In the late "70s I saw a set of plans for a cider press in the Canadian Harrowsmith magazine.
They used hard wood possibly oak to build the cylinder that the mash would fall into.
I basically copied the plans but used stainless steel to build most of it.
The frame is made out of welded 4" steel channel. We have a front suspension out of a VW Karmann Ghia to make it mobile.
We built a stainless funnel that we pour a 20L / 5 gallon bucket of apples in at a time.
I have a 4X12” apple wood cylinder that we turned on a lathe then screwed many stainless screws in with 1/2" sticking out for the chopper.
The spinning chopper has a 1” steel shaft through the middle and pillow block bearing on each end.
The chopper is powered by a 120 vac 1 hp electric motor with a 3 to 1 belt drive.
The apples press against the spinning stainless screws and are chopped up and falls into the stainless cylinder- the cylinder holds 9 or 10 buckets of apples each pressing. It takes less than 20 minutes to do a pressing.
We made a heavy duty pressure board made out of many 2x6x30" apple wood boards that is the diameter of the 30 inches stainless cylinder and 5 inches thick. Stainless steel bolts and nuts hold it together. This is used to press the mash using a 4 ton Jackall jack - it has lots of stroke and the pulp comes out damp.
We get 15+ gallons per pressing depending on the apple. Gravenstein apples around here are the juiciest.
When dumping the dry mash into the wheelbarrow to be dumped in the compost pile, we have to pound the pressure board out after each pressing.
We get our apples from a lot of the old homesteads in our little valley, the people just want the apples gone before the bears come around.
After picking the apples we wash then put them into plastic buckets.
It takes two or more people to do the pressing .
I do the pressing and my pal keeps the buckets coming. We freeze our share of the juice and my pal's family process theirs.
500 gallons per year with 1600 gallons on our best year.
We call the machine the Immaculate Contraception
cheers
Hank