Mobil SHC Gear Series

Gear Oils

Mobil SHC™ Gear Series is a line of exceptional performance, synthetic industrial gear oils designed to provide outstanding protection of gears and bearings, extended oil life even under extreme conditions, helping to enable problem-free operation of equipment and increased customer productivity. These scientifically engineered synthetic lubricants are formulated from synthetic base fluids that have exceptional oxidation and thermal properties and excellent low temperature fluidity. The high viscosity index of these oils deliver less change in viscosity with changes in temperature, enabling wider operating temperature range and improved low temperature startup. Mobil SHC Gear Series lubricants contain an advanced proprietary additive system designed to provide excellent protection against conventional wear modes such as scuffing as well as a high level of resistance against micropitting fatigue. In addition, compared to conventional gear oil chemistries, it offers the potential for improved lubrication of gearbox rolling element bearings. Mobil SHC Gear Series products offer outstanding rust and corrosion protection relative to conventional gear oils, even in the presence of seawater contamination. They show no tendency to plug fine filters even when wet and have excellent compatibility with ferrous and non-ferrous metals even at elevated temperatures. Mobil SHC Gear Series also exhibit outstanding compatibility with elastomers in static seal tests. They have outstanding EP properties that provide protection even under shock load conditions. The synthetic base stocks used in Mobil SHC Gear Series oils have inherently low traction properties that result in low fluid friction in the load zone of non-conforming surfaces such as gears and rolling element bearings. Reduced fluid friction produces lower operating temperatures and can help improve gear efficiency.

Mobil SHC Gear lubricants are recommended for enclosed industrial gear drives including steel-on-steel spur, helical, and bevel gears. They are especially recommended for applications that may be subject to micropitting: especially heavily loaded gearboxes with surface-hardened tooth metallurgies. It may also be used in gear applications where extreme low and/or high temperatures are encountered and applications where corrosion may be severe.


Features and Benefits

Mobil SHC Gear Series lubricants are part of the Mobil SHC line of products that are recognized and appreciated around the world for innovation and outstanding performance. These synthetic products, pioneered by our research scientists, symbolize the continuing commitment to using advanced technology to provide lubricants with excellent balanced performance. A key factor in the development of Mobil SHC Gear Series was the close contacts between our scientists and application specialists with key OEMs to ensure that our product offering would provide exceptional performance with rapidly evolving industrial gear designs and operation. Not least among the benefits shown in work with OEMs is the ability to resist micropitting wear which can occur with some highly loaded, case-hardened gearing applications. This cooperative work also demonstrated the all-round balanced performance benefits for the new Mobil SHC Gear technology, including a wide temperature range of application.

To address the issue of micropitting wear, our product formulation scientists designed a proprietary combination of additives which would resist traditional gear wear mechanisms as well as protecting against micropitting. Mobil SHC Gear products provide exceptional oil life and deposit control and resistance to thermal/oxidative and chemical degradation, as well as the balance of the performance features. The patent-pending combination of synthetic base oils also provides exceptional low temperature fluidity characteristics unmatched by conventional mineral oil gear lubricants and is a key benefit for remote, low ambient temperature applications. The Mobil SHC Gear Series lubricants offer the following potential benefits:

Features Advantages and Potential Benefits
Superb protection from micropitting fatigue wear as well as high resistance to traditional scuffing wear Helps extend gear and bearing life in enclosed gear drives operating under extreme conditions of load, speed and temperature
Helps reduce unplanned downtime; less maintenance - especially critical for difficult to access gearboxes.
Excellent resistance to degradation at high temperatures Helps extend oil life and drain intervals and reduce oil consumption, which can lower maintenance costs
Low traction Helps reduce energy consumption and lower operating temperatures
High viscosity index equating to reduced viscosity change with temperature Ability to operate at both high and low temperatures: especially critical in remote applications with no oil cooling or heating
Excellent resistance to rust and corrosion and very good demulsibility Helps to ensure smooth, trouble-free operation at high temperatures or in applications subject to water contamination
Excellent compatibility with a variety of soft metals
Excellent shear stability Helps extend gear and bearing life
Resistence to filter plugging, even in the presence of water Fewer filter changes; which can help reduce maintenance costs
Excellent seal compatibility Less contamination and lower potential for oil leakage
Excellent compatibility with common gearbox materials and with mineral-based gear oils Easy changeover from many mineral products



