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  1. Replies
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    293

    Hi icecats: I have had success re-hardening a...

    Hi icecats:
    I have had success re-hardening a cut-off Allen key , grinding a small dish on the end face to get some positive rake and forcing it through on the lathe with the tailstock for one-time...
  2. Hi Tom: That would be a brilliant solution if...

    Hi Tom:
    That would be a brilliant solution if this mold had hydraulic slides but it's going to run mechanical cam pins.
    If you are unfamiliar with how they work, a cam (or horn) pin is an angled...
  3. Moldmaking technical question: preloading taperlocks

    Good morning all Moldmakers:
    I have a mold build going on right now and I have a technical question for all you experienced designers and builders.

    I need to run two slides for two different...
  4. Hi All: I'm going to be the contrarian voice...

    Hi All:
    I'm going to be the contrarian voice here and recommend to buy if the OP thinks it is a good fit for his needs.
    I say so because it's plain, from his history on this thread, that he knows...
  5. Hi MetalArtistCandy: Cryogenic hardening follows...

    Hi MetalArtistCandy:
    Cryogenic hardening follows conventional heat treatment.
    In simplistic terms it "finishes" the conversion of Austenite to Martensite and acts to "improve" the physical...
  6. Replies
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    783

    Hi KK80: I agree with all who have advised...

    Hi KK80:
    I agree with all who have advised checking the resistivity of the water, and the recommendation to wash the parts before they go into the wire EDM to keep from contaminating the water with...
  7. Hi Fal Grunt: I'd make this on the wire EDM but...

    Hi Fal Grunt:
    I'd make this on the wire EDM but if you don't have one and can't get access to one, that's not much help.

    But you do have a surface grinder.
    So I'd just hog out what you can,...
  8. Replies
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    2,091

    Hi KilrB: You wrote: "We got 4 of the smaller...

    Hi KilrB:
    You wrote:
    "We got 4 of the smaller punches ground from carbide (expensive) but no one would quote the die block.

    I've got a piece of Leech LC112 waiting for some time in our CUT-200....
  9. Replies
    19
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    2,374

    Hi TonyStark: You wrote:"But if you can buy 50...

    Hi TonyStark:
    You wrote:"But if you can buy 50 printers at $5k/piece, that time per part drops to just a few min per part"

    But if you calculate the energy budget for those 50 machines you are...
  10. Replies
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    2,091

    Hi KilrB: Some things I'd consider: 1) I...

    Hi KilrB:
    Some things I'd consider:

    1) I notice the strip appears to have been slit...have you checked if the edges are still soft (per digger doug post # 2 and Milland post # 4)?
    I wonder if...
  11. Not to worry TeachMePlease: Your secrets are...

    Not to worry TeachMePlease:

    Your secrets are safe with me.

    Now what size was that again?
    Majestic, Unremarkable, or Pathetic?

    It's a mad mad world!

    Cheers
  12. What can I say??? Cheers Marcus...

    What can I say???

    Cheers

    Marcus
    www.implant-mechanix.com
    www.vancouverwireedm.com
  13. Hi All: For those who are unfamiliar with the...

    Hi All:
    For those who are unfamiliar with the process, here is a synopsis of MIM:
    Metal powder is mixed into a plastic or wax binder and processed into pellets.
    The aggregate is molded in an...
  14. Have any of you done a Titan metal injection molding project? Can you give me a lead?

    Good morning All:
    I have a customer for whom I designed and prototyped a bunch of parts that are perfect for metal injection molding, going into production.
    It's a dental project, and the ideal...
  15. Replies
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    1,483

    Hi Tatertots: For the type of shop you are...

    Hi Tatertots:
    For the type of shop you are describing, and for the class of work you want to be able to do, I would be looking for a "Teach" or "Toolroom" lathe ...something like the Haas TL1...
  16. Hi janvanruth: As a moldmaker I've had to cut a...

    Hi janvanruth:
    As a moldmaker I've had to cut a lot of 420 M stainless; it's one of the more common steels used for plastic injection molds.

    Here's my experience:
    For straightforward turning no...
  17. Hi there Zahnrad Kopf: Are you interested in...

    Hi there Zahnrad Kopf:
    Are you interested in trying a simple empirical test?
    How about if each of us cuts an identical form tool on a single stick of HSS; you put your form on one end, send it to...
  18. Hi Orionsgn: All good posts here; I'll just add...

    Hi Orionsgn:
    All good posts here; I'll just add a few tidbits from my own experience ( make lots of tiny stuff).

    I will often take the insert and nip off the whole tool nose radius, then diamond...
  19. Hi kustomizer: As Screwmachine and others have...

    Hi kustomizer:
    As Screwmachine and others have pointed out, your first step is going to be to find out whether it's an epicyclic gear train or an involute or some hand carved weirdass bastard...
  20. Replies
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    1,433

    Hi again Leviathan: As others have pointed out,...

    Hi again Leviathan:
    As others have pointed out, basic wire EDM is quite a bit less challenging than basic sinker EDM to make the machine go and do straightforward stuff so long as the machine is in...
  21. Replies
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    1,206

    Hi tayamo1: You DON'T want to have a 4 jaw self...

    Hi tayamo1:
    You DON'T want to have a 4 jaw self centering chuck unless your stock is perfectly (or almost perfectly) square.
    If it's out even 50 microns it will effectively only be a 2 jaw chuck,...
  22. Replies
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    1,433

    Hi Leviathan: You wrote: "the older (late...

    Hi Leviathan:
    You wrote:
    "the older (late 1990s) machines required a bit more finesse and tribal knowledge. Is that not the case?"
    Yes that is the case; one of the fundamental changes in ease of...
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    1,047

    Hi birdus: Send it out to a laser welder....

    Hi birdus:
    Send it out to a laser welder.
    Titanium is easy to weld...this sounds like a 15 minute repair.
    Laser welding gives you great control, almost no heat affected zone, microscopic weld...
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    Hi Zahnrad Kopf: Did you glass bead them to...

    Hi Zahnrad Kopf:
    Did you glass bead them to knock off the loose tungsten carbide grains before you ground the rake on them?

    Cheers

    Marcus
    Implant Mechanix • Design & Innovation > HOME...
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    Hi hansvandongen: Here you go...pics of my shop...

    Hi hansvandongen:
    Here you go...pics of my shop built T&C grinder.
    For scale reference, the mag chuck on it is 4" x 7".
    The table runs on balls and is made of A-2 hardened to 60 RC.
    Obviously,...
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