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  1. Replies
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    The problem with using the tailstock (though it...

    The problem with using the tailstock (though it may not be a problem) is that any misalignment between tailstock and spindle persists. You can put something in the spindle and dial it to zero...
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    How are you checking shoulder-to-tenon...

    How are you checking shoulder-to-tenon perpendicularity? I can see this going a dozen different ways...

    GsT
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    It's entirely dependent on how much and how...

    It's entirely dependent on how much and how aggressively you inlet the stock prior to bedding. Bedding is like wiring, it's way better to have way too much than to have a tiny bit too little. I...
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    I have seen that very thing ambitiously applied...

    I have seen that very thing ambitiously applied across all dimensions in drawings where +/- 0.025 would have been fine just about everywhere. OTOH, there's an argument to be made that expressing a...
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    Well, I'd be a liar if I said I'd tried it, but...

    Well, I'd be a liar if I said I'd tried it, but having given it a little thought, here's my thinking: the straight tip on my Co-Ax (Blake) is ~1.3" long and fairly thick. After that you hit the...
  6. Thread: will this work ?

    by GeneT
    Replies
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    904

    Huge +1. I recently moved, which means I...

    Huge +1.

    I recently moved, which means I sorted through my 'stuff'. I had tools and gauges I don't even recognize. People tell me I have a good memory, but my recollection of my own tooling says...
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    Well, there's a difference between dialing in to...

    Well, there's a difference between dialing in to <0.0001" and holding a 0.0001" tolerance. The former can be done, with patience. But holding a tolerance (e.g. machining a diameter to 1.0000" +/-...
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    Vimeo is pretty gun-neutral. Full30.com is pro...

    Vimeo is pretty gun-neutral. Full30.com is pro gun, but nobody has heard of them...

    GsT
  9. Replies
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    I don't believe there's a real danger in the sludge

    The first thing to note is the absence of health warnings. Machining aluminum is a common enough task that if the byproducts were harmful, I'd expect to have seen ample warnings - compare to...
  10. No, the TBAS is particularly designed to take out...

    No, the TBAS is particularly designed to take out that non-concentricity as well as lineal misalignment. If the bore were concentric to the outside and straight, a regular chuck would do (well,...
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    There's a lot of good info on indicators here:...

    There's a lot of good info on indicators here: http://www.longislandindicator.com/. I was surprised to find out that they don't think too highly of (newer) Mitutoyo or B&S. Their top pick is...
  12. I haven't tried it, but Steve Acker once...

    I haven't tried it, but Steve Acker once demonstrated putting a bearing surface on a barrel by installing a sleeve attached with bondo that he then trued between centers before using it as a bearing...
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    Yes, and that's how I perceive this thread. I...

    Yes, and that's how I perceive this thread. I very much value considered input from others. Thanks for lots of food for thought Butch!

    GsT
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    4,263

    Thanks for the clarification Butch. Yes, you...

    Thanks for the clarification Butch. Yes, you have two points dialed in. In theory the advantage of the Gordy method is that you're dialing in the first bit (let's say an inch) of the bore, rather...
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    That's a great question Butch, and I've reversed...

    That's a great question Butch, and I've reversed my thoughts on it a couple of times as I sit here pondering it. My answer above, was really addressing the Gordy method vs chambering between centers...
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    That's a good point Butch, and one I omitted. I...

    That's a good point Butch, and one I omitted. I check my setup frequently as I go along. I've seldom had anything move and the few times I've had a change in readings I've suspected machining...
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    Here's how I do it.

    An excellent machinist might cut things closer than I do, but I oops'd the first time, so I take a conservative approach. Get your reamer drawing and figure out what diameter and depth you can drill...
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    Shotgun and pistol powders are the same thing. ...

    Shotgun and pistol powders are the same thing. Most of those powders are, or can be, used for both.

    Parshal - a rotary tumbler with stainless medium will clean the COW right out. And thanks for...
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    At first I thought that was a .458 Socom, but the...

    At first I thought that was a .458 Socom, but the rim wasn't rebated, then I recall you talking about using .338LM brass as a parent for something like this - is that the case? What sort of powder...
  20. I haven't done it...

    ...but I think the first thing is to establish if there's really a problem. There're lots of round actions in competition and critical applications and adding a flat bottom would be an easy thing to...
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    It's hard enough, even if you're already interested

    I've been interested in BR for years. But I've never been in a good position to try it out (until recently). For starters, there just aren't a lot of clubs running matches. I formerly belonged to...
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    While utterly lacking the fine-art value of some...

    While utterly lacking the fine-art value of some of the previous examples, I think the Steyr Scout and some of Cooper's pre-Steyr prototypes fit the bill mighty nicely.

    GsT
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    Do you profile your own barrels? If so, how does...

    Do you profile your own barrels? If so, how does your technique differ when the shaft is scaled down that much?

    Thanks,
    GsT
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    That toolpost needs something in the picture so...

    That toolpost needs something in the picture so we A/B/C guys can see how big an EA is.

    GsT
  25. Thread: tpi to M

    by GeneT
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    We're working on it, and will be completely...

    We're working on it, and will be completely metric within six years. At least that's what I was told some 40 years ago...

    GsT
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