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Type: Posts; User: Matt_Maguire

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  1. The mar quenching here is just a "hot oil"...

    The mar quenching here is just a "hot oil" agitated bath quench… I hadn’t heard the “sealed quench” term used before now & looked it up. It’s just an oil quench where the parts stay in a protected...
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    Jim posted a great cartoon but forgot to include...

    Jim posted a great cartoon but forgot to include any angles??? Attached you値l find generic single point angles. Try the cast iron recipe based on material strength condition & then salt to taste.
    ...
  3. Thread: Apogee

    by Matt_Maguire
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    I知 with the jack the speed up club. When you...

    I知 with the jack the speed up club.

    When you have full pie jaws normal surface speeds work OK. When we had jaws like in the pic, then the RPMs got REALLY bumped up to 1200sfpm or more. Sometimes...
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    Attaching some info from the "wayback in that...

    Attaching some info from the "wayback in that day" shelf.

    Good luck,
    Matt
  5. Likely an okuma 7215 toolroom lathe would be...

    Likely an okuma 7215 toolroom lathe would be right in your wheelhouse for the 8' overall length. Might be in the 5000lb range though. Freaky cool machines for multi lead threading BTY. FINDING one...
  6. Bars like that were pretty common for old timey...

    Bars like that were pretty common for old timey production tooling. Think bore (small depth) and then counter bore or face with one tool. Most often seen on transfer lines stuck in machine tool...
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    The non ball bearing slides aren’t a problem...

    The non ball bearing slides aren’t a problem unless you fill them clear full with drills & toolbits. My near 50 year old top box with the itty-bitty pulls is still good to go.

    Hmmm… You gotta...
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    With chuck turning CCW → tool cutting away from...

    With chuck turning CCW → tool cutting away from chuck → then operator side of the part insert is upside down & from the backside of the part insert is right side up = both make right hand threads.
    ...
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    Clever, I’m an absolute sucker for task lights &...

    Clever, I’m an absolute sucker for task lights & still have the automotive trouble light I bought 1969 (all the rubber on it still good, not OSHA yellow though)… Have since purchased many more types...
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    You really need to get the table top parallel to...

    You really need to get the table top parallel to the ram before fixing the vice (bed or swivel base). If you do work on the vice first → any use of the swivel function of the vice will cause more...
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    That part looks like a shiny something I’d find...

    That part looks like a shiny something I’d find inside or around a fire truck… Those guys have NO sense of humor → but they are pretty parts. Often with NO straight or square sides to anything.
    ...
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    I like them that way even if they don't need to...

    I like them that way even if they don't need to be...

    Matt
  13. Prolly need 12'L x 6'W floor space & I can't...

    Prolly need 12'L x 6'W floor space & I can't remember if it will go under a 7' door. Pretty close though & that one looks more or less pristine. If you plan on align boring with it you need more...
  14. It’s unusual to have any thermal re-solution...

    It’s unusual to have any thermal re-solution under the surface with Oxy/fuel, arc/air or plasma/arc gouging. You DO get an oxide skin that cutting tools don’t like much though… The odd duck would be...
  15. I知 thinking the tool height is off also. NOW,...

    I知 thinking the tool height is off also. NOW, that 3 & 1/2 feet per minute surface speed is prolly lower than just doing it with a hand held die stock LOL! So 30ish SFPM would get you 300RPM and...
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    For the welder settings on that (assuming .035”...

    For the welder settings on that (assuming .035” S6 hard wire with C25 gas) I’d prolly set 320-340IPM wire @ 22volts, should run around 160-170amps.

    Good luck,
    Matt
    On edit, attached cheatsheet...
  17. If the boss has seen the thread he may be...

    If the boss has seen the thread he may be thinking sdinzy is going to end up in a different place than he is now. He does seem serious. It’d be a hoot if some dental lab folks started looking into...
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    Well darn, I just used the given spanner with my...

    Well darn, I just used the given spanner with my thumb near the collet with the other four wrapped around the handle. With the 100 & larger TG’s I might get a few inches out on the spanner but not...
  19. If your forming 1/4 rod, most used to use one of...

    If your forming 1/4 rod, most used to use one of the various .5-ish carbon flavors sold for press brake die use. These could be used 殿s machined to prove the shape & suitability and later easily...
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    One thing is for certain, if you don稚 have...

    One thing is for certain, if you don稚 have confidence and some proper practice nothing is going to work well for you. I知 not so 都kippy with gage pins either without practicing a bit to get the...
  21. If I understand correctly, the hard turning dry...

    If I understand correctly, the hard turning dry is giving you trouble with the finished size at room temperature... I've machined large things that moved consistently but never anything that is close...
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    24 teeth would be correct for a 6TPI leadscrew...

    24 teeth would be correct for a 6TPI leadscrew tracking 4 inches length, the 32T is correct for an 8TPI screw at that length, I致e never seen a thread dial track 6 length.

    I did 2 vids years back...
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    I call the three you enumerated first as beam...

    I call the three you enumerated first as beam type. I have too much respect for the tool to say “they look like a stillson or monkey wrench”.

    The leg type may actually be the value if that’s the...
  24. They池e doing 2 things there Larry, the post...

    They池e doing 2 things there Larry, the post machining thermal treatment is for aging and baking out any hydrogen that痴 migrated into the steel during the machining (trust me it痴 there).

    It痴...
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    Reaching in, up & around things, often done...

    Reaching in, up & around things, often done in-situation with beam type calipers is for most a non starter. My ID mics only go down to 1-1/2 inch so telescoping gages or ID spring calipers are the...
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