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Adequate Dust Collection CFM for bandsaw

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Forum topic by AndyJ1s posted 09-08-2019 10:06 PM 449 views 0 times favorited 14 replies Add to Favorites Watch
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AndyJ1s

58 posts in 239 days


09-08-2019 10:06 PM

Topic tags/keywords: dust collection bandsaw

Planning on purchasing a new 14 – 18” bandsaw, and wondering how much CFM they really need for dust collection.

Laguna says 1000 CFM/minute for both their 14” and 18” BX bandsaws.

Ricon does not say, but has same dual 4” ports as Laguna.

1000 CFM seems ridiculously high for a 14” bandsaw, unless they’re using the same CFM ratings as some dust collectors… In other words, “you need a dust collector that is typically rated at 1000 CFM”.

Is that really how much CFM it takes to suck the dust a bandsaw can put out?

I’m looking at an Oneida Mini Gorilla rated at 500 real CFM at 4” WC. It’s curve shows it will easily handle the Hammer A3-41 16” jointer/planer’s recommended CFM @ WC (when converted to imperial units).

I plan to roll the DC around, connecting it to one machine at a time through a 5” hose, 10’ long, in a 2-car garage that has to house 1 car overnight, so a big DC piped to stationary tools is not an option.

What say you all?

Andy


14 replies so far

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Andybb

2032 posts in 1088 days


#1 posted 09-08-2019 11:20 PM

I have a 1412 Laguna in a 2 car garage that houses 1 car at night. The issue on all band saws doesn’t seem to be the CFM but the open space under the table. Even my shopvac system can handle the dust it creates just fine even when doing a 12” resaw. I used PVC and magnets. I cut a 4” PVC pipe down one side, put it in the oven to flatten it out then shaped it to seal that area. The only things my shop vac can’t handle are my planer and jointer as the chips are just too big when the 4” outfeed meets the smaller shopvac hose. I can live with that.

Here are vids on possible thought starter solution ideas.

-- Andy - Seattle USA

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Redoak49

4150 posts in 2473 days


#2 posted 09-09-2019 01:23 AM

Andybb has a great solution. The closer you get to the source the better.

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Andybb

2032 posts in 1088 days


#3 posted 09-09-2019 01:39 AM

Never even thought about the CFM of my 12 gal. shop-vac as it is what it is, but I just checked because this made me curious. It’s only 75 CFM! Bandsaws make very fine dust its just that you need suction near the blade. Although if you were pulling 1000 CFM through the 4” port you’d probably be OK but that’s overkill IMO for a garage setup. I just don’t have room for a maze of 4” hoses. Everything that has a 4” outlet port gets a 6” length of 4” dia PVC pipe with a 4” diameter round piece of wood with a hole in it that fits the shop vac hose end snugly.

Truth be told, I haven’t had the cover I made for it on there for over a year. I took it off one time when changing blades and never put it back. As long as I remember to turn on the vac it does just fine just like this. I suck out anything left around the lower guides when I change blades.

-- Andy - Seattle USA

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Redoak49

4150 posts in 2473 days


#4 posted 09-09-2019 11:16 AM

We often talk about cfm but neglect suction. The dust collector has 8 -10” of suction while a vacuum is typically 60-80” of suction. This works well with smaller hoses like on a sander and this bandsaw where the pickup is close to the source.

We spend a lot of time talking about dust collectors and IMHO not enough with the dust pickups like shown above.

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LittleShaver

578 posts in 1104 days


#5 posted 09-09-2019 08:08 PM

I used my shop vac on my 14” Grizzly over the weekend. Worked adequately. Still had a small amount of dust show up on the table, but the lower case and guides were clean. About 30 feet of sawing through 3/8 material.

-- Sawdust Maker

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Andybb

2032 posts in 1088 days


#6 posted 09-09-2019 09:26 PM


I used my shop vac on my 14” Grizzly over the weekend. Worked adequately. Still had a small amount of dust show up on the table, but the lower case and guides were clean. About 30 feet of sawing through 3/8 material.

