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Type: Posts; User: Matt_Maguire

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  1. Replies
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    I agree with dandummerman, the flame cut edge is...

    I agree with dandummerman, the flame cut edge is tough on tools (mill scale on the surface not so cool either). The mining truck company I worked for in the ‘70’s used to blast the roll mill scale...
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    I fixed your picture & I hope you really don't...

    I fixed your picture & I hope you really don't want that edge radius on the part...

    When I said break the fractures migrate toward each other & meet at the center of section when all is right....
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    I agree, many have said that here also. If the...

    I agree, many have said that here also. If the 4140HT is really 34rc it's running higher strength than only a few steel houses would supply. Tempering @ 1100F° instead of 1200F° buys you 150Ksi vs...
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    THIS^^^^ WE call it shear but what it...

    THIS^^^^



    WE call it shear but what it really does → "is break". You built a nice looking tool, Mike thinks you need 12.5%, the stuff I posted from jones suggests you could be nearing 15%...
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    Yup!^ Ohhhh! I forgot about Carpenter...

    Yup!^

    Ohhhh! I forgot about Carpenter :rolleyes5: they smoothed that bump a bit at 450F° temper by 1986 (still looks like .00025" though). Carpenter (D2) temper slope & bumps attached from 1967,77...
  6. I worked with a wallace aluminum 2ton years back...

    I worked with a wallace aluminum 2ton years back & it was too cool for school! It would go from 7ish to 10’ish high.

    They don’t weld anywhere on them so sawing some off the legs a bit could be...
  7. I can answer the original question, the dial is...

    I can answer the original question, the dial is easier for me to resolve. If I were to use a beam caliper daily I’d have a digital beam type, but I use my calipers rarely.

    These caliper threads...
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    Following Red in post#25, you can get away with...

    Following Red in post#25, you can get away with some flakey stuff with aloneymum… Consider what is possible in the first attachment below. I have no idea what the shear edge would look like at the...
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    All the chrome in D2 makes it grind pissy, so a...

    All the chrome in D2 makes it grind pissy, so a detail sent to the heat treat folks is usually a good idea. As mentioned above quenching from a too high (Ac3) temp will shrink it, over 1900F° will...
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    That’s what the old steamer guy that showed me...

    That’s what the old steamer guy that showed me his lathe tools called it. I’ve heard others call it a “back knife”. Concept similar to a broad nose shaper tool on steroids for low pressure shearing....
  11. OH! I plumb forgot about that... Matt

    OH! I plumb forgot about that...

    Matt
  12. If this is an older TOS W100A type he may have...

    If this is an older TOS W100A type he may have the spindle supports that clamp to the facing head (like 18-24”dia). In that case → HELL YES!

    They both clamp to the facing head, one clamps tight to...
  13. When power feeding I always liked to try & break...

    When power feeding I always liked to try & break chips with spade drills which generally needed feeds of .0075” or more per flute → per revolution. I much preferred a tool block on the cross slide...
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    No catalog but I linked a similar mill (working)...

    No catalog but I linked a similar mill (working) in the Ingersoll support thread.

    If left to nothing else you may be able to modify the insert seats to take supported inserts. It might need some...
  15. Looks like a big azz slot mill to me. This has...

    Looks like a big azz slot mill to me. This has been posted here before.


    https://www.youtube.com/watch?v=tf6tokKwKFg

    Good luck,
    Matt
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    Not worthless & not prolly cheap. A traceable...

    Not worthless & not prolly cheap. A traceable accelerometer (good) is very expensive.

    Never seen one in a toolholder but the tech has been useful since the beginning of the jet age when just...
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    @ Tallen, good chance your welder is in “synergic...

    @ Tallen, good chance your welder is in “synergic mode” where the user adjusts one knob and the machine decides the other settings. The main advantage (old timey) was for somebody to set the machine...
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    I’m not going to put my name on the inspection...

    I’m not going to put my name on the inspection report but I just tried that with my starrett 120A 9” caliper & could tell a difference (hard to resolve it correctly though). I had a lot of trouble...
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    You’ll get it. In the meantime attached below is...

    You’ll get it. In the meantime attached below is lost motion in a machine tool from Caterpillar U.

    Although CNC doesn’t have exactly the same problem as the old screws, most WILL yeild more easily...
  20. Since when did “old school” not include...

    Since when did “old school” not include fundamentals (& maybe some intermediate stuff tossed in)?

    I take Don at his word wherein one of his first videos (posted here) he said he wanted to give...
  21. I can’t imagine the owners were worried about...

    I can’t imagine the owners were worried about somebody stealing their repair type business, more likely is the worry of a customer seeing a video & questioning about how much time they were charged...
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    I believe he was saying the tool is always...

    I believe he was saying the tool is always advanced “toward” the new value. So that means when setting you touch off on the 0.625” bore and “move plus” in the same axis direction to enlarge the bore....
  23. I think both the optical and the end measuring...

    I think both the optical and the end measuring system went on more or less the same way. There were 2 spot faced areas with tapped holes on the knee you could clamp most anything to.

    They also had...
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    In post #1 last image, if that’s the view I’d get...

    In post #1 last image, if that’s the view I’d get with jewelers glasses on you can divide inside of 5’, one minute would be a stretch though. I think it’s a parallax resistant feature. The one in...
  25. Yes, they’re for end measuring rods reading in...

    Yes, they’re for end measuring rods reading in tenths. I suppose ID mics would kinda work (to .001”) if you made some sleeves for the troughs.

    As an aside, (may have been stated here before) it...
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