Bandsaw question

[rvieceli]

[member=44099]Cheese[/member] do I remember correctly? I was thinking I saw a pic of your bandsaw table where the blade insert had a bunch of holes drilled in it. If that was you, do you think it helps much with the dust collection?

It's about time for me to make another one for mine and I was wondering. Thanks.

Ron

 

[jeffinsgf]

I don't know about Cheese, but my Laguna that I recently sold had those, and they did help.

 

[Cheese]

Ya Ron...I agree with Jeff, that when ripping tall material the additional holes in the saw insert seem to help considerably. In ripping tall material, the sawdust, through the help of gravity and blade tooth direction, collects at the bottom of the cut which makes for a preponderance of dust and that's where the additional holes in the insert work well. I documented the difference previously but am unable to find the photos....but it is significant.

Also understand, that I have a 4" exhaust hose attached to the band saw from a Jet cyclone and that significantly impacts the results. I'm not so sure a Festool CT dust extractor would fair as well.

 

 

[Mini Me]

A couple of things to consider when trying to get dust extraction to work on a BS.

The first is that most bandsaws have only one extraction port and with the door closed the cabinet has very little capacity to let air in and when no air can enter none can be extracted which means all the debris carried into the cabinet by the blade stays in the cabinet. I have seen some owners put a screen in the door to allow make up air into the cabinet but my solution is to put a small block of wood between the door and the cabinet and the extraction then works.

Keep in mind with the inserts that once they are covered by wood being cut then the air can't flow through a blocked hole. Allow make up air into the cabinet and the small amount of air the holes would allow is irrelevant in the great big scheme of things. 

 

[ChuckM]

https://m.youtube.com/watch?si=4HA7vBVhdl5LI3y8&v=Ut_tqnqrRww&feature=youtu.be

Cosman's approach

 

[Cheese]

Cosman's approach

Cosman's approach is similar to the original method that Delta used on my 28-303 band saw. Unfortunately, even when hooked up to a Milwaukee 8915 vac which is capable of sucking chrome off of a bumper... [scared]...the dust collection was absolutely horrific. It got to the point where I no longer bothered to attach the hose to the bandsaw because it didn't make any difference. That's what inspired me to fabricate my own dust hood fashioned after a discontinued Delta 50-239 version.

I performed this experiment about 3 years ago when I needed to rip a bunch of 4' long maple boards:
The 1st photo is almost identical to what the saw looked like after using the stock Delta set-up and ripping 6 each 4' boards.
The 2nd photo is using the fabricated dust hood with a 4" dust hose from the Jet DC-1100C and ripping 6 boards.
The 3rd photo is simply opening the band saw door after using dust extraction.

[attachimg=1]

[attachimg=2]

[attachimg=3]

 

[Mini Me]

You need a high CFM dust extractor for good results and then apply the correct duct design. Cosman along with many others does not understand that ait stalls in a closed and sealed cabinet if make up air equal to or better than the exhaust flow is not present. His approach works (I presume) because he is catching the debris before it gets into the cabinet. My approach is why bother to add extra complication when air can be let into the cabinet with a small block of wood but then I am using a Clearvue which flows a substantial amount of air. Thinking a vacuum cleaner will do the same job on a larger saw is wishful thinking at best.