale global procurement managers look at the Total Cost of Ownership (TCO) of lubricants. Longhai's specialized diesel engine oils (like CJ-4 and CI-4 Plus) and premium heavy-duty gear oils provide long-drain properties that minimize lubricant changes. The demulsibility properties of our mineral oils allow quick separation from water, protecting marine gear drives and high-humidity mining gearboxes from rust and internal acid corrosion.
Technical Support & Knowledge Base
Expert insights into selecting, handling, and formulating lubricants for maximum mechanical performance.
L-CKC and L-CKD are standard specifications for industrial gear oils operating under different loads. L-CKC is formulated for medium-load gear drives, whereas L-CKD is engineered for heavy-duty systems subjected to severe contact pressures, high shock loads, and high working temperatures. L-CKD features superior anti-wear (extreme pressure) chemistry, better thermal-oxidative stability, and enhanced micropitting resistance compared to L-CKC.
While synthetic gear oils perform excellently at extreme temperature limits, mineral gear oils provide highly cost-effective lubrication, excellent seal compatibility (reducing seal leakage), and high native oil-film thickness under normal operational temperature ranges (50°C to 80°C). Additionally, they respond extremely well to sulfur-phosphorus extreme pressure (EP) chemistry, making them the default, high-volume choice for heavy industrial gear drives.
Our fully automatic filling equipment operates with an accuracy margin of 1‰-2‰. This high level of volumetric control prevents baseline variability in additive packaging ratios, ensures seal integrity, avoids exposure to ambient contaminants during the packaging process, and protects the precise additive balance established in our laboratory.
Yes, Shandong Longhai offers comprehensive OEM/ODM blending services. We formulate fully synthetic, semi-synthetic, and premium mineral gear oils customized to specific climatic conditions, load factors, or viscosity classes (such as ISO VG 150, 220, 320, 460, or 680), conforming strictly to international API, ACEA, and industrial standards.
We have passed ISO-9001-2015 Quality System Certification, ISO 14001 Environmental Management System Certification, and ISO 18001 Health Management Certification. Furthermore, our automatic transmission products are officially Mercedes-Benz certified, guaranteeing excellent lubrication stability under extreme operational demands.
Demulsibility is the ability of gear oil to separate from water. Industrial gearboxes are frequently exposed to atmospheric humidity or cooling water. Our premium mineral formulations have excellent demulsibility characteristics, allowing water to separate rapidly and settle at the bottom of the sump for drainage, preserving the oil film and preventing metal-on-metal corrosion.
Verified Operations
Our test lab validation documents ensure batch consistency, chemical verification, and performance conformity.
Global Sourcing Hub
Our management policy is centered on "planning big strategies, focusing on technology, creating high quality, and maintaining reputation". As you source mineral gear oils, diesel lubricants, and industrial fluids for distribution or large-scale operations, partner with a verified manufacturer equipped with automated filling systems, custom R&D laboratories, and a global supply network.
Products are character, quality is life, customer first, honest and pragmatic service tenet. We work hand-in-hand with global buyers to deliver reliable lubricants that optimize equipment lifetimes and reduce operational maintenance overheads.
Demand Sourcing Catalog
Premium performance blends optimized for modern automotive and heavy industrial applications.
Product Line Catalog
Premium formulations engineered for high thermal stability, load capacity, and anti-wear protection across industrial systems.
Factory Lab Assets
Our facility environment and equipment verification imagery.
Longhai
