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I'm leaving the 200 pound anvil, partly because it's too big, but mostly because the working face is damaged all along one edge.
“Quick Indexing” sounds more accurate.@RUSH55 Wow! Missed that. So these are not “ratcheting” vises as
Much as they are “quick indexing” You pull out the meatball and can place the dynamic anywhere you need it the release the meatball and have a conventional vise. There is a screw and a spring but looks like the PO welded that making it only work conventionally. I have not seen many 7 series Athols so can’t say that it was a common failure point but looks like you still have a great vise there (and a cool story).
@PIP WOW! What does that thing weigh?
I've always been fascinated by the rear dynamic jaw and adjustable gibs on some German and Polish vises. This FPU popped up for sale near me but with an asking price of $450 it seems the seller is engaging in a little wishful thinking!@KT40 Just looking again at your Tiny German vise. Polish and German vises can all claim the oddity of having a backward moving dynamic jaw (Heuer, and FPU come to mind). Pretty neat to see.
This repair video is similar to what I’ve been thinking to do.
Like the guy doing the repair, I’m not really sure what the screw is made of. Cast steel?
Would be good to do like he did and use a dis-similar metal welding rod if making a weld repair. Probably going to make a new meatball out of a chunk of 2-1/2” round-stock. Not sure if I want to bore a hole and tap it or tap threads on the outside of the shaft and give the meatball the female end.(?) Might be stronger.
I think you’re right about “leaded” carbon steel. It seems soft, yet flexible. Hard to say how well it would hold conventional threads.Hard to say what the screw is made from. If the builders were top end it would probably be 4340 around RC40. I'd bet it's something more like a leaded medium carbon steel like 10L45 so they could machine it as fast as possible and it had enough strength to last a decade or two of daily use. If it's a leaded steel it will not weld. If it's a higher carbon alloy that is not leaded it will weld fine using a preheat and any low hydrogen process (any 70 series MIG wire is low hydrogen BTW).
Keep in mind all these bench vises were mass produced commodity goods. They were often built beefy with the cheapest available materials. We like to think of these old things as fantastic and overbuilt, but they weren't. They were built to sell just like everything else.