At last I have found a way of making a frame saw where the metal blade holders that hold the saw blade can be rotated. I thought about getting them manufactured, but that would be expensive. Problem solved when I bought very large split pins.
The saw can be used with any band-saw or other types of blade. Cross cutting is easy and bow-saw blades for green wood can be used. With rip sawing just release the tension on the frame and turn the blade 90 degrees around.
Normally I would use 2 hands when ripping, but the camera was in my right hand.
The pins are 10mm diameter 8cm total length. If using very wide blades then a hacksaw will have to be run down the split to widen the gap. I have to do a bit of work on the pins before use, like cutting each side to equal length and drilling a hole through them. I can tell you that drilling the hole is not easy, just as locating the centre punch on round stock accurately is not easy.
Above is the detail of the joint, a simple mortice and tenon, which holds the cross bar in place.
What about blades? I hear you ask. Old band-saw blades are great, they do not need to be new, so ask any woodworker who uses one to save their old blades for you. They are easy to cut; I just fold them where I want the cut and hit the bend with a hammer on an anvil and unbend the blade, and that's it. Remember to hammer the cut flat, and give it a few strokes with a file. To make a hole use a centre punch and then drill, the metal will be soft enough.
Most band-saw blades are designed for dry wood, so if you are cutting green wood buy some bow saw blades designed for green wood.
Later in the year I will be selling these wholesale, in proper packaging, with full instructions.
Email me if you are interested.