Mobil Vactra Oil Numbered Series
Way and Slide Lubricants
Product Description
The Mobil Vactra Oil Numbered Series are premium-quality lubricants specifically designed to fully meet the
requirements for accuracy and parts finish of today's high production machine tools. They are formulated from
high-quality base stocks and performance balanced with a progressive additive system that provides low frictional
properties, excellent corrosion protection and foam resistance. A unique advanced additive package helps
reduce stick-slip and chatter under thin film, boundary lubrication conditions. This allows smooth, uniform motion
at design travel speeds. The Mobil Vactra Oil Numbered Series have been optimised to provide excellent
separability from aqueous coolants in coolant systems while minimising the corrosive effects of high pH coolants
on lubricated surfaces.
The base stocks and additive package have been carefully seleced to protect slides and ways while still providing
good filterability. This is important because reduced flow or plugged applicator filters will increase stick-slip,
chatter and wear. The metal-wetting and adhesive agents form uniform films that resist squeezing from way
surfaces while the machine is not in operation.
Features and Benefits
The Mobil Vactra Oil Numbered Series oils have been developed and specifically designed to provide an extra
margin of machinery protection by satisfying the stringent demands of the slide ways while meeting the
requirements of the other lubricated components of the machine tools. They exhibit excellent lubricity and
load-carrying performance contributing significantly to improving the production of quality parts. Their outstanding
oxidation and thermal stability characteristics improve machine cleanliness, provide desirable filterability properties
and reduce the need for frequent maintenance services. The Mobil Vactra Oil Numbered Series provide excellent
separability from water and aqueous coolants reducing the potential negative effects of cross contamination
enhancing the service life and performance of both the lubricant and the coolants.
Feature Advantages and Benefits
Helps eliminate chatter and stick-slip of slides and ways
Improves finish and quality of parts Helps reduce wear
Low Frictional Characteristics
Helps reduce wear and increases smoothness of sliding
action
Lubricity
Prevents removal of lubricant from critical surfaces
Protects surfaces from attack of high pH coolants
Adhesiveness
Extends lubricant life and performance Improves
aqueous coolant life
Water and Aqueous Separability
Extends oil service life Keeps sliding surfaces and other
lubricated components clean Helps reduce filter change
frequencies
Oxidation/Chemical Stability
Helps reduce the deterioration of sliding services and
associated maintenance Improves the quality and
productive capacity of finished parts
Rust and Corrosion Protection
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Feature Advantages and Benefits
Allows removal of fine abrasives that could damage
components or parts finish Reduces filter change
frequencies
Filterability
Multi-metal Compatibility Works with ferrous and non-ferrous materials
Applications
Mobil Vactra Oil Numbered Series products are recommended both as slideway lubricants and as fluids for
moderate service machine tool hydraulic systems. These oils are designed for use with all combinations of cast
iron, steel and non-metallic way materials. Mobil Vactra Oil Numbered Series may be applied by hand, forced-feed
lubricator or in flood application by circulation system. Their extreme pressure properties make them suitable
for all types of gears found in machine tools. They should not be used in circulation systems wher bulk oil
temperatures exceed 66ºC.
• Mobil Vactra Oil No. 2 is recommended for horizontal slideways on small to medium size machine tools.
It is also suitable for flood application in large machines
• Mobil Vactra Oil No. 3 is recommended for dual-purpose gear and way lubrication systems
• Mobil Vactra Oil No. 4 is the normal recommendation for large machines wher way pressures are high
or good precision is required. It is also recommended for vertical and inclined slideways wher drain-down
can be a problem
• Mobil Vactra Oil Numbered Series can be used for lubrication of ballscrews, linear guides, headstocks,
translating screws, spur and bevel gears, and lightly loaded worm gears
• Applications wher conventional mineral oil contamination of the aqueous coolants shortens coolant batch
life
Specifications and Approvals
Mobil Vactra Numbered Series has the No 1 No 2 No 3 No 4
following builder approvals:
Cincinnati Machine
P53 X
P47 X
P50 X
Typical Properties
Mobil Vactra Oil Numbered Series No. 1 No. 2 No. 3 No. 4
ISO Viscosity Grade 32 68 150 220
Viscosity, ASTM D 445
cSt @ 40ºC 31.5 67.78 155.9 220.9
cSt @ 100ºC 5.27 8.6 14.5 18.3
Viscosity Index, ASTM D 2270 96 96 96 96
Copper Strip Corrosion, ASTM D 130, 3 h 1B 1B 1B 1B
@ 100ºC
Rust Protection, ASTM D 665A Pass Pass Pass Pass
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Mobil Vactra Oil Numbered Series No. 1 No. 2 No. 3 No. 4
FZG Load Support, DIN 51354, Fail Stage 13 13 13 13
4-Ball Wear, Scar Dia, 20 Kg, 54ºC, 1800 0.25 .25 0.25 0.25
RPM,1 hr, ASTM D 4172, mm
Weld Load, 4-Ball EP, ASTM D 2783, kg 200 200 200 200
Pour Point,ºC, ASTM D 97 -30 -33 -6 -3
Flash Point,ºC, ASTM D 92 216 228 248 240
Specific Gravity 15C/15C, ASTM D 1298 0.869 0.883 0.887 0.892
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. MSDSs 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 and Vactra are trademarks of Exxon Mobil Corporation, or one of its
subsidiaries.
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