Keywords
- Tribotesters
- Tribology
- Tribotesting
- Four Ball EP
Tester
- Four Ball Wear
Tester
- 4 Ball EP &
Wear Tester
- Wear &
Friction
- ASTM D4172
- ASTM D2596
- ASTM D2783
- ASTM D2266
- D5183
- IP 239
- Shear
Stability
- Additive
Screening
- Adhesive Wear
- Aerospace
Materials
- Anti-Wear
Properties
- Automotive
Materials
- ball on disc
- bearing
materials
- bioengineering
materials
- block on ring
- ceramics
- coatings
- composite
materials
- corrosion and
wear
- delamination
wear
- dry contact
conditions
- dynamic
friction
- extreme
pressure properties
- extrusion
- face seals
- fatigue life
- ferrous
materials
- friction
coefficient
- gear materials
- hertzian
contact
- load carrying
capacity
- LPV testing
- metal matrix
composites
- mixed
lubrication
- non-ferrous
materials
- oscillating
contact
- oxidative wear
- pin on disc
- pin on vee
block
- pitting
- plastics
- powder
metallurgy
- PV diagrams
- quality
control testing
- rolling
- rolling
contact fatigue
- rolling
element bearing
- rolling four
ball
- screening of
lubricants
-
self-lubricating materials
- shear test on
lubricants
- sliding four
ball
- surface
engineering
- surface
treatments
- taper roller
bearing
- thrust washer
- VI improvers
- wear
coefficient
- wear mapping
- Lubricants
- Grease
Description
The
Four Ball Tester is used to test the Wear Preventive
(WP) and Extreme Pressure (EP) characteristics of
greases and lubricating oils in sliding
steel-on-steel applications. The point contact
interface is obtained by rotating a 12.7mm diameter
steel ball under load against three stationary steel
balls immersed in the lubricant. The normal load,
frictional force, and temperature can be monitored
using trop. software, the supplied Windows-based
Data Acquisition Software. The rotating speed,
normal load, and temperature can be adjusted in
accordance with published ASTM and IP test
standards. For evaluating the Wear Preventive
characteristics of lubricants, the subsequent wear
scar diameters on the balls can be measured using a
graduated-scale microscope. The wear scar can also
be captured using an optional Digital camera and
measured using our Wear Scar Analysis Software. For
evaluating the Extreme-Pressure (load-carrying)
capacity of lubricants, the normal load at which
welding occurs at the contact interface can be
recorded.
Specifications
Conforms to:
ASTM D2266, D2596, D2783, D4172, D5183; IP 239, IP
300
Electrical Requirements:
220V, 60Hz*
440V, 50Hz*
Drive Motor Power: 1.5 kW
Test Speeds: 50 - 3000 rpm (Thru variable
drive)
Load: 15 kgs to 1000 kgs
Test Duration: 1 to 9999 min
Test Ball diameter: 12.7mm
Temperature: Ambient to 200 Deg. C |