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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Portable Line Boring
I'm seeking thoughts, insight, tips or tricks relating to portable line
boring. I have a backhoe, and when it was built, LBJ was president. None of the usual suspects (MSC/Enco/McMaster) even admit to the process. Several specialty suppliers have setups which seem godawful overpriced ($1500 or so and up) for what they are - and don't even start me on bore welders (5K+ and it still needs a MIG welder to run it - but I can get by with boring and sleeving, I think). One guy offers a book and plans and DVDs, also godawful overpriced ($1.5K). None to be found on sleazebay at present. I'm leaning towards kludging something together in the $500 (less if I can) and sweat realm, which may not have auto feed (if it's manual feed and the manual feed is fine enough to work, that should be OK, and cheaper). The basic structure of these things is a bar/shaft of whatever length, and bearing sets that are tack-welded (or tackwelded and screwed) to the machine. You line the bar up with either the hole (easy with cones) or the centerline of where the hole is supposed to be if it's badly worn (they mostly are) and chuck a lathe bit into one of several square holes in the bar. There's some sort of power to rotate the bar, and some sort of feed which will at least go a bit further than the spacing of the holes in the bar. You fire it up and bore as far as you can, or though one flange if it's something like bucket pivots, then set the bit in a new hole and bore more, or in the other/next flange. Good for things where the machine to be worked on is difficult to bring into the machine shop. -- Cats, coffee, chocolate...vices to live by |
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