Bandsaw

[pjwillms]

Have any body got Idea the doors on the bandsaw have gaps around them wood it be ok to put foam strips around them to stop dust coming out .

 

[kinverkid]

I put draught excluder which maybe similar around the doors of my record bandsaw years ago with no problems.

 

[Terry - Somerset]

Have any body got Idea the doors on the bandsaw have gaps around them wood it be ok to put foam strips around them to stop dust coming out .

I have done precisely that - not so much to stop the dust coming out, but to try and get the dust extraction system to work more efficiently.

There is no point in having a large dust extractor, which uses a lot of energy making a lot of noise, to simply suck fresh air into the bandsaw and then expel it (dust free) through the filter.

 

[pjwillms]

I will do that on my record bandsaws Ty v m

 

[Sideways]

If you are going to suck air out of a hole 3" , 4" (?) diameter on the back of the box, you need holes and gaps that add up to the same area everywhere else to let the air in otherwise you are choking the airflow.
Just worth bearing in mind.
Assume you are using a high volume extractor not a shop vac. A vac wil be near useless unless you focus all its suction where the blade comes through the table.

 

[pjwillms]

No just trying to stop som of the dust coming out there is quite a lot around the doors top and bottom thvm for the reply

 

[Orraloon]

Without extraction the lower cabinet will fill with sawdust. The blade then carries the dust up and out plus up into the top wheel cabinet and even down again to the table. Sealing around the doors will not stop the blade spreading the dust around.
As Sideways has pointed out with extraction going then the air has to get in for the extraction to work. Its air flow that carries the dust away. More the merrier. Same goes with extraction on any machine.
Regards
John

 

[Mike Fletcher]

There was a post not long ago about making a dust extraction port that fits just opposite the lower guide bearings. Mine takes most of the dust.

 

[kinverkid]

I agree with what Sideways is saying. The volume of air coming in from the various gaps around the bandsaw needs to be at least equal to the volume of air extracted. If you have dust coming out of the doors then there is either not enough negative vacuum or the extraction is not enough and there is a build-up of dust inside the machine. I have had this set-up on my machine for years now. My extraction system is 63mm. Both the top and bottom doors on my bandsaw are sealed. I must have the ratio of air-in to air-out correct-ish because, although I do get some dust building up inside, it's not much and does not allow much to leave the machine other than the extractor. Recently, I have added the 3D printed curves inside which help stop any build-up in the corners. It's not a big problem and probably a little OTT but it does work to a degree. With only a 63mm or smaller system, the suggested solution by Mike above could, possibly be better by taking the dust away more or less from the source.

 

[Limey Lurker]

I have done precisely that - not so much to stop the dust coming out, but to try and get the dust extraction system to work more efficiently.

There is no point in having a large dust extractor, which uses a lot of energy making a lot of noise, to simply suck fresh air into the bandsaw and then expel it (dust free) through the filter.

That is exactly what should happen: the air through the filter should be as dust-free as possible!

 

[Terry - Somerset]

That is exactly what should happen: the air through the filter should be as dust-free as possible!

Probably didn't make it clear - the airflow needs to be around the blade where the dust is created, not sucked in around ill fitting doors.