A simple design original conceived for making loco lubricator oil tanks, cab steps etc. Using a selection of "V" blades across the 4" bed, the folder can produce the 4 sides of a box in material up to around 16 SWG.
In operation, the jig is secured in a press or bench vice (min. 3 3/4" opening). The designer suggests a suitable structure for a press and gives details for using the folder to punch holes.
The kit includes steel, fasteners and Oilite bushes to ensure contact of the V's. Whilst the folder can be entirely machined on your lathe, a vertical miller would be advantageous.