Well I drilled out the holes after carefully lining up with the existing holes and using the hardened jaw as a guide.
Imagine my surprise when it was a mile out! The jaw only fits one way up or it hangs over the edge. WTF? So I double checked the OEM jaw:
OMG! I can hardly believe it. Thats almost a whole millimetre out in just 14mm. What on earth is going on. I'd expect an expensive hardened steel jaw to test the accuracy of my measurements. This throws some of the other stuff into harsh light. The machined step in the jaw faces, the fact that the opposing jaws are nowhere near 180 degrees apart, the anvil not being parallel to the base etc. etc. I had wanted to defend this amazing vice as being the best of British but this particular one is surprisingly crude.
I started to linish the anvil flat but I didn't want to take too much material off. It was about 1-2mm off being parallel with the base so I did most of it and just left it at a slight angle to parallel. I may revisit that.
Still, it's a tool and I can't wait to try it. I'll probably make some HDPE jaws up out of an old chopping board or maybe mahogany. I can't see myself throwing any more money at this though, will be interesting to see how much the new jaws cost.
But hey, it's starting to look nice!
Now I just need to decide if I want to risk another braze to fill up the cracked off back cap retaining screw. I say risk because I don't want to heat up the whole thing just for that small braze right on the end. On the other hand, I do know it's possible to distort and crack castings if you're not careful, plus I'd have to machine off any excess. Maybe I could TIG it using those brass rods??
...
Incredibly, TIG brazing seemed to work! I certainly wouldn't be so casual with anything life threatening but I thought I'd have a go.
From stone cold, 60 amps, AC, with +ve bias and -ve, seemed to go on ok but spatter.
Went to DC which was virtually the same though I think I cranked the amps up a bit. Again lots of noise, spatter and the silicon rod really would boil off in an instant. But it stuck fast! I even managed to braze it with a bolt in situ so I didn't have to muck about trying to find a hole etc. Was a right pig to get it out but it did screw out eventually.
Tidied up with a hand file. Where the TIG hit the cast iron, it went glass hard. Had to dremel a couple of spots off with a stone when I flattened it back. Drilled and tapped the back cap and all went together ok. The grub screws are only there to prevent the front jaw from being pushed into the vice, which is how the postie managed to break it when he dropped it.
Paint prep.
Last look at the repair piece.
And we're nearly there....
Just a pair of jaws to knock up.
S.