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3.2.2.1 The wear scar diameter
Fig 2 shows the wear surface if a medium load is applied. The wear scar diameter is in
accordance with the static deformation rate.
Fig 2
If during the test a state of equilibrium occurs, in other words there is no further wear, the
balance scale bar will stop going down.
By using additional option 2 (torque display) you can make visible the size and the
progress of the wear over time while the test is still ongoing.
During the 1-minute test several friction peaks, i.e. several wear periods, may occur.
However in most cases no further wear occurs in the last 30 seconds so that the wear scar
diameter can be based on to MEASURE THE WEAR RATE.
The amount of steel abraded from the bottom ball approximately equals the 4th power of
the wear scar diameter.
You can use the VKA measuring microscope (item no. 002.00403) to measure the wear
scar diameter.
Place the 3 test balls on a plate with locating holes.
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