Industrial Closed Gear Oil 680#
High-viscosity industrial closed gear oil designed for extreme-load enclosed gearboxes, slow-speed heavy-duty transmission systems, and severe industrial working conditions.
Product Highlights
Built for Extreme Load and Slow-Speed Gear Protection
Industrial Closed Gear Oil 680# is selected when a gearbox requires thicker lubricating film, stronger pressure resistance, and dependable protection under heavy-load operation. It is especially suitable for large enclosed gearboxes where lower-viscosity oils may not provide enough film strength.
Product Introduction
High-Viscosity Gear Oil for Severe Industrial Gearbox Applications
Industrial Closed Gear Oil 680# is a heavy-duty enclosed gear oil formulated for industrial gearboxes operating under severe mechanical stress. It is designed for large gear units, slow-speed transmission systems, high-load machinery, and equipment that requires a strong and stable lubricating film.
The 680# grade offers higher viscosity than 320# and 460# grades. This makes it suitable for gear systems where stronger film thickness is needed to separate metal surfaces, reduce friction, control wear, and protect gears from pressure-related surface damage.
It is a practical solution for cement plants, mining equipment, steel mills, heavy-duty conveyors, quarry machinery, paper mills, sugar mills, and large industrial power transmission systems.
Product Description
Industrial Closed Gear Oil 680# is developed for enclosed gearboxes that work under extreme load, low speed, high torque, vibration, and continuous industrial operation. Its high-viscosity structure helps maintain strong oil-film protection between gear teeth, bearings, shafts, and internal transmission components.
In heavy-duty machinery, gear surfaces face high contact pressure. If the oil film becomes too thin, metal-to-metal contact may increase wear, noise, heat, and gearbox damage. Industrial Closed Gear Oil 680# helps reduce this risk by providing thicker lubricant film and strong load-carrying support.
The product is suitable for users who need reliable enclosed gearbox lubrication, anti-wear protection, rust resistance, corrosion protection, oxidation stability, foam control, and long-service performance under demanding working conditions.
Why Choose 680# Grade?
Lower Grades: 320# / 460#
- Suitable for moderate-to-heavy enclosed gearboxes
- Better for systems requiring easier flow and lower viscous drag
- Useful where speed is higher and load is less severe
- Commonly used in general industrial gearbox applications
Heavy Grade: 680#
- Designed for extreme-load and slow-speed enclosed gearboxes
- Provides stronger film thickness under high pressure
- Recommended when increased protection is needed
- Better suited for large gearboxes and severe industrial operations
Main Performance Features
High-Viscosity Film Strength
Provides a thicker lubricating film for heavy-duty gearboxes, helping separate gear surfaces under high load and slow-speed operation.
Extreme-Pressure Protection
Supports gear protection under high contact pressure, shock loading, and heavy torque transmission in demanding industrial systems.
Anti-Wear Gear Protection
Helps reduce wear on gear teeth, bearings, shafts, and internal gearbox parts by limiting direct metal-to-metal contact.
Scuffing Resistance
Helps protect gear tooth surfaces from pressure-related damage, especially in enclosed gearboxes working under severe load.
Oxidation Stability
Helps resist oil degradation during long service periods, supporting cleaner gearbox operation and more stable lubrication performance.
Rust and Corrosion Protection
Helps protect internal metal surfaces from moisture, corrosion, and environmental contamination in harsh industrial conditions.
Test Report Analysis and Product Specialty
What the Test Report Should Prove
For Industrial Closed Gear Oil 680#, the test report should not only show basic oil quality. It should prove that the product is suitable for extreme-load enclosed gearbox applications. The most important points are viscosity stability, load-carrying capacity, anti-wear protection, oxidation resistance, corrosion protection, foam control, and water separation performance.
