Picture of Cardboard tube legs
This instructable is going to show you how to make use of old cardboard tubes to make a structure that can be disassembled, in my case it was for a coffee table for a friend.
Materials needed for this are as follows:

-Measuring tape
-dremel with diamond cutting disc
-metal file 
-saw to cut small wood stock
-Carriage bolts or hex bolts 
-T nuts
-drill with drill bits 
-cardboard tubes

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Step 1: Planning your cuts

Picture of Planning your cuts
Measure your tube and find out where you want to make your first cuts to use as a pattern. 
Depending on the thickness of the material you are going to be using, helps determine your cut depth and size. 
You can use what ever size wood or stock for the lower cut on the tube. This cut must be matching on the other side of the tube as it will be holding stock.

Step 2: Cut and drill

Picture of Cut and drill
After cutting all 4 legs do a dry fit of everything, legs tabletop and inner wood threw eyehole. Minor adjustments may be needed. 
Use a metal file and some sandpaper to ensure the wood for the eyehole fits snug but removable.
Drill a whole the size of the carriage bolts that starts about 1" from the corner of the tabletop and goes threw to the wood into the wood in the  eyehole. 
Countersink the hole that was drilled on the tabletop of desired.
Remove wood from eyehole and complete the drill if needed.  
Attach T nut on the underside of the wood for the eyehole.
Test out the fit once again except this time with the carriage bolts in.
A quick drawing demonstrates a sectional of how the cardboard tube (leg) attaches to the tabletop surface.
By putting a T nut  on the bottom of the wood stock in the eyehole, allows for a clamp like bond when the hex bolt is threaded from the top of the tabletop surface.
pheenix423 years ago
Oh my...we send tubes like this off to the recycler by the dozens where I work at! Thanks for the upload!
waterboy8993 years ago
looks fab! just an idea, you could use a dowel for the eye piece then you only need to drill a hole in the legs, i will try and let you know.
chipper353 years ago
This is exceedingly clever!