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Gear Oils

Product Description

Mobil SHC Gear 22M and 46M are supreme performance ultra high viscosity synthetic lubricants designed specifically for use in heavily loaded, low speed open gears where boundary lubrication conditions often prevail. They are formulated from synthetic base stocks, which have remarkable low-temperature fluidity, even at such high viscosity grades. These ultra high viscosity products can be pumped over relatively long distances and use standard spray application equipment. The combination of a naturally high viscosity index and a unique additive system gives the products exceptional thermal/oxidative properties and provides outstanding performance under severe high and low temperature operating conditions even with very slow moving gears. The additive formulation also provides excellent gear scuffing protection, anti-wear performance and rust and corrosion inhibition. 

Mobil SHC Gear 22M and 46M exceed Falk Corporation's minimum viscosity requirements for intermittent lubrication of gears - winter and summer grades, respectively. These grades also meet the viscosity requirements for AGMA lubricant numbers 14R and 15R, respectively, although they are not residual lubricants, but are leading edge synthetic products. Mobil SHC Gear 22M and 46M do not contain any solvent or any asphaltic-type base oil. 


Features and Benefits

Mobil SHC Gear 22M and 46M lubricants are leading members of the Mobil SHC brand of products that are world-renowned for their innovation and performance. These scientifically engineered synthetic lubricants symbolize the continuing commitment to using advanced technology to provide outstanding lubricant products. Mobil SHC Gear 22M and 46M provide benefits not possible with mineral stocks, particularly under extreme high and low temperature operating conditions, and deliver performance features and customer benefits. 

Our formulation scientists have used innovative combinations of base oils plus a proprietary additive combination that fortifies the base oils to provide excellent gear scuffing protection and anti-wear performance, even in shock load situations. The resulting finished products have shown exceptional performance in OEM evaluations, customer field tests and commercial use. These ultra high viscosity products are particularly effective in low-speed, high load, high temperature situations and provide excellent gear and bearing protection, longer oil life and excellent all-round service compared with conventional products. 

Specific features and potential benefits for the Mobil SHC Gear 22M and 46M lubricants include: 

FeaturesAdvantages and Potential Benefits
Thick EHL fluid film formation and selected additives provide outstanding load-carrying, antiwear and tackiness properties Helps extend gear life, less downtime and reduce maintenance and replacement cost
Avoids potential for solvent retention and reduced viscosity with solvent-type products
Provides much thicker EHL film compared with semi-fluid grease products
Excellent pumpability at ambient temperatures Helps reduce in pump replacement costs
Uses existing lubricant spray equipment Low-cost conversion from asphaltic of semi-fluid grease products
Lower application rates than greases, less waste compared with asphalt/solvent products Helps reduce lubricant consumption and disposal costs
Does not contain solids or asphaltic resins Absence of hard-packed gear root deposits results in reduction in downtime and maintenance costs
Light colored product Helps avoid need for costly gear cleaning prior to inspection
Solvent-free Helps avoid potential safety issues related to volatile, low flash solvent



Application Considerations: Normally, conversion to Mobil SHC Gear 22M or 46M from asphaltic or grease products will be a simple process with no change in lubricant spray equipment. It is recommended that the gears be thoroughly cleaned to take advantage of the light color of these synthetic products. Consult your Mobil representative for further details on lubricant conversion. 

Mobil SHC Gear 22M and 46M are designed specifically for use in heavily loaded, low speed open gearing which drive stationary rotating machinery. Product is typically applied by intermittent by spray nozzle systems. Specific applications include:

  •  Kilns and mills in metal mining, cement and limestone production and in sugar plants
  • Slow speed, heavily loaded plain and rolling contact bearings


Typical Properties


Mobil SHC Gear Series22M46M
ISO Viscosity Grade    
Viscosity, ASTM D 445    
cSt @ 40º C 22,000 46,000
cSt @ 100º C 700 1375
Viscosity Index, ASTM D 2270 180 180
Pour Point, ºC, ASTM D 97 6 15
Flash Point, ºC, ASTM D 92 240 240
Specific Gravity @15.6º C kg/l, ASTM D 4052 0.89 0.924
Rust protection, ASTM D665, Sea Water Pass Pass
Copper Strip Corrosion, ASTM D 130,3 hrs @ 100º C 1B 1B



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.

Mobil, Mobil SHC, and the Pegasus design are trademarks of Exxon Mobil Corporation, or one of its subsidiaries.. 


Copyright © 2001-2015 Exxon Mobil Corporation. All rights reserved.


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