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Type: Posts; User: sfriedberg

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  1. Certainly looks like it would do that job.

    Certainly looks like it would do that job.
  2. Looks like it was meant to mount on two rods or...

    Looks like it was meant to mount on two rods or pins. So, guessing wildly, some sort of work/end stop for a specific job/fixture.
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    Most dividing heads have a 40:1 reduction ratio,...

    Most dividing heads have a 40:1 reduction ratio, meaning if you rotate the index plate 40 times, the output shaft goes around exactly once. If your head is 40:1, none of your existing hole circles...
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    And the square on the keys is how big?

    And the square on the keys is how big?
  5. This is guesswork, so take it with a pinch of...

    This is guesswork, so take it with a pinch of salt. Use a coarser (or fresher) medium for the initial blasting. That will leave deeper pits as the lapping compound takes off the high spots.
  6. Tool cabinet with shallow drawers, just laying...

    Tool cabinet with shallow drawers, just laying them flat and next to each other, sorted by size? It's what I do for my collection of MT shank drills.
  7. That's interesting. I suppose some of the...

    That's interesting. I suppose some of the physicists must have estimated the visible/UV yield in advance of the test, but I'm surprised it was "only" shade 10. I used shade 13 when viewing the...
  8. Safe to dress wheel heavily clogged with aluminum?

    I've recently started helping out a high school robotics team, and came across a really revolting situation with their 7" bench grinder today. Despite clear labels "DO NOT GRIND ALUMINUM" on both...
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    Look up "passivate" for stainless. Among a great...

    Look up "passivate" for stainless. Among a great many other things, citric acid has been used for small-shop low-hazard passivation.
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    I think, without going to the shop to look, that...

    I think, without going to the shop to look, that my Siemens 3-phase panel (purchased off the shelf at a local Home Depot!) has 30 spaces. So limited to 10 three-phase circuits. Not what I would...
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    You can certainly get something that suspends...

    You can certainly get something that suspends from the ceiling, but your local authority having jurisdiction (the electric code people, local to you) might want to see UL certification for the...
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    Cast iron is close to 3 times as dense as...

    Cast iron is close to 3 times as dense as aluminum. You should be able to distinguish cast iron from aluminum just by picking it up. Is it lightweight or is it heavy? If it's heavy, call it cast...
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    I have a substantially smaller (24x27) shop, with...

    I have a substantially smaller (24x27) shop, with one wall being 50% overhead door. I put the phase converter and a 3-phase loadcenter in the corner by the utility supply panel, ran 4x4 raceway...
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    Please don't destroy good 123 blocks with welding...

    Please don't destroy good 123 blocks with welding spatter. If they are already toast as far as precision surfaces go, that's a nice setup, but it's asking for a lot of contraction bending when you...
  15. It's an endmill sharpening fixture, missing some...

    It's an endmill sharpening fixture, missing some basic pieces. There should be at least one, if not more, ground cylinders with tool shank bores in the ends. The cylinders ride on the...
  16. 1.58" is 40mm. You probably have a bunch of tool...

    1.58" is 40mm. You probably have a bunch of tool shank adapters for a machine whose spindle or toolholder (maybe turret toolholders) has a 40mm ID.
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    I am chortling and clapping my hands. Well done....

    I am chortling and clapping my hands. Well done. Now please write it down, so it doesn't become obscure knowledge again.
  18. Sending PM

    Sending PM
  19. The photo in post#9 of the tools he's using...

    The photo in post#9 of the tools he's using clearly shows Vardex-style laydown inserts and matching toolholder.
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    I haven't seen it explicitly mentioned yet, but...

    I haven't seen it explicitly mentioned yet, but many of the later dual cone designs were engineered as explicit (simple) approximations to the Schiele curve.
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    Looks like a drill grinder, where the cutting tip...

    Looks like a drill grinder, where the cutting tip of the drill is ground on the internal cone surface of the wheel. Don't know make and model, sorry.
  22. I started with a very small granite toolmaker's...

    I started with a very small granite toolmaker's plate for benchtop use, and have been through three larger sizes, and now I need an even larger one for use with 3' (1m) straightedges.

    If I were...
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    While this may be unfair to some brand that's...

    While this may be unfair to some brand that's more expensive than I would consider buying, "There's no such thing as a good tap set". If it's a set, the taps are mediocre or far, far worse. If the...
  24. Only thing I'll add is that a slow drip of...

    Only thing I'll add is that a slow drip of lubricant is all you need, not flood coolant. Mag drills running annular cutters usually have a drip feed bottle of straight cutting oil, often fed through...
  25. Email sent.

    Email sent.
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