VG Heavy Load Closed Gear Oil is a high-performance lubricant engineered for tough industrial closed gear systems, ideal for mining, metallurgy, cement and construction equipment under high load, high temperature and shock load conditions.

Available in ISO VG grades 100,150,220,320 and 460, it perfectly matches various gearbox types, forming a durable oil film to protect gear teeth from wear, scuffing and pitting, and extending the overall service life of your equipment with stable performance in extreme working environments.

Key Features

• Superb Load-Bearing Capacity: Passes FZG test grade 12+, resists heavy and shock loads, avoids tooth surface damage and reduces running noise.
• Wide Temperature Adaptability: Works stably from -20℃ to 120℃, with good low-temperature fluidity for easy startup and high-temperature oxidation resistance to prevent oil deterioration.
• Excellent Water & Contamination Resistance: Fast water separation, no emulsion formation, and effective rust and corrosion protection for steel and copper components.
• Long Service Life: Good thermal stability, reduces sludge and varnish build-up, cuts oil change frequency and lowers maintenance costs.
• Perfect Compatibility: Matches common seal materials and mineral oil-based lubricants, no leakage or system damage during use.

Technical Parameters

Item	Quality Index (VG 320 as example)	Test Method
Viscosity Grade	VG150, VG220, VG320, VG460	(GB/T3141)
Kinematic Viscosity (40℃), m²/s	288~352(varies by grade)	GB/T 265
Pour Point (max), ℃	-10	GB/T 3535
Flash Point (Open Cup, min), ℃	200	GB/T 3536
Extreme Pressure Performance (Timken OK Load), kg (min)	60	GB/T 11144
Oxidation Stability (100℃, 1000h), Sludge, mg/100mL (max)	1.5	SH/T 0193
Corrosion Test (Copper Strip, 100℃, 3h), Grade (max)	1	GB/T 5096

Customer Reviews

"We use it for our mining crushers, and it's been 8 months without oil change-gearboxes run smoother and noise is way lower than before." - Mining Equipment Manager, Australia"Great performance in our cement plant's high-temperature gear systems, no corrosion or wear issues even in humid conditions." - Maintenance Supervisor, Germany"Perfect viscosity for our metallurgy gearboxes, reduces downtime and saves a lot on maintenance costs." - Plant Engineer, USA

Our Services

• Free professional grade selection consultation for your equipment
• Provide full technical documents including TDS and MSDS
• Flexible packaging: 1L,10L,18L,200L
• Customized delivery solutions for global shipping
• After-sales technical support and oil maintenance guidance

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