Mobiltac™ 375 NC — Heavy-Duty Open Gear Lubricant

Mobiltac™ 375 NC — Heavy-Duty Open Gear Lubricant for Marine & Mining

Mobiltac 375 NC is ExxonMobil's extra high performance, non-leaded, diluent-type open gear lubricant — engineered for the most demanding marine deck machinery, offshore equipment and high-temperature mining open gear applications. Available through Orbit Industrial as a Genuine Mobil Lubricants Distributor.

The non-chlorinated volatile solvent carrier ensures fluidity during application even at low temperatures. Once applied, the diluent evaporates and the lubricant forms a flexible, adhesive, high-strength film that adheres strongly to gear teeth and machine elements — resisting throw-off and providing continuous boundary lubrication throughout the service life of the equipment.

Why Mobiltac NC Over Older Open Gear Technologies

Mobiltac NC represents a significant advance over earlier diluent-type open gear lubricants — providing improved environmental performance (non-leaded, non-chlorinated) alongside better protection under boundary lubrication conditions, better water washing resistance and easier cold-temperature application. It will not harden, chip or flake in cold weather, is self-healing and does not form hard-packed buildup in gear-tooth roots.

Features & Benefits

Feature	Advantage & Benefit
Excellent protection under boundary lubrication conditions	Less equipment wear and breakdown — lower replacement, downtime and maintenance costs
Excellent low-temperature pumpability	Easy start-up at low ambient temperatures — avoids cost of preheating
Excellent resistance to water washing	Maintains superb protection in wet marine environments — less unanticipated downtime
Minimal throw-off and dripping	Less product waste — lower ongoing lubricant cost
No chipping or flaking at low temperatures	Maintains protective lubricating film throughout cold-weather operations
Easy clean-up with conventional solvents	Improved safety and reduced maintenance costs during servicing

Product Data Sheet

Recommended Applications — Mobiltac 375 NC

Mobiltac 375 NC, containing a high-viscosity base oil (KV 5,000 cSt @ 40°C diluted), is recommended for the lubrication of highly loaded open gears operating at elevated temperatures — including ring gears on cement kilns, large gears on ore-processing mills, and marine deck machinery under heavy continuous load. Minimum operating temperature: -1°C. Maximum operating temperature: 121°C.

Marine & Offshore Applications

• Marine deck crane open gear systems
• Anchor handling and mooring winch gearing
• Offshore platform deck machinery — highly loaded ring and pinion gears
• Vessel cargo crane open gear systems
• FPSO and offshore support vessel deck equipment
• Marine propulsion auxiliary open gear drives

Mining & Industrial Applications

• Cement kiln ring gears — high temperature, heavy load
• Ore processing mill gears
• Mine and quarry draglines and shovels
• Racks and pinions, swing gears, booms and sticks
• Open gear drives in mining and mineral processing operations

Typical Properties — Mobiltac 375 NC

Property	Mobiltac 375 NC
Appearance	Viscous, semi-fluid, black
Kinematic Viscosity @ 40°C diluted (cSt, ASTM D445)	5,000
Kinematic Viscosity @ 100°C undiluted (cSt, ASTM D445)	1,260
Flash Point °C (ASTM D92)	135
Specific Gravity kg/l @ 15.6°C (ASTM D1298)	0.96
Minimum Operating Temperature	-1°C
Maximum Operating Temperature	121°C

Typical properties are representative of those obtained with normal production tolerance and do not constitute a specification.

Supplied by Orbit Industrial — Genuine Mobil Lubricants Distributor

Orbit Industrial Supplies is a Genuine Mobil Lubricants Distributor supplying Mobil lubricants to mining, marine, fleet and industrial operations across South Africa. To request a quote for this product, use the Request a Quote form below.

View our full offshore and marine lubricant range.