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Test balls:
Preferably use SKF test balls, 12,700 G 20 DIN 5401, made of 100Cr6(W3) rolling
bearing steel with a hardness of HRC 64+/-1 (item no. VKA-00020).
In addition, you can also use the following test balls from Hansa Press
RB 12.7 MM / G10 / Material: 1.3505 (B1) 100Cr6 / hardness HRC 64 +/- 1
(item no. VKA-00136)
Balls made from other materials or with a different hardness will not produce comparable
and hence inaccurate test results.
You must use a new set of 4 steel balls for each test.
2.7.1 Applying a load on the ball cup
Place the ball of the ball holder on top (in the centre) of the three balls of the ball cup that
holds the test balls and the test lubricant.
Afterwards place the tip (pos. 34) of the ball cup into the pan (pos. 41) of the rotary plate
(pos. 21).
Swivelling the release lever upwards (pos. 32) will apply the load (weight).
When you apply the load, swivel the release lever upwards slowly and carefully to
avoid damage to the balls that is worse than the wear scars visible after a test run.
This is especially important when it comes to loads of between 500kg and 1000kg as the
strain on the individual parts, in particular the cutter holder, is already quite high.
After applying the load, clamp the release lever into the holder mounted at the housing
(pos. 47).
Prior to powering up the motor ensure that the ball cup measuring arm is coupled to the
carrying arm via the support supplied (pos. 38) to prevent the ball cup measuring arm from
swerving during a test run.
Warning:
A test only starts after the motor has been switched on and the load has been applied.
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