Blow Through Vs Pull Through Top Hat

[dwall174]

Does it make any difference if the dust/air is blown into the Thien baffle vs being pulled through it like a normal set-up?

I recently picked up a DeWalt DW735X planer & it has a built-in chip exhaust system that blows the chips out of a port on the rear of the machine. The planer comes with an adapter to connect it to a 4" hose, using a hand-held anemometer I'm getting about 225CFM of air flow out of the 4' port.

I've seen several YouTube videos of people with the same type of planer using a trash can style Thien baffle to collect the chips with just a small filter bag on the outlet.

Would a top hat style Thien baffle work with just the 225CFM from the planner?

Doug

[dwall174]

Well 50 views over 3-weeks & no replies ???
I guess I'm going to have to figure this one out myself!

Doug

[Lance]

I guess I'm going to have to figure this one out myself!

I would guess that no one here has tried that exact set-up, so nobody wanted to give you an answer.  Some of the questions I have had, have been the same way. I was asking about somethings that no one has tried.  So, I am working on trying it myself...

The best thing I can say is give it a try and post up your results.  It may help the next person that is hoping for answers.

Lance

[dwall174]

I guess I'm going to have to figure this one out myself!

I would guess that no one here has tried that exact set-up, so nobody wanted to give you an answer.

I just found an old post here on the same topic after doing another search. It's about 4 years old, but I brought it back up to see if I get any response.

Doug

[jgt1942]

Just my thoughts, but I expect the pull to be better. The question I have for you is what type of waste will the DeWalt DW735X planer create. If you are using the long knives it will produce long strings and often the strings will block the circular cutout. If you have a helix (shelix) head then you should be OK. I would also guess that the DeWalt to have consider less power than an impeller connected to the Thien and pulling the air through.

A couple of years ago I had the Harvey G700 dust collector and my Hammer A31 planner/joiner had the knives at that time and I no longer had my Thien. I spent more time cleaning out the blockage in the G700 than I did running boards through the A31. I was so disappointed in the performance I sold the G700. Since then I have upgraded my A31 with a Shelix head (love it).

I recently got a used ClearVue Cyclone and in the final stages of restoring it. I hope to have it working in the next two weeks.
Also at the same time, I will be building a Thien for my friend's workshop.

[dwall174]

The question I have for you is what type of waste will the DeWalt DW735X planer create. If you are using the long knives it will produce long strings and often the strings will block the circular cutout.

I've read that the impeller in the blower of the DeWalt 735 will somewhat chop-up the long strings?
https://www.youtube.com/watch?v=WTFdwDLNGfA

For now, I'll just be using the straight knifes but I do plan to upgrade to the helix-style head at some point.
I'm also thinking about making the circular cutout slightly wider which I understand lowers the efficiency, but it should help with the clogs.   

The majority of my planning will on narrow width boards so the strings should be minimal length.

Doug

[bbain]

I have had a push through thien top hat in operation on a 735 planer for almost 10 years.  Works great, doesn't clog, if you over fill the bin it will shoot out chips all over the shop. (guess how I found that out) Mine is now vented outdoors in an attempt to keep more dust out of the air.

Don't over think it.  Build it and enjoy worry free chip collection.

[dwall174]

I have had a push through thien top hat in operation on a 735 planer for almost 10 years.  Works great, doesn't clog,

Thanks for the reply!

Don't over think it.

Where's the fun in that. ;D

What's your top hat's diameter & what size hose are you using from the 735 to the Thien Baffle.

Doug

[bbain]

Using 4" hose, with a 90 right on the outlet of the planer so the hose is out of the way of the outfeed table.

Diameter is the same as a rubbermaid brute 20gal trash can that I am using as a waste bin.

[dwall174]

Using 4" hose, with a 90 right on the outlet of the planer.

Diameter is the same as a rubbermaid brute 20gal trash can.

Thanks!
That's about the size I was thinking about making mine. I used some kerf-Board that's used for concrete forms to make the cylinder, I was just unsure of the inlet & out sizes. Mine will also sit on top of a metal 20gal. trash can.

Doug