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Type: Posts; User: jim rozen

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  1. On the older, threaded spindle machines, the...

    On the older, threaded spindle machines, the thread protector ring is backed off with a pin wrench, this pops out the collet adapter. On your lathe with the cam-lock spindle, you need to use a...
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    Sounds like he needs to get the radial play below...

    Sounds like he needs to get the radial play below 1/64 inch. Should be dead easy.
  3. Thread: OT Lead Pipe

    by jim rozen
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    Well-spoken. In the case mentioned above, the...

    Well-spoken. In the case mentioned above, the building clearly had the yard excavated to replace the drain line which had obviously had various repairs over the years. Around here the water lateral...
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    You are unlikely to be able to get that kind of...

    You are unlikely to be able to get that kind of sub-micron performance from a home-made mechanism. Give up now.
  5. Thread: OT Lead Pipe

    by jim rozen
    Replies
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    3,628

    Nah. Mexico paid for that wall. Go trump.

    Nah. Mexico paid for that wall. Go trump.
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    He's not measuring anything, the data are from...

    He's not measuring anything, the data are from the drive manual:

    "In any event, the VFD documentation suggests to me that it will draw 15.5 amps, which seems a lot compared to the 4.4 amp rating...
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    A lockable disconnnect for all the machines, then...

    A lockable disconnnect for all the machines, then is a good idea.

    Most VFD users have a remoted contol for thei drives, hardly anyone uses the keypad. The control functions are typically...
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    That's the *real* 'golden rule.' The guys with...

    That's the *real* 'golden rule.' The guys with the gold, rule. They're the guys with the money, they decide the hiring criteria. Society need not chime in here.
  9. Thread: OT Lead Pipe

    by jim rozen
    Replies
    73
    Views
    3,628

    Pipe may have been hardened with a bit of...

    Pipe may have been hardened with a bit of antimony or tin, but basically 99.9% Pb. They just replaced the drain line and water lateral in a local building, the water line was indeed lead. Drain...
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    1) you don't need to power the vfd via a...

    1) you don't need to power the vfd via a contactor. A suitably-sized switch is good. Bonus for correct overcurrent protection like a fuse.

    2) do not interpose any switches or contactors between...
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    Two different things. I believe at the moment...

    Two different things. I believe at the moment the single most important factor in increasing one's lifetime earnings is to get a 4 year degree after college. Graduate degrees don't increase that...
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    Yes. And in this case the person who started...

    Yes. And in this case the person who started this discussion has done so. There have been zero requests for 'what should I do' and the suggestions along that line have been met by him with polite...
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    My spouse *does* bang the resident plumber in our...

    My spouse *does* bang the resident plumber in our house!
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    Often the "job" involves learning new things and...

    Often the "job" involves learning new things and absorbing new information fast, and well. This is sorta like what you have to do in some arcane institution like, say a "university."

    To put...
  15. That is, the snap rings are user-added options to...

    That is, the snap rings are user-added options to prevent the "spin-off" effect!
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    Well put. Discussions about colon cancer are...

    Well put. Discussions about colon cancer are always problematic. Best of luck Limi, be sure to contact a WOCN specialist regarding your ostomy.
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    Short-timer, eh? =) College or trade...

    Short-timer, eh?

    =)

    College or trade school? Both.
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    Except the heat gun.

    Except the heat gun.
  19. I think two of the handles are fixed, and two are...

    I think two of the handles are fixed, and two are one piece that go right through and can be shifted to make one longer and one shorter. The knurled acme nuts (two are locknuts, and one is...
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    Is the housing aluminum? If so heat with heat...

    Is the housing aluminum? If so heat with heat gun or in oven, turn over and the bearings will fall out.
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    Our standard lube for copper is 50/50...

    Our standard lube for copper is 50/50 kerosene/lard oil. Dead sharp drills. The drill breakage mentioned is probably because of low spindle speed and excess feed rate per turn.
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    I advise against dubbing the edge on a 1/16 drill...

    I advise against dubbing the edge on a 1/16 drill going into copper.
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    I think 100 SFPM is about right. For a 1/16 dia...

    I think 100 SFPM is about right. For a 1/16 dia drill that's about 6000 rpm

    0.062 X 3.14 = .198 inch circumference = 0.0165 feet circumference

    100 ft/min / 0.0165 feet = 3030 rev/min

    What's...
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    Look close at the other clothes the men are...

    Look close at the other clothes the men are wearing. It's fall or winter, they're mostly wearing two or three layers. There's no heat in that shop and the hats are there to help stave off the cold...
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    What is the top spindle speed on this machine?

    What is the top spindle speed on this machine?
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