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  1. H

    Scraping cast steel?

    Will do on the post, I do have a couple pictures, and yes, FAR western SD.
  2. H

    Scraping cast steel?

    What makes it real difficult is the fact that it has no relief ( undercut? ) in the corners of the grooves that hold the ways. Creating those could be a bit difficult. The more I think about it, the more I like the idea of a filler material of some sort. I've not applied Rulon, Turcite or...
  3. H

    Scraping cast steel?

    I don't mean to hijack this thread but I wanted to ask Mr King; if you had to scrape the machine in question, being steel slots about 7' long, would you power scrape or hand? I'm looking into a Biax for my own use besides but haven't got one yet. And the filler idea, great backup Incase...
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    Scraping cast steel?

    I happened to find that ad, that will not make a good surface plate for flatness reference due to the thin and non webbed design. I'm not sure what the original use intended was. A good surface plate is heavily webbed and usually has just three "legs" to avoid warping the plate.
  5. H

    Scraping cast steel?

    I should have noted, I own a challenge plate of similar size and it's cast iron, but was scraped very nicely flat before I purchased it.
  6. H

    Scraping cast steel?

    Look like planer marks, often left by the factory on lower flatness grade surfaces. Probably hasn't been used too hard since they're still visible. But not exactly tool room grade flatness.
  7. H

    Scraping cast steel?

    @ Richard King; I'd sure like to attend at least one of your courses, been watching your work in various videos online. I'm no professional scraper, but I'm working on it. This machine very similar to the one you described with the difference of being steel, a lot of it welded. But still has...
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    Scraping cast steel?

    Interesting timing, I too have a very likely possibility of needing to scrape steel in the near future. Searching posts and YT videos of the process and tool geometry grinding is interesting but few and far between. Not a lot of info out on this subject. My upcoming job presents itself in the...
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    Govplant Scrap Monarch = sad

    Looks a lot like cutting oil mixed with soluble coolant, regular oil and lots of rust and dust that's being floated out by the water from numerous rains. I actually worked on a lathe with very similar looking coolant in the sump in use at a local factory, and it was mixing into the headstock oil...
  10. H

    FS Kuroda NMTB50 Auto Boring and Facing Head

    I'll take second dibs on that but will need it shipped.
  11. H

    ACME Turret Lathe - worth it?

    The price is up there where a person could find a decent heavy engine lathe if patient or willing to travel a little. Turret lathes are for production runs of at least dozens or they're not worth setting up usually. I actually learned machining one off parts on a turret lathe because it was all...
  12. H

    WTB Aloris CA 2" and 2-1/2" boring bar holders

    With a 3-5/8" tool post height and a block standing 3-5/16" your ability to adjust your bar height is sure limited. Higher isn't so bad but getting it lower is going to be a challenge! But now I want one too! ( Got two shop lathes with CAs, 2 with DAs and searching for a cheap EA. )
  13. H

    WTB Aloris CA 2" and 2-1/2" boring bar holders

    I've got a 2-1/2" for my Dorian DA, it's a full load for that, can't imagine what it'd look like on a CA! Also might run into an issue trying to get your boring bar on center.
  14. H

    4140 differences

    Different companies use different designations, but can mean the same thing. You have to get a spec sheet to get exact data as even by the same manufacturer lot to lot differences of hardness and even element content will vary. PH = Pre Hard QT = Quenched &Tempered HT = Heat Treated SR =...
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    How to 2-1/2" 3 LH Acme, tap??

    Lots of good info and links being provided here, even if this job falls through I'll be better prepared for Acme threads later! Thanks for all of your efforts, it is appreciated!
  16. H

    How to 2-1/2" 3 LH Acme, tap??

    Go for it cole, I haven't seen the parts arrive yet, so who knows..
  17. H

    How to 2-1/2" 3 LH Acme, tap??

    I tend to keep my machinist handbook..uh..... handy, used it when I ground my other acme tools. I hadn't used the three wire on acme yet, interesting. Thanks for the chart.
  18. H

    How to 2-1/2" 3 LH Acme, tap??

    Thanks michiganbuck, good pointers.
  19. H

    How to 2-1/2" 3 LH Acme, tap??

    Great advice guys, thanks! I've given an estimate to the customer which will include the cost of a " progressive"?? Tap ( rougher and finisher on the same tool) ... just in case. This likely won't be the only time this job comes to me if I do it this time. Apparently they can only currently...
  20. H

    How to 2-1/2" 3 LH Acme, tap??

    Indeed I do have a surface grinder, and already made one HSS tool to use for a thread standard,(I have made a lot of them) but need to make another tool out of smaller bit material for the boring bar I will have to use if I go that route.
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