Preda Machine duct beader is designed and built in Anhui, China.  

This machine is used to form beads on flat sheet metal for stiffening ductwork and fittings

The machine has a 1.2mm*1300mm capacity.  

Beading rolls are designed for easy replacement if damaged and

bead rolls are etched into the bead roll shaft for easy alignment.

Duct beading is a much faster practice as compared to the original cross breaking method.  

A Duct Beader machine is a fairly simple machine where in you feed flat sheet metal into the machine and the machine forms 5 beads on 1300mm width sheet or 7 beads on 2000mm!!(depending on the machine model).

Tooling of Preda duct beader, if broken or damaged, is replaceable without replacing an entire machine.

You can adjust the beading depth by rolling up/ down of beading rollers.

(A convenient handwheel raises or lowers, the top roll assembly to set depth of bead. The top and bottom rollers are kept parallel with adjustable screw.)

Preda duct beader is using good quality Chinese local motor; high precision needle-type bearings (which is self-manufactured by Preda Machine);  turned, ground, and polished steel forming rolls and roll shafts!

Specification,