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Type: Posts; User: Mechanola

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  1. Replies
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    Endorse that. It’s the Practical Machinist Forum...

    Endorse that. It’s the Practical Machinist Forum and your point is precisely what we can do. Everything else is castors’ or managers’ business. My experience with stress relief is based on the...
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    1,456

    Obsession. Yeah. Drill chucks. Mine are movie...

    Obsession. Yeah. Drill chucks. Mine are movie cameras. I know where tight tolerances or rather small deviations are important, which parts move fast and which slow. Differentiation helps.

    Know...
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    1,456

    Please don’t take it personally, of course you...

    Please don’t take it personally, of course you will because I’m pointing out something—

    it’s not tolerances that add but deviations, errors. A tolerance cannot be measured, it’s given by somebody...
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    Alright, two screws in the tap is a possibility...

    Alright, two screws in the tap is a possibility although still rather long. I think the designer simply thought, a tap on this side and one on the other—let’s simply let it go through . . .
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    2,125

    Fine pitch is also standardized. Do you mean...

    Fine pitch is also standardized. Do you mean regular?

    A two-inch long M 5 thread is sign of stupidity. The mating surfaces are so big that the threads will need overly much attention in order to...
  6. Replies
    39
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    2,908

    If you have a live A and/or B axis, do spinning...

    If you have a live A and/or B axis, do spinning tool roughing. R inserts, coolant, lighter cuts, but more feed. Last liberty is velocity of cut. Once found the right speed, program G96 SXXX just...
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    Hahaha, that makes me laugh, six sigma . . .

    Hahaha, that makes me laugh, six sigma . . .
  8. Replies
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    2,394

    I have learnt to first drill, then bore up, then...

    I have learnt to first drill, then bore up, then ream. Bore-up tool has three flutes, it still flexes to some extent in coil form.

    If drill makes bad walls, an intermediate turning operation can...
  9. The first cut is the most important. Clamp the...

    The first cut is the most important. Clamp the work as deeply in the vice as possible, it mustn’t stick out high on parallels. Check whether first machined surface is parallel to table. If not,...
  10. Replies
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    2,924

    Technically the design of that press is not good....

    Technically the design of that press is not good. The base plate on four feet bends under the pressure, one will never be able to maintain a deck flat. If it’s only to put pressure on the cards’...
  11. Replies
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    4,425

    If the minimum diameter is written on the bar,...

    If the minimum diameter is written on the bar, you only need to divide that measure in two. Who cares about insert tip radius, wear, and tool deflection?
  12. Replies
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    I take CHF 90 per hour. Specialised work costs...

    I take CHF 90 per hour. Specialised work costs more.
  13. What a stupid design of such an aluminium pocket!...

    What a stupid design of such an aluminium pocket! Certainly a wax fill is the way to go.
  14. I don’t think I have to report on the situation...

    I don’t think I have to report on the situation in this country. There are still medieval believes alive with many people here.
  15. The variance of machining is wide from highest...

    The variance of machining is wide from highest rate material removal under time and or financial pressure to leisure accidental project chipping. You have Inconel and Titanium and hardened-steels...
  16. Replies
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    15,361

    My Normenauszug, standards collection book,...

    My Normenauszug, standards collection book, edited by Schweizerische Normen-Vereinigung, Swiss Standards Association, says: Alle Masse auf einer Fertigungszeichnung sind mit Toleranzen bzw. Abmassen...
  17. What’s stupid about the project, in my opinion,...

    What’s stupid about the project, in my opinion, is to try to display everything in detail. I’d rather try to outlay the principles, for example what a lathe basically is. You can go even deeper by...
  18. Midlife crisis before 36? I had mine at 46....

    Midlife crisis before 36? I had mine at 46. Caught up for apprenticeship then and had an own little shop for one year and a half. Made mistakes, had to close and work for a wage again. Now at 57 I am...
  19. Replies
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    You can chamfer tubes with them. Probably need a...

    You can chamfer tubes with them. Probably need a sharpening grind.
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    Just do avoid to bring together permanganate...

    Just do avoid to bring together permanganate (bleach) and peroxide, everybody.
  21. I have made hand drafts now from April to June....

    I have made hand drafts now from April to June. All kind of parts, to be turned, milled, welded. With double weight and regular lines, the auxiliary lines, the arrows, the correct dimensions and...
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    I believe you, they’re not the ones who thought...

    I believe you, they’re not the ones who thought it out. Fools fear facts.

    Also I’m certain the design will be changed to two elements. I’d first turn the inner part, solid, fit a ring on it, clamp...
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    I’d want to know more about the piece, what it’s...

    I’d want to know more about the piece, what it’s used for and the like. To shoot the engineer is a good start but an interchange theorists-practitioners seems to lead further. My first reaction to...
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    YouTube...

    YouTube
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    Jim, that can’t be true because stupid don’t...

    Jim, that can’t be true because stupid don’t learn.
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