Dust Collection

  • Advertise with us

« back to Jigs & Fixtures forum

Forum topic by MikeDe posted 01-26-2013 04:08 PM 1131 views 0 times favorited 4 replies Add to Favorites Watch
View MikeDe's profile


49 posts in 3173 days

01-26-2013 04:08 PM

Topic tags/keywords: question tip

I am building a dust collection system for my
table saw. I have it just about complete, all
I have left to do is to build a blade guard with
a dust port. I can build one with a 3 inch or 4 inch
port in it and I would like some feedback on witch
would be the best size.
The system starts at a 6 inch line from the cyclone
and ends with a 4 inch line at the saw.
It will have a 3 foot piece of flex at the end that will
attach to the blade guard. This 3 foot piece can be
either 3 or 4 inch diameter. I have been told that the
3 inch hose would have more velocity at the end than
the 4 inch and wound be better for picking up the
sawdust that comes up the back side of the blade.
What do you guys think?

4 replies so far

View JesseTutt's profile


854 posts in 2592 days

#1 posted 01-26-2013 04:11 PM

I don’t have a reason to back this up but I would go with the 3”.

-- Jesse, Saint Louis, Missouri

View CrazeeTxn's profile


151 posts in 2432 days

#2 posted 01-26-2013 04:19 PM

How would 4” affect the guards ability to actually work? That would be one good sized guard to accomodate a 4” hole. How about a 2 1/2” at the guard and Y from the 4” to that?

View Fred Hargis's profile

Fred Hargis

5693 posts in 2975 days

#3 posted 01-26-2013 05:08 PM

I’ve had the 4” Shark Gaurd, and changed it to an Excalibur overarm that has a 3” pickup. On my system, the 4” Shark was much better at catching the dust than the 3” Excalibur. Some of that would be attributed to the basket design, I think, but I suspect most of it is just the better air flow through the 4”. They were both hooked to a 6” line that was powered by a 5HP cyclone. That said, the performance of the 3” Excalibur isn’t terrible….just not as good as the 4” Shark.

-- Our village hasn't lost it's idiot, he was elected to congress.

View AandCstyle's profile


3219 posts in 2739 days

#4 posted 01-27-2013 01:54 AM

The area of your 6” trunk line is about 28 square inches. The area of 2 4” feeds is about 25 square inches. The 4” line will cause less turbulence, hence greater air flow. I have a 6” trunk to my TS with 6” all the way to the dust port where it is reduced to 4” and a 5” flex tube to a Shard Guard with a reducer to 4”. So to answer your question, I would use 4” to the blade guard. HTH

-- Art

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics