Is on top or bottom best "dust extraction"

**bitingmidge** · 17th July 2005, 09:15 PM

Today, I ripped 50 or 60 m of 19m hardwood, while pondering all the dust flicking out the back. (DC connected below the table only)

The mess was quite incredible, but at the end of the day it amounted to a lot less than a tenth of the total, still not good.

Using Grr-rippers it is not possible to collect overhead in any meaningful way, and after the 100th cut, I realised that the majority of what is coming out seems to just shoot out as the end of the cut is reached. Most of this is quite fine dust as well.

I'm thinking about mounting a "bucket" for want of a better term level with the table and connected to the DC, to see if the suction is sufficient to overcome the inertia of the particles.

Last time we discussed this topic, we got to the vacuum up the sleeve stage as I recall, but I haven't tried that yet either! Consensus then was that overhead guards don't really do the trick; do we now have a different experience?

cheers,

P

**Groggy** · 17th July 2005, 09:31 PM

Originally Posted by Steve.Bisson@te

G'day Groggy,

I've spent a large portion of this morning setting up a SUVA dust collection system on my MJ-2331 (Timbecon branded) 12" contractor's saw, using an overhead post method.

Given the height of the standard splitter assembly, the dust collector hood is still proud of the table by around 30MM.

I think that I'm going to have to find some acrylic or such to bond to the dust collector hood to bring the edges close(r) to the table; ditto the rear of the collector.

In short, it works, but would (I think

) work better if I managed to clse the gap to the table.

I'll also say that the assembly instructions left much to be desired, and even more to the imagination

Anyway, some pics!

Cheers!

Steve, that is a great setup (it prompted me to start the other thread in fact).

Soundman's idea of the brushes is a good one. Another way may be a parallel fence that swings up.

I agree with you about poor instructions, I don't know why they bother sometimes.

Anyway, nice setup!

**journeyman Mick** · 17th July 2005, 10:40 PM

Does the documentation tell you what "SUVA" stands for? Or perhaps someone knows, I'm assuming they didn't name it after the place in Fiji

Mick

**Groggy** · 17th July 2005, 10:49 PM

Mick, I am wondering if the SUVA name is generic for a guard attached to an overhead arm. I've seen dozens of variations that are all called "Suva". The only thing in common was a boxy shaped guard and an arm that hangs it over the blade.

**Auld Bassoon** · 18th July 2005, 08:20 AM

Originally Posted by journeyman Mick

Does the documentation tell you what "SUVA" stands for? Or perhaps someone knows, I'm assuming they didn't name it after the place in Fiji

Mick

G'day Mick,

The documentation that came with the dust collector desn't mention what the acronym stands for, but I understand that it's the Swiss Accident Insurance Fund which, among a number of of its activities, mandates the use of this type of dust collector, especially for commercial/industrial use.

Cheers!

**theRat** · 18th July 2005, 02:39 PM

The brush idea sounds good. I have seen door draft seals that would propably work at bunnings for about $10. The brush part is about 40-50mm long on one of them and they have double sided tape to stick them on with after cutting to the required length.

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