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  1. Replies
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    I didn't think that you can crush profiles that...

    I didn't think that you can crush profiles that deep. I was thinking of more shallow profiles.
    How accurate is that method? Say your wheel has a given radius on the profile, how close is the radius...
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    I have heard and seen crush dressing, but never...

    I have heard and seen crush dressing, but never used it.
    The method I know works a bit different.
    Your's seems to be more basic and way easier for the simple equipped (not simple minded!).

    Is...
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    My cat doesn't care as long he gets food. And no...

    My cat doesn't care as long he gets food. And no wife trying to stop me from buying what I need. :)

    Funny side story:
    I went there with a friend who bought a surface grinder recently. During the...
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    Me too! I think the last lens is no lens, but a...

    Me too!
    I think the last lens is no lens, but a simple flat glass. I checked at the dealer wether the optics work, and they did (I'm a bit challenged with optics). Also, the sparks point in the...
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    I think, I have qualified yesterday! Got a...

    I think, I have qualified yesterday!

    Got a "Optidress" grinding wheel dresser for 80€. :)

    250651250652250653
    250654250655250656

    Only drawback, I don't have a surface grinder. :C
    I'll try...
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    Ahhh! That makes sense, thanks! I'll try that. ...

    Ahhh! That makes sense, thanks! I'll try that.


    Nick
  7. Replies
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    A few more findings, but still some way left to...

    A few more findings, but still some way left to get perfect …

    Regenerating in between:
    You don't always have to fully regenerate the sand (mulling etc.). It works for a few times to sieve the...
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    I remember that coolant started to smell after a...

    I remember that coolant started to smell after a week. But that was in the 70ies.

    I had coolant that kept good for several years after being mixed (and never filled up etc.).

    There are a few...
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    Here is my vote: Good old long proven water with...

    Here is my vote:
    Good old long proven water with soluble oil.
    It does not stare at you after some time if you let access air. Agitating it from time to time is also good. Some even have an air...
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    For bed leveling, 0.02mm/m is the right...

    For bed leveling, 0.02mm/m is the right resolution. Why? Well, look at the standard what it asks for.
    A good length is 200 mm, as the standard, in some places, ask for the support points to be 200...
  11. If you think 150 mm is small, what do you call...

    If you think 150 mm is small, what do you call this?

    240881
    First fail out of about three (they got better).

    240882
    The tool. Drill steel hardened and polished.

    240883
    It worked.
  12. I have some buts ... The plunger WILL seize....

    I have some buts ...

    The plunger WILL seize. You will have to bore it out. A hammer is not enough. I bored out four, then I got bored.
    How will you remove the dross when you assembled the whole...
  13. So that is a hot chamber. The best I could get...

    So that is a hot chamber.
    The best I could get was 4 strokes of the plunger, then it seized. BTDT.

    Here is a video. It is not public, because it failed and I gave up that path.
    Hot Chamber

    I...
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    I have a set of these...

    I have a set of these. A pair of them costs around 80 €. :oo:
    I got the complete set for 25.- €, NOS. He didn't know what he was selling to me.:D

    They slip on the anvil and spindle and are...
  15. [/COLOR] As you know by now, the...

    [/INDENT]
    [/COLOR]

    As you know by now, the OZ-people are always ahead of us!

    Stefan is my casting mentor.
    To my big fortune, he came to my very first casting party. We were all clueless. All...
  16. Have cast a few more parts with vacuum. But this...

    Have cast a few more parts with vacuum.
    But this one is the smallest one. Won't need smaller ones.

    238508
    A look at the split separation plane.

    238509
    Two on a tree. Parts will be sawn off...
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    I know this video. But as soon as the water gets...

    I know this video.
    But as soon as the water gets below the molten metal's surface, the fun is over.
    I spilled half a crucible of aluminium in 0.1 seconds that way. :o


    Nick
  18. Hahaha! A friend working in a foundry (QC) will...

    Hahaha!
    A friend working in a foundry (QC) will tell different stories. The engineers come up with a new part, and the old foundry man says that this will never work. And then, they discover that...
  19. Just for clarification: I do not think nor claim...

    Just for clarification:
    I do not think nor claim that I have invented something new. In foundry work, all has already been invented.

    I just combined what I had or got easily.

    Nick
  20. And in case someone wants to know where all this...

    And in case someone wants to know where all this crap belongs to and what is the progress of that eternal project ...
    I have a thread here. That forum is a bit better suited to my project. So I...
  21. ... and I absolutely didn't understand it that...

    ... and I absolutely didn't understand it that way. And even if you meant it that way, you just can say to me where you think it lacks.
    I'm not politically correct, and I don't want to be treated...
  22. Yes, the box is just made of MDF, that's what I...

    Yes, the box is just made of MDF, that's what I had at hand.
    I have cut a slot along the top of the box and put a silicone tube inside as sealant.

    I'm not preheating the mould, and until now I...
  23. and I forgot that I made a video: Vacuum...

    and I forgot that I made a video:
    Vacuum assisted casting


    Nick
  24. And how did I do this? The moulds are made out...

    And how did I do this?

    The moulds are made out of cold box core sand. I glue both parts together and add a standardized (my standard) sprue.

    Something like this:

    238136
    Assembled with sprue...
  25. Vacuum assisted casting in core-sand moulds.

    G'day mates!

    Ray has seen the model engine I'm working at.
    I think he has also seen my vacuum chamber, but at that moment, I didn't have the time to try it. On a different thread, I promised you...
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    I have seen that one. It is quite good for the...

