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Type: Posts; User: Conrad Hoffman

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  1. Depending on what you need to make, a 5900 might...

    Depending on what you need to make, a 5900 might not only be a starter lathe, but a forever lathe. We had similar where I used to work and they survived a lot of abuse and made a lot of parts.
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    Another thought occurs- we tend to think in terms...

    Another thought occurs- we tend to think in terms of college or trade school or experience, followed by some job or jobs you do forever. The fact is, some of us change over the years. When I was...
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    I think it's even more important to consider the...

    I think it's even more important to consider the trades today, as the ROI on college ain't what it used to be. Up front debt is a real killer of dreams and happiness.
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    Cool oiler with the twist cover. Never seen that.

    Cool oiler with the twist cover. Never seen that.
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    Don't know a thing about these, but it's really...

    Don't know a thing about these, but it's really fantastic. I notice there are no oilers on the headstock bearings. Could it be rolling bearings, or just a hidden wick somewhere? I know I don't have...
  6. BTW, what do people do to batteries to kill 'em?...

    BTW, what do people do to batteries to kill 'em? I live in a northern climate and always get ten years plus from batteries before they get even slightly bad. Keep 'em topped up, even low maintenance...
  7. Stub drills are great if you can use them. What...

    Stub drills are great if you can use them. What size are we talking? I rarely have trouble with number drills, but as you go larger chatter and weirdness can happen. Best I've found is not to baby...
  8. Any MSO (mill shaped object), a cheap BS-0...

    Any MSO (mill shaped object), a cheap BS-0 dividing head and a gear cutter is the way to go at home.
  9. Odds are, unless it's beat, the surface plate is...

    Odds are, unless it's beat, the surface plate is pretty good and the straightedge isn't. Not surprising since it was milled. You need to determine that the surface plate is good, then scrape the...
  10. People have been trying to rejuvenate sulfated...

    People have been trying to rejuvenate sulfated batteries for a long time. If anything really worked, we'd know about it by now. Some techniques may get a small amount of capacity back, but IMO it's a...
  11. Probably obscure in this case, but is the pin to...

    Probably obscure in this case, but is the pin to be centered in relation to the ID or OD? Is there a concentricity spec (yeah, worst thing to use with GD&T, but you know what I mean.)
  12. If you have a microscope and can get a Vickers...

    If you have a microscope and can get a Vickers indenter, it's easy to apply the necessary force and calculate the hardness. If you have an Accufinish tool grinder or some other precise way to lap,...
  13. I hate to admit it, but we bought some of the...

    I hate to admit it, but we bought some of the cheap-ass $5 chucks on eBay and they proved to be surprisingly good. Still, you can't go wrong with the little Albrecht.
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    All the nuts for things like that I've seen have...

    All the nuts for things like that I've seen have been molded. I can't imagine how a tap could work. It would be more like broaching with a twist!
  15. A decent HLV EM isn't going to come cheap. I'd...

    A decent HLV EM isn't going to come cheap. I'd think any decent SB or Logan, set up with transposing gears, would do just fine. Spend what you saved on chucks and tooling.
  16. I like those radius center drills but they can be...

    I like those radius center drills but they can be hard to get. Not many understand what they are and will ship you the wrong thing. You want type R.
  17. IMO, just because the small circle didn't do one...

    IMO, just because the small circle didn't do one of the rotations about it's center doesn't mean it didn't rotate, or that the rotation didn't "count."
  18. Very cool. I assume the top and bottom dies are...

    Very cool. I assume the top and bottom dies are identical. Seems doable at home with any good vise, but getting the really pretty results requires machining the radius feature on the dies; not easy...
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    My small Logan is probably stronger than the...

    My small Logan is probably stronger than the Myford but at 3.5" it would be a chattering mess even at a low back-gear speed. I've cut off much milder 2.5" steel and it wasn't fun. Have to agree with...
  20. Mark Knopfler to Chet Atkins- "You've played...

    Mark Knopfler to Chet Atkins- "You've played before."
  21. My VFD probably reads current but I'd think the...

    My VFD probably reads current but I'd think the condition of the surface would be the first indicator of a problem and way more sensitive than power or current.
  22. Yes, that's the one! Common as dirt but I've no...

    Yes, that's the one! Common as dirt but I've no idea what it's called.
  23. We buy cheap imports and they seem to last for...

    We buy cheap imports and they seem to last for decades.
  24. This is related to a question I've had for a...

    This is related to a question I've had for a while. It's common to see a shaft with two protrusions, pretty much like what you could get with ground-away bolt cutters. The feature is so common there...
  25. No doubt the makers of planetary gearboxes...

    No doubt the makers of planetary gearboxes understand this well. I don't know what a formal proof would be, nor do I care. Another way to look at it is to simply slide the small circle around the...
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