Product Data
Castrol Optigear BM
®
Castrol Optigear BM- solid-free gear oils for extremely high pressures containing a newly
developed additive combination. Designed to reduce wear caused by surface fatigue,
pitting, spalling, scuffing, scoring or irregularities during running-in period also where
conventional EP gear oils or oils with solid lubricants fail.
MICROFLUX TRANS® (TRANS=TRiple Action Non-sacrificial Surface engineering)
improves friction surfaces to an extent not possible with normal machining processes and
conventional EP lubricants. In a tribological system the polarized MICROFLUX TRANS
additives instantaneously create a passive film on friction surfaces before friction occurs.
At a given load level, the MICROFLUX TRANS additives creates resistant protective layer
on friction surfaces. Under severe load, components of the MICROFLUX TRANS additive
combination are activated and diffuse into the surfaces initiating an improvement of their
friction characteristics through plastic deformation. The organic reaction products become
a component of the tribopolymer system. Unlike the case with conventional lubricants, the
tribopolymers formed by MICROFLUX TRANS are long-chained compounds with
excellent lubricity and adhesion. The load carrying area is improved, a hydrodynamic
lubrication film is easier to maintain. This unique physio-chemical reaction is CASTROL
surface engineering and achieves a non-sacrificial micro-smoothing of the friction
surfaces. The MICROFLUX TRANS additive technology provides optimum wear
protection and an extremely low coefficient of friction even under extremes of pressure,
vibration, shock loads, at high or low speeds or varying operational conditions.
Advantages
shortens running-in periods and allows running-in of lubrication surfaces under full
load from the start
outstanding load carrying capacity
optimum wear protection in high load range
excellent anti-wear properties
smoothing of existing pitting
surface improvement to an extent not possible before
increase of supporting surfaces and load carrying capacity (70 - 80% after initial run-
in)
reduction of noise levels
extreme long oil drain intervals
low foaming tendency
extremely low coefficient of friction resulting in energy savings
compatible with nonferrous metal
compatible with paints and conventional seal materials
excellent corrosion protection
exceeds AGMA specifications 250.04 for EP gear oils
Castrol Industrial Americas
150 W. Warrenville Road
Naperville, IL 60563
Castrol Optigear BM – 3-Sep-04 Tel (877) 641 1600
Page 1 of 3 Fax (877) 648 9801
Product Data
Usage
In all types of industrial gears, especially operating under extremely heavy loads, even
where conventional EP oils fail:
gears exposed to high sliding friction and high Hertzian surface pressures up to 2000
N/mm2 (elevators, rolling mills, belt conveyors, extruders, vibrating equipment,
crushers, high speed looms, rear axles, separators
eccentrics, cam shafts, planetary gears
variable speed drives (PIV)
hypoid gears (API-GL5/GL6)
In all types of bearings, especially for spherical roller bearings, full complement
cylindrical roller bearings, thrust bearings
For sealed gear couplings
Cost-benefit offered by MICROFLUX TRANS additive technology
extended lifetime of machine elements and wear parts, lower maintenance and labor
costs by minimized wear and friction
full load operation within shortest time, virtually eliminating the running-in period
lower costs for lubricants and waste oil disposal because of significant extensions of
both service life and relubrication intervals
energy savings due to reduced coefficient of friction, lower temperature of lubricant
and component, improvement in operating efficiency
product consolidation, i.e. simplification and reduction of lubes and spare parts
reduction of noise resulting from high frequency stick-slip
for "life" lubrication in some applications
Application
Viscosity recommended by equipment manufacturers must be followed. Miscible with all
unleaded gear oils based on mineral oils.
Maximum performance only if applied unmixed.
Castrol Optigear BM oils can be filtered in all common filter systems and separators due
to their homogeneous, oil soluble additives.
Attention: Not for use in synchronized gears and for limitedslip/self-locking differential
gears.
MICROFLUX TRANS® registered trade mark of a patented Castrol additive combination
for performing surface engineering in tribological systems.
Castrol Industrial Americas
150 W. Warrenville Road
Naperville, IL 60563
Castrol Optigear BM – 3-Sep-04 Tel (877) 641 1600
Page 2 of 3 Fax (877) 648 9801
Product Data
Typical Characteristics
Unit 68 100 150 220 320 460 680 1000 3000
Color - brown brown brown brown brown brown brown brown brown
ISO viscosity group 68 100 150 220 320 460 680 1000 3000
AGMA - 3 EP 4 EP 5 EP 6 EP - - - -
Specific gravity @ g/cm3 0.88 0.89 0.89 0.90 0.91 0.91 0.92 0.92 0.91
60°F
Kin.viscosity, @ 40° mm2/s 71.3 101 157 218 320 459 670 1000 3000
C/104°F, ASTM D-
445
Kin.viscosity,@ 100° mm2/s 9.4 11.4 15.0 18.8 24.3 30.6 37.8 50.0 122
C/212°F
Viscosity index, VI 109 99 95 97 97 96 94 95 117
ASTM D-2270
Flash Point, COC, °C 219 224 224 232 238 238 238 260 260
ASTM D-92
°F 425 435 435 450 460 460 460 500 500
Pour Point, ASTM D- °C -24 -24 -18 -16 -15 -12 -9 -9 0
97
°F -11 -11.2 -0.4 +3.2 +5.0 +10.4 +15.8 +15.8 +32
Copper corrosion
48h/100°C/212°F - 1a 1a 1a 1a 1a 1a 1a 1a 1a
ASTM D-130
SRV test run
Test mode 5 ae(2h,
300N,
50°C/122°F/ball/area)
DIN 51834
Friction coefficient µ (min) 0.030 0.030 0.030 0.030 0.025 0.025 0.025 0.025 0.025
Friction µ (max) 0.130 0.130 0.130 0.130 0.130 0.130 0.130 0.130 0.130
coefficient(running in
period)
Wear mm 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85
ball/scar ∅ µm 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8
FZG Damage >12 >12 >12 >12 >12 >12 >12 >12 >12
Boundary lubrication load
A/8, 3/90 stage
DIN 51345 mg/
Seal compatibility % -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5
Volume change
SRE-MBR1
Shore hardness Shore +3 +3 +3 +3 +3 +3 +3 +3 +3
Subject to usual manufacturing tolerances.
All reasonable care has been taken to ensure that this information is accurate as of the date of printing.
Nevertheless, such information may be affected by changes in the blend formulation occurring subsequent to
the date of printing. Material Safety Data Sheets are available for all Castrol products. The MSDS must be
consulted for appropriate information regarding storage, safe handling and disposal of a product.
Castrol Industrial Americas
150 W. Warrenville Road
Naperville, IL 60563
Castrol Optigear BM – 3-Sep-04 Tel (877) 641 1600
Page 3 of 3 Fax (877) 648 9801