- LittleShaver


Don’t know if it’s possible to eliminate dust on the table top. I have even made a replacement plate for the table top with holes drilled in it and I still get dust on the top. I’m good with that.

-- Andy - Seattle USA

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bigJohninvegas

664 posts in 1946 days


#7 posted 09-10-2019 12:02 AM

I have the grizzly GO513×2, and a harbor freight DC. I only bother to hook it up if I am doing a lot of work. Just to cut out a bowl blank for example I don’t even bother with the DC. But the harbor freight DC works great when I do use it. I have a small shop, and to hook up the DC I must move the saw. Thats not really an issue since I got the rockler all terrain base a few months back. but for smaller projects I just vacuum the saw out with my shop vac when I’m done.
The HF web site saws the DC is 1551 cfm. If you can believe that. The saw has two ports on it, and stays clean inside when I use it. You will always have some dust on the table. I have used the shop vac with this kit I got from Lee Valley. (pictured below) to keep the table clean. Didn’t work very well.

Running with the DC does help keep the table top clean on my saw. And the inside spotless.

-- John

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farmfromkansas

125 posts in 98 days


#8 posted 09-10-2019 02:59 AM

I have a 3 hp cyclone, and even it does not do a great job on my MM 16 bandsaw. There is always sawdust in the bottom, and i added a 4” hose connection right under the table. But the cyclone does GREAT on my planer and jointer. Usually hardly notice any dust in my shop when using the DC. People look at my shop and ask “where is the sawdust?” They think I don’t build anything as it is too clean. Just have a great DC.

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LittleShaver

578 posts in 1104 days


#9 posted 09-10-2019 09:24 PM

I only added the bit about dust on the table top to indicate that it was not 100% effective. I was totally OK with it. I only hook up the shop vac when I do a lot of band sawing.

-- Sawdust Maker

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Keith Kelly

333 posts in 2148 days


#10 posted 09-10-2019 10:24 PM



Don t know if it s possible to eliminate dust on the table top. I have even made a replacement plate for the table top with holes drilled in it and I still get dust on the top. I m good with that.
- Andybb

There’s a tiny clip nested inside my Dust Collection Smoke Test video where I noticed something similar with my holey insert. I’m still trying to wrap my mind around how dust actually ends up on the bed when doing through cuts.

Clip is about 30 seconds from timestamps 11:20 – 11:50 here: https://youtu.be/tYmvwpw7s3E?t=679

-- Keith | Subscribe: https://www.youtube.com/c/KeithsTestGarage

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AndyJ1s

58 posts in 239 days


#11 posted 09-11-2019 01:44 AM

Thanks guys, appreciate the feedback. I don’t want or need 100% dust collection, and it sounds like it is not really achievable on most bandsaws anyway.

I noticed most bandsaws that have two dust collection ports, have both ports below the table, as soon as possible after the dust is made, and near the bottom of the lower wheel.

Andy

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Chad

57 posts in 1594 days


#12 posted 09-12-2019 07:01 PM

The dust made with a 12”, 14”, 18”, etc etc will be nearly identical. Don’t get caught up on that.

I have a 20” band saw and my dust collector(real one, not shop vac) is rated to 880CFM and it’s more than fine. 1000CFM seems unnecessary.

-- Wood is awesome.

View Bill_Steele's profile

Bill_Steele

559 posts in 2216 days


#13 posted 09-13-2019 07:15 PM

I have a Laguna 1412 and the original Oneida Mini-Gorilla (yellow). I’m doing exactly what you propose (no ducting and move the 5” DC hose from machine to machine) and it works fine. There is a little dust on the top of the table, but the vast majority of the dust is captured.

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AndyJ1s

58 posts in 239 days


#14 posted 09-14-2019 12:55 AM

Thanks, Bill, and everyone. You’ve given me the confidence to move forward!

Andy

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