A do-it-yourself guide from Edinburgh Woodturning - suppliers of high quality legs and bun feet for Sofas, chairs, beds, footstools and most furniture. www.edinburghwoodturning.com
T-NUTS
5) Correctly fitted legs will look like this one in the
cutaway section in photo 5.
The T-Nut must be at the TOP of the wooden rail and the leg is screwed in from below.
If the T-Nut is able to move in the oversized hole, then the leg will always align with the wooden rail and it will be vertical.
To achieve maximum strength, an 8 mm dowel screw only needs to enter the T-Nut by about 10 mm.
The dowel does not need to protrude out from the top of the T-Nut.