Mobiltac™ 375 NC — Heavy-Duty Open Gear Lubricant
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 an authorised Mobil 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 — Authorised Mobil Distributor
Orbit Industrial Supplies is an authorised Mobil distributor supplying the full Mobiltac NC series to marine, offshore and mining operations across South Africa. For bulk pricing, technical consultation or port staging for vessel uplift through Cape Town, Saldanha Bay, Durban or Port Elizabeth — contact our team directly.
Tel: +27 (21) 569-2530 | jaco@orbitindustrial.co.za
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