Product Description
Mobilmet Alpha, Mobilmet Sigma, Mobilmet Gamma, and Mobilmet Omega are high
performance mineral-oil-type active cutting oils incorporating synthesised
additive technology. The balanced selection of additives in each Mobilmet
cutting oil maximises performance over the wide range of pressures and
temperatures encountered when machining difficult metals under difficult
conditions. This chemically-synthesised, active additive combination also
controls buildup on the tool tip, resulting in a better surface finish.
These Mobilmet cutting oils contain the active anti-weld properties that are
required for cutting difficult-to-machine metals. They are transparent on the
work piece, allowing good visual inspection of machined parts. These oils,
however, can discolour the surface of copper alloys. Mobilmet Alpha, Sigma,
Gamma, and Omega are designed for a wide variety of metal cutting operations,
severities and metallurgies. They are also formulated for ease of use and
operator convenience. These attributes have resulted in these fluids becoming
the products of choice for many machine shops.
Mobilmet Alpha
cutting oil is the lowest-viscosity product in the series. It is recommended
for deep-hole or gun drilling where its low viscosity enables it to flush
swarf and chips away from the hole and permits fines to settle quickly.
Mobilmet Sigma cutting oil is a medium-viscosity oil that will provide
outstanding performance in general-purpose machine operations. It is
recommended for nearly all machining operations on ferrous metals, except
heavy-duty operations where tolerance and finish are critical, or for
operations such as deep-hole drilling where a low-viscosity oil is needed. It
is a transparent, low-odor cutting oil that gives outstanding results when
compared with other cutting oils in the same viscosity range. Its very high
anti-weld and lubricity compounding make it useful on tough, draggy metals. It
contains an anti-mist agent. Mobilmet Gamma is a cutting oil with high
anti-weld and lubricity compounding. It is recommended for more severe
operations, such as heavy-duty threading, tapping, and broaching on
difficult-to-machine metals. Where staining is not critical, it may be used on
brass, bronze, or other copper-bearing alloys. This anti-mist-type oil is a
transparent, low-odor product that provides outstanding performance compared
to other so-called heavy-duty cutting oils. Mobilmet Omega is an extremely
heavy-duty cutting oil for hard-to-machine metals that must be broached,
tapped, or threaded.
Features and Benefits
The Mobilmet brand of cutting fluids has gained a reputation for innovation
and outstanding performance over the years. Mobilmet Alpha, Sigma, Gamma, and
Omega are an important member of this family with their active additive and
low-misting technology. This proprietary formulation approach, developed by
our formulation scientists in conjunction with key customers, yields superb
performance in a wide range of applications.
Features and
potential benefits of Mobilmet Alpha, Sigma, Gamma, and Omega products include:
Features
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Advantages and Potential Benefits
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Very active anti-weld additive technology
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High cutting efficiency, better surface finish and closer tolerances for
overall improved productivity Helps increase tool life between regrinds
Reduced chip welding in heavy-duty operations Faster machining at
higher speeds and/or feeds
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Multi-purpose capability
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Fewer cutting oils in shop and potential for lower inventory costs
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Less misting (Mobilmet Sigma, Gamma)
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Improved workplace and operator safety
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Applications
Mobilmet Alpha, Sigma, Gamma, and Omega are designed for a wide variety of
metal cutting operations, severities and metallurgies. Specific applications,
by grade, include:
- Mobilmet Alpha cutting oil is the lowest-viscosity product in the series. It is recommended for deep-hole or gun drilling. It can be used on a variety of metals including stainless steels, high-nickel steel and heat-resistant alloys, and in most machining operations.
- Mobilmet Sigma cutting oil provides outstanding performance in general-purpose machine operations. It is recommended for nearly all machining operations on ferrous metals, except heavy-duty operations where tolerance and finish are critical, or for operations such as deep-hole drilling where a low-viscosity oil is needed. It is suitable for all kinds of steel under normal cutting duty. Where staining is not critical, it may be used on brass, bronze, or other copper-bearing alloys.
- Mobilmet Gamma is recommended for more severe operations, such as heavy-duty threading, tapping, and broaching on difficult-to-machine metals. Unlike many conventional heavy-duty cutting oils, however, Mobilmet Gamma will operate efficiently on less-difficult materials. Where staining is not critical, it may be used on brass, bronze, or other copper-bearing alloys.
- Mobilmet Omega is an extremely heavy-duty cutting oil for hard-to-machine metals that must be broached, tapped, or threaded.
Typical Properties

| 
Mobilmet Alpha
| 
Mobilmet Sigma
| 
Mobilmet Gamma
| 
Mobilmet Omega
|
| Viscosity, ASTM D 445 | | | | |
| cSt @ 40º C | 18.45 | 29.88 | 33.84 | 42.6 |
| cSt @ 100º C | 4.0 | 5.4 | 5.8 | 6.8 |
| Viscosity Index, ASTM D 2270 | 120 | 122 | 121 | 119 |
| Specific Gravity @15º C kg/l, ASTM D 1298 | 7.227 | 7.3 | 7.329 | 7.46 |
| Total Sulphur, ASTM D 2622, wt-% | 1.452 | 1.517 | 1.638 | - |
| Active Sulphur, ASTM D 1662, wt-% | 0.695 | 0.867 | 0.904 | 1.90 |
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.
The Mobil logotype, the Pegasus design are trademarks of Exxon Mobil Corporation, or one of its subsidiaries.
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