Fabricating and installing a 300 mm riser block

Not exactly home workshop equipment but an interesting insight in to how the 300 mm high block was made (out of 20 mm plate), welded and skimmed.... https://www.youtube.com/watch?v=roMzviZ4p6I

That's a heck of a parting off tool!

Part II (the installation) to follow soon, I believe.

Ches

Having worked similar machines it gives me a feeling of how small my little machines are, what I am missing, and what we used to do to to arrive at a finnished job.

David

Kurt has some wonderful older machines that will soon be a regular part of his channel .He won't please the purists but his end results are what matter . The KW facing borer did a fine job of facing the riser .

Sean

David, Yes, I occasionally worked on larger machines in my youth...the big mills I was fine with, but the big lathes I was very wary off.

Sean, Kurt seems one of these motivated people that gets things done. I'm curious to see where/how the block fits into the Borer. I imagine the original designers of the Borer did their stress calcs on all bolted interfaces...I hope the riser lasts the course...it certainly looks substantial.

Ches.

I worked on a huge old flatbed lathe to turn recceses in gearbox covers for a Dosco heading mining machine. The plates were 5 feet long about 2 feet wide and 1/2 inch thick with three overlapping recesses in one side about a 1/4 inch deep The lathe had riser blocks about 18 inch too swing the plate the center recess was ok ish but the outer recesses were a bit hairy swinging a 5 foot plate in an offsett jig bolted to a faceplate like a large blade. There was a back guard with a small radial upstand but there was no front cover. At full swing it had a circumference of about 8 feet swing. I also had to make a sine table with a 3 feet square top and bottom plates 2 inch thick plates, to machine a door for a nuclear reactor made from 1 inch thick stainless steel plate fabrication hollow and filled with lead. It weighed about one and a half tonne.

David

Edited By David George 1 on 30/07/2022 09:24:16

swinging a 5 foot plate

That must have been quite a thing. Was there a counterweight, or was the cutting speed low enough that one wasn't needed?

Ches