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By PaulR
#1241509
Hi,

Has anyone modified their bandsaw to include under the table dust extraction ?

I’ve got a record 350 and have bought an Axminster adapter that gives me a 63mm output from the 4 inch port at the base, I’m just looking for inspiration on how to run / attach a pipe to end up just under the table by the blade

Any photos or ideas would be greatly appreciated !

Paul


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By Eric The Viking
#1241511
Have you used the search function on the forum? This has been discussed seveal times.

In short, my own machine (12" SIP "heavy duty") came with a very good system made from plastic waste pipe by the previous owner (to connect it to a shop vac hose), just under the table. Sorry to say, the big port at the bottom is pretty useless (for several reasons). The DIY system is probably a bit noiser than a proper extractor (or at least the vacuum is old ans screams a bit), but much better.

If you have further questions, I suggest picking up on an old thread rather than starting a new one, as it keeps all the thoughts together so it's easier for others to find.

E.

PS: bandsaw designs haven't changed in many decades, so the solutions to the problem haven't either. It annoys me that those big ports at the bottom are still popular with the big brands, as they don't really work except on the smallest machines, unless you can generate a typhoon with your extractor (and even then there aren't enough holes in most bandsaws to get enough air movement).
Last edited by Eric The Viking on 14 Sep 2018, 06:51, edited 2 times in total.
By sunnybob
#1241514
I've modified my axminster 350.

I sealed off the lower 4" port completely.
On the angled higher port I cut a hole on the top side and built a box under the table. It works extremely well. If I tilt the table I have to remove the box, but thats only happened a couple times in three years.

I have pictures somewhere, I'll look them out.
By sunnybob
#1241516
The hose is 62 mm

bandsaw box small.jpg


This is the lift off box. There is a rear piece that stays in place. there are small magnets that hold the lift off to the rear wall.
box small.jpg
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By Eric The Viking
#1241520
I'm working on a new system myself, but the clearance under the SIP table is tiny. The previous owner raised the table on a big block to make space, but that brings other issues with it, so I want the table height back as it was originally.

I have a plan and a prototype, but it's not quite there yet. The table is cast iron though, which makes attachment reasonably easy.

Bob, I doubt the main port is doing much - I'd try to restrict it inside the lower cabinet so you just get fast airflow as close to the lower guides as you can. I think most of the dust capture will be your neat "hopper" arrangement.

E.
By sunnybob
#1241530
Erik, the lower 4" port in the lower wheel cabinet has been completely blocked off. What dust does collect down there is easily vacuumed out something like once very month or so.

The higher angled port I'm using connects to a small compartment where the blade brush trys to clean the blade as it enters the lower cabinet.

The system works extremely well, even producing a suction at the perforated plate on the table. When i finish sawing and the blade stops, I can brush the loose dust on the table over the central plate and it gets sucked down into the system.
By PaulR
#1241550
Brilliant thanks guys for the quick responses and photos, I very much like the idea of the made up box and magnets.

I’ll try it with the 4 inch not blocked first, but easy enough to change that if it turns out to be useless (I’ve got a 100mm pipe coming into it anyway which the 63mm branches off the same adapter).

Sunnybob where did you source the pipe adapters from ? Are they specialist dust extraction pipes or something more generic ?

Eric yes I did use the search function but found nothing , even though I know it’s been covered before, must be something wrong with the way I’m doing it, will need to try again


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Last edited by PaulR on 14 Sep 2018, 15:33, edited 2 times in total.
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By Tasky
#1241585
What Chris152 has posted above looks rather good, to me.

I saw a Rob Cosman video where he implemented something similar, using the plastic extension tube of a nomal vacuum cleaner, that covers both sides of the blade under the table.
It was a bit of a bodge, to be honest, but fundamentally not a bad idea and would work well with a bit of thought.

I plan to do something along these lines myself on my Axi 310, when I get the time...
By Rorschach
#1241589
Tasky wrote:What Chris152 has posted above looks rather good, to me.

I saw a Rob Cosman video where he implemented something similar, using the plastic extension tube of a nomal vacuum cleaner, that covers both sides of the blade under the table.
It was a bit of a bodge, to be honest, but fundamentally not a bad idea and would work well with a bit of thought.

I plan to do something along these lines myself on my Axi 310, when I get the time...


I tried that method, it didn't really work well for me.
By sunnybob
#1241607
I tried the pipe elbow thing, very unimpressed. I even slit the elbow so the blade ran though the centre of the elbow. nah.

I used 100 mm to 62 mm adaptor (my extraction is 62 mm from the machines to the cyclone) and smoothed off the edges untill one was an interference fit with the other.

I made the box out of 3 mm ply, meaning to make a better one once i had proved it worked. But it worked so well the "if it aint broke dont fix it" rule was applied.
heres the actual adaptor modified, and the rear wall plate.
small port.jpg
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By Eric The Viking
#1241611
It worked brilliantly for me - almost nothing in the wheel cupboards at all. Search for old threads - I drew it up in SU, I think.