down draft table

[mark smith 20Participant @marksmith20]

Posted by clogs on 25/03/2017 08:38:39:

Hi Mark,

that dust extract table looks great, I'm sure it'll work fine but I found that however good the dust extraction is there is always stray airbourne dust……

I work a lot with Oak and it get's me every time……. lucky enough my workshop is quite long and I can get a thru draught running quite naturally which is handy as it gets a lot of the dust outside but still this airbourne dust just keeps falling down….

Hence the the overhead dust catcher, been using them for years……As they cost nothing really, give it a go u'll be surprised in the air quality…..actually all my fans came from bathroom upgrades and a skip…..they not so noisy and I think they move something like 10'ish cubic meter's of air per hour….

I also found that even when turning wood, making shavings u still get a lot of dust…….I have a dust/shavings funnel connected to a 4"in shop vac running when turning plus a dedicated dust catcher directly over the lathe……I have even tried an air fed mask but just can't get on with it so sold it, I think it was a "Trend" well certainly U.S. made, nice peice of kit but it was just me…….

Give it a try, u know u want to…..hahaha….

good luck……Clogs

Hi Clogs , yes i`ll keep this in mind as i could use with my dust extractor.

I still intend building something like this . I found a manual for the axminster version of the previous one i linked to .

**LINK**

Im still unsure how they work though , i assume that the fan would go in the middle of the enclosure if i used a fan like this

**LINK**

hr-/301794039113?hash=item4644539549:g:KtkAAOSwAYtWP8l5

What sort of motors do these fans have and are they likely to be noisy?

The rectangular outlet of the fan is fixed to the back side with a grill of some sort over the opening.

I would need to enclose both ends and perhaps the top of the fan with some type of slide in pleated filters?

One thing i dont understand is where does all the dust go ,does it just all collect in the bottom of the unit and around the filters???

Does any dust blow out of the outlet grill??

Any advice appreciated.

I reckon i could make a decent bench/table for under £200 , as opposed to £1000 that axminster are asking . I mean its basically just a large box .

 

Edited By mark smith 20 on 25/03/2017 11:01:44

[CirclipParticipant @circlip]

Don't take long to block a filter, Cyclones are much more effective.

Regards Ian.

[Ian S CParticipant @iansc]

You might not be using Pernambuco much longer it is to be subject to CITES trade control, and the only legal sale is of used/salvaged timber, from what I see carbon fiber is the way of the future. The people in Brazil should be planting trees, instead of clearing the bush as they are now. The felling of the rain forests all over the world is probably THE most important thing in the control of the climate.

Only want to upset those who are clear felling the rain forests.

Ian S C

[mark smith 20Participant @marksmith20]

Hi Ian, Yes i know all this ,I use wood that is around 50 year old or older , from private stocks etc….. and have enough for the next 10-15 years .

There is a big organisation which is supported by bowmakers who are actively replanting trees.

I am also against deforestation of any type. The biggest destroyers of forests are cattle farming and palm oil at the moment .

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