A strong test report helps customers understand why 680# is selected for slow-speed, high-load, and severe industrial machinery instead of lighter gear-oil grades.
| Test Item | Technical Meaning | Customer Benefit |
|---|---|---|
| Kinematic Viscosity at 40°C | Confirms whether the oil matches the ISO VG 680 viscosity grade. | Ensures strong film thickness for heavy-load and slow-speed gear protection. |
| Kinematic Viscosity at 100°C | Shows how the oil behaves at higher operating temperatures. | Supports stable lubrication when the gearbox becomes hot during operation. |
| Viscosity Index | Indicates viscosity stability across temperature changes. | Helps maintain reliable oil-film protection in variable working conditions. | Copper Strip Corrosion | Evaluates corrosion tendency toward yellow metals. | Helps protect copper, bronze, and brass parts inside compatible systems. |
Professional Interpretation
If the test report confirms correct 680 viscosity grade, strong thermal stability, good anti-corrosion performance, low foaming tendency, and reliable load-carrying behavior, the product can be confidently positioned as a heavy-duty enclosed gearbox lubricant for severe industrial service.
Recommended Application Areas
Large Industrial Gearboxes
Suitable for enclosed gearboxes requiring high-viscosity lubrication under extreme load and slow-speed operating conditions.
Cement Plants
Recommended for selected gearbox systems used in crushing, grinding, conveying, and heavy material handling operations.
Mining and Quarry Equipment
Supports enclosed gearboxes exposed to high load, vibration, dust, and harsh working environments.
Steel and Rolling Mills
Helps protect heavy-duty transmission systems exposed to pressure, heat, impact, and continuous production duty.
Sugar Mills
Suitable for slow-speed, heavy-load gear systems used in crushing and processing machinery.
Heavy-Duty Conveyors
Provides strong lubrication support for conveyor drive systems operating under continuous load.
Paper and Pulp Plants
Helps support continuous production gearboxes where stable lubrication and equipment reliability are required.
Power Transmission Systems
Suitable for selected enclosed power transmission equipment requiring strong film protection and heavy-load performance.
Suitable Gear Systems
- Large enclosed industrial gearboxes
- Slow-speed gear transmission systems
- Heavy-load reduction gearboxes
- Spur gear systems
- Helical gear systems
- Bevel gear systems
- Worm gear systems where compatible
- Circulation-lubricated gear units
- Splash-lubricated enclosed gearboxes
- Selected heavy-load bearing systems requiring EP gear oil
General Product Information
| Item | Information |
|---|---|
| Product Name | Industrial Closed Gear Oil 680# |
| Product Category | Industrial Closed Gear Oil |
| Grade | 680# / ISO VG 680 grade |
| Product Type | Heavy-duty enclosed gearbox lubricant |
| Main Function | Extreme-pressure lubrication, heavy-load protection, anti-wear performance, rust protection, and gearbox reliability support |
| Recommended Use | Extreme-load, slow-speed, enclosed industrial gearboxes |
| Application Areas | Cement plants, mining equipment, steel mills, sugar mills, conveyors, paper mills, power transmission systems, and factory maintenance |
| Packaging | 16L Bucket / 200L Drum |
| Supply Service | Bulk supply, distributor supply, OEM support, and private label service |
Final product selection should be confirmed according to the official technical data sheet, test report, equipment manual, operating temperature, gearbox load, speed, seal compatibility, contamination level, and oil-change interval.
Packaging and Supply Options
16L Bucket
Suitable for workshops, maintenance teams, factories, and users who need convenient handling for regular gearbox oil replacement.
200L Drum
Suitable for industrial plants, lubricant distributors, importers, and customers with regular large-volume lubrication requirements.
OEM and Private Label
Shengxiang supports customized packaging, private label cooperation, distributor supply, and bulk industrial lubricant orders.
Storage and Handling Recommendations
Because 680# gear oil is a high-viscosity lubricant, clean storage and proper handling are important. Store the product in a clean, dry, and ventilated area. Keep containers sealed when not in use to prevent contamination from water, dust, sand, and foreign particles.
Use clean transfer pumps, hoses, funnels, and dispensing tools. For large gearboxes, dedicated high-viscosity transfer equipment is recommended. Do not mix with unknown oils or incompatible lubricants without technical confirmation.
Request Price, Test Report, TDS, Sample, or Bulk Supply Quotation
Contact Shengxiang sales team for Industrial Closed Gear Oil 680# price, technical data sheet, test report, packaging information, OEM cooperation, distributor inquiry, and bulk order support.
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