LumberJocks

Unisaw MDF extension wing

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by Fallon posted 11-25-2009 06:40 PM 6729 views 0 times favorited 7 replies Add to Favorites Watch
View Fallon's profile

Fallon

86 posts in 2595 days


11-25-2009 06:40 PM

The used Unisaw I recently got has a pretty tore up 1” laminated MDF extension wing (54” fence 47 or 48” of MDF) on it. I can only track down 3/4” MDF locally. Should I just grab the 3/4” and adjust the brackets & shim or hold out and special order the 1”?


7 replies so far

View BlankMan's profile

BlankMan

1488 posts in 2820 days


#1 posted 11-25-2009 07:03 PM

Extension wing or extension table on the right? When I made my extension table to replace the one that came with the saw I used particle board and laminated two layers together in a ribbed pattern to give it added stiffness. The original table as supplied by Delta warped over time, might have been due to the router I had it mounted on it so when I built this one I wanted to insure that would not happen again. I also framed it with angle iron so I have one rock solid level table.

You can see the building process here.

-- -Curt, Milwaukee, WI

View Ger21's profile

Ger21

1047 posts in 2598 days


#2 posted 11-26-2009 09:15 AM

If you use 3/4”. it probably will sag after awhile. But you could reinforce it like Curt did. (Really nice job, Curt). I’m getting ready to build a new one, and I’m trying to build a 3” thick torsion box, as I also use mine as a router table, and don’t want it to sag at all. Still in the design phase, though.

-- Gerry, http://www.thecncwoodworker.com/index.html http://www.jointcam.com

View Fallon's profile

Fallon

86 posts in 2595 days


#3 posted 11-26-2009 09:55 PM

Nice project & photos, gives me some good ideas. I will probably just grab 3/4” and laminate/rib then.

Anybody happen to know the size & thread pitch on the threaded holes on the back of the cast iron table?

View BlankMan's profile

BlankMan

1488 posts in 2820 days


#4 posted 11-26-2009 10:06 PM

I think they’re 7/16-14, at least on mine.

-- -Curt, Milwaukee, WI

View BlankMan's profile

BlankMan

1488 posts in 2820 days


#5 posted 11-26-2009 10:56 PM

I thought about making my extension table a torsion box, my outfeed table is, but then it would be thicker. You’d have to provide a recessed opening, from the bottom up for the router insert and I thought that then might compromise the torsion box box design a bit because the principle is based on having a continuous top and bottom sheets. But having a hole in the top and bottom may not effect it much due to the continuous sheet around the openings. That’s why I chose the two layer laminate and the angle iron framing. As long as the rails of the torsion box were right under the rabbit that supports the insert it probably would work well.

And also where my extension table bolts to the UniSaw if the table where say 3-4” thick have to figure out how to bolt it up to the UniSaw because the bolts are about an inch from the top. That’s why there’s those fancy routed U-shaped reliefs on the edge of the table, for the bolt heads, and the milled opens in the angle iron at that location for clearance for the bolt heads.

-- -Curt, Milwaukee, WI

View tooldad's profile

tooldad

660 posts in 3182 days


#6 posted 11-26-2009 11:09 PM

I use either 3/4 or 5/8 mdf, whatever I have laying around with a torsion box made by ripping scrap plywood into 1×2 strips. If you don’t want to move brackets, laminate two 1/2” pieces together. But I have had no problems with the torsion box and 5/8” mdf. The only problems I have had is the kids tend to lift up on the end to clean out the saw since it is an older saw with no dust collection, we have to move it to clean it out every other day or weekly.

View End_Grain's profile

End_Grain

95 posts in 2604 days


#7 posted 11-27-2009 11:25 PM

Or, if all your looking for is the extension wing, this will really save yourself a bunch of time and won’t ever get ripped up. I ordered one, and it fit perfectly, no shims. Just bolted it up and tightened it down. It was the cheapest I could find. Hardware comes with wing.

cast iron wing extension

-- My greatest fear is that when I die, my wife will sell all my stuff for what I told her I bought it for.

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

HomeRefurbers.com