The Falex Four-Ball Extreme Pressure (E.P.) Test Machine is used to measure the extreme pressure properties of
lubricants under a variety of test conditions. The machine is used to determine the load carrying properties of a
lubricant. Two determinations are made: load-wear index and weld point.
The Falex Four-Ball E.P. Machine rotates a ½" diameter ball in contact with three similar balls held stationary. The
rubbing surfaces are covered with the fluid under test. In the ASTM tests, the upper ball is rotated at 1800 rpm and the
lubricant is at ambient temperature. An axial force between 6 and 1000 kilograms is applied through the three
stationary balls to the rotating ball. A series of 10-second duration tests is run at increasing load increments using a
new set of four balls for each load. The size of the wear scars obtained on the three lower balls from each test is
measured. The test is generally terminated at the load when the rotating ball welds to the other three balls.
Friction between the rotating ball and the three clamped balls tends to rotate the test oil cup where the three balls
are clamped. A friction measuring attachment can be purchased that records this force. Coefficient of friction can then
be calculated.
This machine is available in two models : a Single Speed or a Variable Speed version. A Temperature Control
System is available as an option.
An optional disc adapter can be used to replace the three stationary ball holder. This allows the use of a variety of
metals, not generally available in ball form.
F-1518 Standard Falex Four-Ball E.P. Test Machine:
Standard items included with machine: 2 HP Motor
Ball Holder Assembly
Digital Shut Off Timer
Mounting Table
Loading Weights, 50 kg Loading Weight Holder
Upper Ball Chuck Unloading Mechanism
Accessory Drawer
Multi-Position Load Lever
F-1518-1 Electronic Friction Measurement System:
Includes:
Load Cell
Digital Indicator Panel Mounted High Response Recorder
2½ " wide chart
F-1518-1A Chart paper for FX-1518-1 (10 Charts per Box)
F-1518-2 Temperature Control System:
Includes:
heaters
digital temperature controller modified ball holder assembly
automatic temperature start-up, maximum temperature 175°C
F-1518-3 Variable Drive Motor System:
2 HP Variable Speed Motor and DC Controller with 1% full scale speed control accuracy. Panel mounted Digital Speed
Indicator. Maximum spindle speeds 3750 rpm. 2 pulley ranges.
F-1518-4 Disc Adapter:
Permits use of ¼" diameter by 1/16" thick disc in place of lower balls for alternate material combinations.
F-15196 Disc Fixture:
For punching disc from 1/16" sheet stock (must be used with arbor press).
F-1518-5 Mechanical Shear Stability Adapter:
Mechanical shearing adapter incorporating a tapered roller bearing. Uses 40 ml test fluid. Widely used in Europe and
currently under DIN standardisation.
F-1518-5A Mechanical Shear Stability Adapter Test Bearing:
F-1518-6 Ball Cup Assembly:
With parts for clamping 3 lower balls.
F-1518-6A Ball Cup Assembly:
Same as FX-1518-6 but with Thermocouple for FX-1518-2.
F-1518-7 Ball Chuck for FX-1518
F-1518-8 Thermocouple
F-1518-9 Pitting Detection Device:
Used when determining onset of fatigue when evaluating materials under rolling four-ball conditions. Meets the
requirements of IP 300 "Rolling Contact Fatigue Tests for Fluids in a Modified Four-Ball Machine". Requires purchase
of FX-1518-9A.
F-1518-9A Rolling four-Ball Cup Assembly:
Accommodates lower rolling specimen race (FX-1518-9B) for testing under rolling conditions. Includes one lower
specimen race (FX-1518-9B).
F-1518-9B Lower Rolling Four-Ball Specimen Race:
Used when testing materials under rolling conditions. Requires Rolling Four-Ball Cup Assembly (FX-1518-9A).
F-1518-10 Spare Parts Kit:
Recommended spare parts kit for two years operation, includes:
Gearbelt (1)
Thrust Bearing (1) 5 Amp Fuse
F-1519-50 Falex Test Specimen Balls:
Test balls conform to ASTM D 2266, D 2596, D 2783, and D 4172 (500/box)
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