Application Considerations: While the Mobil SHC Gear Series are compatible with mineral oil based products, admixture may detract from their performance. Consequently it is recommended that before changing a system to one of the Mobil SHC Gear Series, it should be thoroughly cleaned out and flushed to achieve the maximum performance benefits.
Mobil SHC Gear Series exceptional performance, synthetic industrial gear oils are designed to provide optimum equipment protection and oil life even under extreme conditions. They are especially formulated to resist micropitting of modern, case hardened gearing and can operate in both high and low temperature environments. Typical applications include:

  • Modern, highly loaded gearboxes used in the paper, steel, oil, textile, lumber and cement industries where gear protection and optimum oil life are required.
  • Plastic extruder gearboxes

Mobil SHC Gear Series ISO VG 150, 220, 320, 460 and 680 are approved under General Electric’s (GE) gear oil specification D50E35 for use in off-highway vehicle motorized wheel gearbox applications.


Specifications and Approvals

Mobil SHC Gear meets or exceeds the following industry specifications 150 220 320 460 680 1000
Meets AGMA 9005-E02 X X X X X
Meets DIN 51517 Part 3 (CLP) X X X X X X
Meets ISO 12925-1 Type CKD X X X X X  
Meets ISO 12925-1 Type CKT X X        


Mobil SHC Gear has the following builder approvals 150 220 320 460 680 1000
SIEMENS AG Flender gear units, T 7300, Table A-c, Flender Code No. A36 A35 A34 A33 A32 A31
SEW Eurodrive
150 220 320 460 680 1000
GE Motorized Wheel D50E35 D50E35 D50E35 D50E35 D50E35 D50E35


Typical Properties

Mobil SHC Gear Series 150 220 320 460 680 1000
ISO Viscosity Grade 150 220 320 460 680 1000
Viscosity, ASTM D 445            
cSt @ 40ºC 150 220 320 460 680 1000
cSt @ 100ºC 22.2 30.4 40.6 54.1 75.5 99.4
Viscosity Index, ASTM D 2270 176 180 181 184 192 192
Pour Point, ºC, ASTM D 97 -45 -39 -33 -27 -27 -24
Flash Point, ºC, ASTM D 92 233 233 233 234 234 234
Brookfield @ 0ºF (-18ºC), cP, ASTM D 2983         41000 96000
Brookfield @ -20ºF (-28ºC), cP, ASTM D 2983 18200 35000 57000 107000 156000 500000
Density 60ºF (15,6ºC), g/ml 0.86 0.86 0.86 0.86 0.86 0.87
Total Acid Number, mg KOH/g, ASTM D 664 0.9 0.9 0.9 0.9 0.9 0.9
4 Ball EP Test, kgf, ASTM D 2783            
Weld Load 200 200 200 200 200 200
Load Wear Index 51 51 51 51 51 51
FZG Micropitting, FVA Proc No. 54, 90°C            
Fail Stage 10 10 10 10 10 10
GFT-Class High High High High High High
FZG Scuffing, ISO 14635-1 (mod) A/8.3/90, Fail Stage 13 14 14 14 14 14
FZG Scuffing, ISO 14635-1 (mod) A/16.6/90, Fail Stage Not tested >14 >14 >14 >14 >14
Copper Corrosion, 3H @ 121°C, ASTM D 130 1B 1B 1B 1B 1B 1B
Rust protection, ASTM D665, Sea Water Pass Pass Pass Pass Pass Pass
Demulsibility of EP Oils, Free Water, ml, ASTM D 2711 88 87 85 84 87  
Water Separability, ASTM D 1401,Time to 40/37/3 at 82ºC, minutes 10 10 10 15 25 40
Foaming Characteristics, ASTM D 892,Seq. II, Tendency/Stability, ml/ml 0/0 0/0 0/0 20/0 0/0 0/0


Health and Safety

Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet (MSDS) are followed. MSDS's are available upon request through your sales contract office, or via the Internet. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.