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| milling vice restoration |
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| awemawson:
I think one of the major issues welding cast iron by any process is getting it clean. Being relatively porous it will have absorbed all sort of oily grungy stuff. Received wisdom is to bake it at quite an elevated temperature for several hours, but even then there will still be contaminants in it, and it risks distorting the casting. I've had most success using 'sifbronze' rods and oxy-acetylene with pre-heat, but of course it will show as it isn't a colour match for the iron. Perhaps it would have been feasible to bronze weld it, then clean up well and give it a light nickel plating to give a uniform appearance. |
| Andrew Wildman:
so I skimmed the vice until the insert was at the level of the surrounding metal, although wear is evident at the sliding end of the vice. I decided not to go any further on the mill. Measuring the flatness shows about 0.002" wear that I will take out by scraping. That does not sound like much but after an hour I have an aching arm and still have about 0.0005 to go! :bang: I will post pics when flat |
| Arbalist:
Looking good so far. I do hope you're not going to put Hammerite on it though unless it's the smooth stuff! |
| Andrew Wildman:
Ive got a bit of magnolia dulux left over from the kitchen! :D |
| Andrew Wildman:
I finished scraping the bottom of the vice. It is about 0.0002-0.0003 off flat which is good enough for the bottom of a general machining vice. I do like that with a few basic tools you can scrape surface to a very high geometric accuracy (much better than I have done here). all it takes is a bit of patience and a bit of elbow grease. |
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