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    ZZ, 3am collets & Bokum boring heads

    Ken wrote: "Here are the sizes I have: ..." With one exception, that's what I have, too, with the same duplicates for the most part. Must be a pattern there somewhere, like tap drill sizes ... I should add 21/32nds and 23/32nds to my wish list; Ames or Hardinge 3AM size. Best regards, George
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    ZZ, 3am collets & Bokum boring heads

    Hello Gewehr 98 - Can you list the sizes of the Ames/Hardinge 3AM collets ? I'm trying to round out a set and so I'm looking for the 9/32nds, 11/32nds, 13/32nds and 11/16ths sizes. I've got some extras, too: 3/16ths & 3/8ths (Hardinge), 7/16ths (Ames), and 1/2, 9/16ths, & 5/8ths (no name on...
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    South Bend lathe repair

    I did also check the alignment of the tailstock spindle by sliding the tailstock along the ways underneath the dial indicator - it's aligned within half a mil in both elevation and plan views and along the full two inch extension of the spindle.
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    South Bend lathe repair

    I was mentally all prepared to have to put shim stock between the top and bottom pieces of the tailstock and was starting to think a couple of pieces of paper would do when I came up with that 0.003 inch removed figure. Looks really bad for the headstock alignment. The headstock doesn't come...
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    South Bend lathe repair

    The crack in the headstock is near the front of the headstock, right behind its forward bearing on the bed and next to where the front clamp is located, as though someone had run the saddle into the headstock and pushed real hard against the back end of the headstock casting where the spindle...
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    South Bend lathe repair

    I have a nagging feeling that the lathe's spindle is aligned in a downhill direction; that would be an alternative to my first theory that the dial indicator setup was sagging. It was indicating the spindle of the tailstock 10 mils high; I can't tell you how many times I pushed down on that...
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    South Bend lathe repair

    It's never that simple. Remember, when the shaper's compound is tipped over at 45 degrees to move the tool parallel to the surface being machined, there are only two ways to adjust the depth of cut: (1) move the table over; or (2) Raise the table. (2) is a lot more work than (1), so over it...
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    South Bend lathe repair

    Back in about 1966, I bought a clapped-out South Bend 7" shaper. It was embarrassing to find out that if I snugged up the ram's gibs, it would only move about an inch each way before sticking. So I bit the bullet and started hand scraping. In the ensuing 40 years, the ram has never touched...
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    Whats a die sinker?

    I'm in the process of bringing a Bickett (Cincinnati) die sinker back to life. Try a Google search on [Bickett +"die sinker"] and you'll see some threads that I started many years ago on this subject ... Here's one previously described in this forum: http://www.isitcrunchy.com/bickett.htm I...
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    Remarkable repair of ship's main shaft

    Way back when I taught in the metallurgy department at Drexel University in Philadelphia, I taught a graduate course in engineering design. Each student picked a problem of his own choosing, developed a mathematical model of the problem, and then found an optimal solution. One of the students...
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    My grandpappy ran a rail mill ...

    We went back to Joliet about ten days ago and found the place from which the first two images were made. The only thing left there is the old office building, which is now the center of a scrap metal operation. Met the owner, but he had never heard of McKenna and did not recall seeing any...
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    Mug Shots of Unknown Lathe which had one heck of a CRASH

    Hmmmm. There are screws visible behind the back of the chuck. Presumably these can be undone with an impact-type screwdriver (Sears Craftsman ...). That should allow the front of the chuck to be pried off, followed by undoing the hidden screws that hold the chuck's backing plate onto the...
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    Metal planer ad in Lancaster Farming (PA - USA)

    Addicts alert: The following ad appeared in Saturday's Lancaster Farming: "Old metal planer 2' by 72 inch bed. No motor $200 obo. Dauphin Co[unty] 717-534-1495." Lancaster Farming is published weekly in Lancaster, PA USA and contains a great many auction announcements and advertisements for...
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    Crankshaft machining at Vickers

    Asquith dug up some nifty photographs of machining on a grand scale. Alas, what I have to offer is only a remembered scene ... About 1986 or 1987 I was looking for tools and instruments (for the new metallurgical consulting business I was starting) and attended the final auction at the...
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    My grandpappy ran a rail mill ...

    On the subject or rerolling rails ... In the mid-nineteen-fifties, worn rails were being rolled into light rails successfully, because the total reduction in area (which is inversely proportional to the reduction in weight per yard) was large enough to cause the grain structure to recrystallize...
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    My grandpappy ran a rail mill ...

    Asquith corrected my grandfather's spelling, and so I fixed it here in George Langford, Sr.'s account of the English McKenna Company's misadventures: http://www.georgesbasement.com/McKennaProcessCo/HTMLfiles/GeorgeLangfordTheMcKennaCompany.htm That disaster effectively squandered the investors'...
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    My grandpappy ran a rail mill ...

    Mixdenny asked about recalescence ... That's due to a change in crystal structure - from face-centered cubic austenite (the high-temperature form of iron & steel) to ferrite plus iron carbide (the low-temperature form). Ferrite is body-centered cubic and cementite has a complex cystal...
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    My grandpappy ran a rail mill ...

    Here's the complete history: http://www.georgesbasement.com/McKennaProcessCo.htm from beginning to end. I never saw the place myself, but my brother did, and my Dad worked at his Father's shoulder for a bunch of years. There's a section on the English McKenna Process Company, but I haven't...
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    bauch&lomb #26a1915

    Not sure ... I have a couple of B&L four-caster stools that weigh about forty pounds each. They came with the large metallographs such as the Balphot and the Research Metallograph. Mine have had their tops recovered - with leather - and the rubber pads replaced. They're nice 'cuz you can sit...
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    Wheeler lathe in Ken Cope's book

    Jim - You've solved the puzzle - in spite of all my heaviest & out-of-the-box thinking, it never ocurred to me to change that gear ! Also 'splains the nearly 1:1 ratio - the shaft in back is a lead screw, and the range of thread pitches envisioned in the middle of the 19th Century could very...
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