SCANMASKIN Ferox 300, Manual

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6.3 Wear & tear on the blast wheel and shot cage
The blast wheel (Appendix diagram No. 123) is a pure wear & tear part and must be checked re-
gularly. Scanmaskin recommend a fi rst check after 30 hours of blasting. The life of the blast wheel
depends on the application of the machine.
For example a lot of wear & tear occurs when blasting soft concrete with a lot of surface fat. Con-
crete dust is a very aggressive substance and increases wear & tear enormously. This decreases
when blasting steel or ceramic tiles. To give an accurate fi gure for the lifetime of the wheel is the-
refore impossible. As a rough guide, this could be anywhere between 30 and 60 hours.
Take off the shot hose (Appendix diagram No. 133) in between the shot valve and the shot enter
pipe (Appendix diagram No. 129). Loosen the four nuts which secure the blast wheel cover (Ap-
pendix diagram No. 125) to the machine. Remove the blast wheel cover carefully. Between the
blast wheel cover and the blast chamber is a rubber sealing which may, during the process of
operation stick to both sides. Pay special attention not to tear or rip it. Failure to do so will result in
damage to this sealing.
Now the blast wheel should be visible. In the middle of the blast wheel there is a hexagonal shap-
ed screw. Loosen the screw and remove the wheel from the blast chamber. Check the wear & tear
on the wheel. The thickness of the six blades should not be less than 5 mm. If less, the blade could
break and destroy the whole wheel. Also check the distribution fi ngers on the inside of the wheel
for wear & tear.
The shot cage (Appendix diagram No. 127) is like the blast wheel – a pure wear & tear part and
must be checked regularly. Two different kinds of wear & tear on the cage are possible. The win-
dow in the cage has a width of 45 mm. Change the cage if this width is more than 50 mm. The se-
cond type of wear & tear is the decrease in the thickness of the cage wall itself. Change the cage
before a hole appears. If the blast wheel and cage are in a good condition replace the parts using
the opposite direction to that described above.
6.4 Wear and tear on the linings
The blast chamber and a large part of the reclaim chamber are protected by linings. These pre-
vent the machine from destroying itself. The linings must be changed if the thickness is less than
one third of the original thickness in any one place. The most wear & tear happens to the side (Ap-
pendix diagram No. 1) and top linings (Appendix diagram No. 3) of the blast chamber. The thick-
ness of these linings is 10 mm. Should the wear & tear be more than 6 mm they must be changed.
If they are changed too late, the machine will blast a hole in it’s frame in a short time.
6.4.1 Changing the linings
On both sides of the Ferox300 are the side covers (Appendix diagram No. 81 and 83) for the
reclaim chamber and blast chamber. Remove the side covers by loosening the screws. The side li-
nings can now be easily removed. On the upper end of the blast chamber are three screws direct-
ly under the turbine motor. Loosen the nuts of these screws and turn them out by 8 mm.