    I have seen that one. It is quite good for the time available.
    Personally, I don't like his finishing with the curvy strokes, but that is just my own preference.

    I'm not so sure, but I think K&T...
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    It is not that I say that I don't like his...

    It is not that I say that I don't like his book/DVD, because I do it different. You might think that I am quite biased (that wouldn't make me angry at all). I do not sell my videos and don't earn any...
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    A friend of mine bought the book and DVD and I...

    A friend of mine bought the book and DVD and I have seen, read and watched both.
    I don't recommend buying them. Too basic. The best you can do is meet someone to show it to you.
    IIRC, in the video...
  29. Finally! Someone who puts an end to the...

    Finally!
    Someone who puts an end to the ferry-tale.
    In fact, there is only the advantage noted re the worn spindle. The rest are only disadvantages:
    With a RMP, the cross-slide is lifted upwards....
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    OK! So I'll say green strength from now on. :)...

    OK!

    So I'll say green strength from now on. :)
    Yes, alcohol seems to improve that. At least, my observation. Not every alcohol works (at least for my sand). Isopropanol does. After mulling and...
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    Ray, do you remember the core for the spindle...

    Ray, do you remember the core for the spindle mount? Made out of oil bound sand?
    Well, I let that rest for more than a week. Supported just at both ends. It didn't break or sag.
    I also tried that...
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    Me stupid! I didn't even know that there's a...

    Me stupid!

    I didn't even know that there's a casting sub-forum. Only realized it, when a thread of mine was moved over there (thanks for the clue by 4).

    I'm messing around with my waste oil...
  33. Replies
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    Regenerating oil bound casting sand

    Hi!

    I don't know how many backyard casters we have here. I know two of them: RayG and me.

    This thread is intended to be only about oil bound sand, green sand is something completely different...
  34. Replies
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    Delrin (POM) is hard to glue, to say the least....

    Delrin (POM) is hard to glue, to say the least. You can flame it or better etch with phosphoric acid.
    PA would be good for a stop, but also not something you like to glue.


    Nick
  35. Replies
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    A thread doesn't align precisely (coaxial). So a...

    A thread doesn't align precisely (coaxial). So a plunger is the right way.


    Nick
  36. Thread: Leather

    by MuellerNick
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    BT, your metal parts are a piece of art!...

    BT, your metal parts are a piece of art! Fantastic!
    That joint on the chair is just wonderful, the flow of metal and wood ... WOW!

    Chapeau!
    Nick
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    Those few deleted post really weren't something...

    Those few deleted post really weren't something to get upset about.
    They were funny, but not for children.
    Yes, I contributed to that. And not, I'm not upset at all. I appreciate the deletion of my...
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    I'm sorry. I thought that this can't be legal. :D...

    I'm sorry. I thought that this can't be legal. :D


    Nick
  39. Replies
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    That is a quite disappointing explanation! :( ...

    That is a quite disappointing explanation! :(

    Nick
  40. Replies
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    Me too!I also have a lot of tracebacks to Russia...

    Me too!I also have a lot of tracebacks to Russia for my scraping vids. I tried to translate a bit, but gave up real quick. They even don't have normal letters there. :wink:
    234364
    1. USA
    2. UK
    3....
  41. They all come from the same Chinese factory. And...

    They all come from the same Chinese factory. And it is a known fact, that they can't pronounce a "r", So the "RH thread" became a "LH" thread (transmitted over telephone).

    Nick
  42. Now that FP is slowly making it around the world....

    Now that FP is slowly making it around the world.
    I hope he gets reasonable money for here.
    Only question: Why didn't *I* find here? I would have made some model casting patterns before selling...
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    I beg to differ. A round nose tool is good for...

    I beg to differ.
    A round nose tool is good for high feed rates or a high DOC. With shallow cuts, the chip near the tangent of the tool to the part gets too thin for a good cut.
    A diamond shaped...
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    I tried to edit my first two postings, but to no...

    I tried to edit my first two postings, but to no avail. I see the images in both editors, but not in the preview.
    Well, I can't fix everything ...

    Nick
  45. Replies
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    Yes, the were casted there. But I brought some...

    Yes, the were casted there. But I brought some spares with me, just in case ...
    You should have seen their eyes, when I took over (someone else made basic explanations about patterns etc.).
    I only...
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    I think starting with gage blocks under both ends...

    I think starting with gage blocks under both ends of that "something" will be more stable and accurate. One end 1 mm, the other 1.02 mm. Then replace the 1.02 mm with 1.04 mm. Or something along that...
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    My Maho MH 700 C. A CNC mill (retrofitted with...

    My Maho MH 700 C. A CNC mill (retrofitted with LinuxCNC) and 700 mm travel in X. Initially, I thought I'll keep the Deckel for second ops or quick jobs. But I never used her since the Maho works....
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    Good boy! And good father! It is not as...

    Good boy! And good father!


    It is not as terrible as one might think. I rarely changed gears. One speed fits all[tm]

    Now, I no longer use my FP1. I wanted to sell here, but now I found a...
  49. Replies
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    Now that's an insult! :D All that isn't...

    Now that's an insult! :D
    All that isn't difficult. It is just a black art.

    Making the moulds isn't difficult. At that party, only one of those who made moulds had a little experience. The others...
  50. Replies
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    And here are the patterns: 232273 The parts...

    And here are the patterns:
    232273

    The parts we casted were given to the admins and mods. One model was cast in bronze (1.5 kg weight!) and handed over to the one where we had the party.

    And...
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