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Hammer K3 Improving dust collectionn
We Hi,
i recently purchased a second second hand Hammer K3 from a fellow forum member and after bringing it home, reassembling and a bit of fettling I just needed a dusty to start using it. I picked up a 3hp Ledacraft on Friday and today I made some adapters to connect from the 150mm dust outlet to the 120mm saw inlet via a couple of metres of 125mm Flexi hose. This is all temporary And improvements to the dusty and piping will happen in due course.
Anyway, after starting the dusty I seemed to have pretty decent air flow at the end of the hose, no science just feeling and it seemed OK to me if not as good as it could be. As soon as I hooked the hose to the saw though the suction and airflow dwindled to asthmatic wheeze. A few test cuts showed it was pretty pathetic. I should add the caveat that the blade guard was broken on the machine so that wasn’t fitted and I wasn’t extracting from there at all, but none the less it was still terrible.
So the problem was pretty apparant, the 120mm inlet immediately reduces to 94mm and a 100mm Flexi hose that goes to a blade shroud that is also a choke point with only a 115 x 35mm outlet.
Clearly there is a lot of room for improvement but before I go reinventing the wheel has anyone else made any modifications to their K3. The easiest option would be to just enlarge the port, do away with the blade shroud and extract from the cabinet, however I have my doubts about the effectiveness of this. Alternately I can rebuild the shroud improve the size and transition to round pipe and open the outlet size. It goes without saying I will do something about the blade guard and am leaning towards a Felder style sliding blade Gaurd extraction setup.
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Chers Andrew