How To Bend Sheet Metal For Ductwork

Simple sheet metal bender using a hand roller clamps and plywood.

How to bend sheet metal for ductwork. Cross braking is done using benders like this one from roto die. Monkeys spinning monkeys by kevin macleod. Cut a piece of foil tape to length. Here s bob s trick for taping a seam on a pipe that s installed close to the subfloor.

To remove irregularity or improve uneven bends place a hardwood piece lengthwise along the bend and hit the bend with increased strength using a heavy duty hammer or mallet. A second bend is made across this initial one leaving an x impression on the sheet. V notches are the bending notches on straight duct on slip drive. If the ducts are going to be concealed all seams need to be taped or caulked.

In some cases as with thicker sheet of metal you may need to use a sheet metal brake to apply your bend. Slide the backing up and over the pipe. To form the operator marks the bend line on the sheet as a guide then lines it up with punch tip and performs a shallow bend.