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Type: Posts; User: Video Man

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    No, this was a set Enco sold about 20 years ago,...

    No, this was a set Enco sold about 20 years ago, 1/8 to 1 inch in 1/16 inch increments, plus a few in 1/32 inch. I was influenced by an article in a very early Home Shop Machinist magazine whose...
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    Point taken, thank you!

    Point taken, thank you!
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    Those are mandrils, they are slightly tapered...

    Those are mandrils, they are slightly tapered cylinders used for holding things like gear blanks or other circular pieces with a center hole between centers on a lathe. Idea is you press the...
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    I made an adapter (air line for a narrow gauge...

    I made an adapter (air line for a narrow gauge loco, immaterial....) by boring the seat using the compound on my lathe and a small boring bar...just a thought....
  5. BCRider has a good point, there, and to that end...

    BCRider has a good point, there, and to that end I tapered the heads of a couple of socket-head capscrews to try out, and it seems like a real good idea. Never had a problem, but more secure is...
  6. My first insert tool was for the on-edge type; I...

    My first insert tool was for the on-edge type; I made my own simple holder which has worked fine for years. I now have the thread-form tools also, but the edge type has a very fine point and I have...
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    Actually, this is just looking ahead, as I see...

    Actually, this is just looking ahead, as I see the time coming but my last cardio visit resulted in wanting to do more tests, so I will cross that bridge when I come to it. I would bring the issue...
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    Very encouraging, thanks to all for your replies!

    Very encouraging, thanks to all for your replies!
  9. Thread: Milling math

    by Video Man
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    ANNND- it works a treat, thank you, Marv Klotz! ...

    ANNND- it works a treat, thank you, Marv Klotz! As to a cad program, they have their uses, but I punch up calculations on my workshop computer rather than booting a cad program and wading through...
  10. Thread: Milling math

    by Video Man
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    Thank you, much appreciated!

    Thank you, much appreciated!
  11. Thread: Milling math

    by Video Man
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    1,289

    Milling math

    Does anyone know the formula for finding the circumscribed diameter of a polygon with an odd number of sides, given ONLY the distance from a flat side to the opposite vertex, and the number of sides?...
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    Post-pacemaker welding?

    Looks like there may be a pacemaker in my future. I do some small amount of stick and tig welding (Miller 280 SD) in my shop. Wondering if anyone has experience with being able to --- or to not...
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    Umm, I think the poster said 20 splines, which...

    Umm, I think the poster said 20 splines, which would be 18 degrees apart....your drawing gives a good start on the process, however, as having calculated the x and y position for cutting one spline,...
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    I once has a shorter version of the screwdriver,...

    I once has a shorter version of the screwdriver, it was designed to facilitate carburetor adjustments. Flex made it possible to manipulate in a crowded engine compartment. This one is way longer,...
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    Gear tooth profile chart might be of some help: ...

    Gear tooth profile chart might be of some help: ...
  16. Yes, there is a free Basic emulator program that...

    Yes, there is a free Basic emulator program that works fine on Windows 10, also has Mac and Linux versions.
    And it will find your current printer, unlike GWBasic.
    ...
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    Did the lathe work making a couple of replacement...

    Did the lathe work making a couple of replacement steam cylinder purge valves for the local railroad museum, they ran their narrow-gauge loco off the tracks and smashed one; manufacturer long gone,...
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    Thanks for the help. the Nov-Dec HSM arrived...

    Thanks for the help. the Nov-Dec HSM arrived just fine, still missing MW. So I'll contact Village Press as George suggests. Thanks, all!
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    Dec=Jan Machinists workshop

    Has anybody seen the December-January issue of Machinists Workshop, or is mine lost in the mail?
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    You might check this stuff out, I have not used...

    You might check this stuff out, I have not used it but understand it is suitable for the purpose: https://www.gorillatough.com/product/clear-gorilla-glue/
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    FWIW my understanding is that vinegar works...

    FWIW my understanding is that vinegar works because it converts ferric oxide to ferric acetate (acetic acid, you see), which is water-soluble. It's not just the acidity, apparently.
  22. The OP is on the right track, historically...

    The OP is on the right track, historically speaking. Lard oil has been used in machining steel for many years. In WWII the government asked people to save fats so they could be made into machining...
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    I use a purpose-made coolant, Monroe Astro-Saw. ...

    I use a purpose-made coolant, Monroe Astro-Saw. It is made for the purpose, has no oil. Oil can play havoc if you have coated wheels and has to be removed if you're going to weld what you saw. ...
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    Here's the info for VLC for iPhone if you are...

    Here's the info for VLC for iPhone if you are interested: https://www.videolan.org/vlc/download-ios.html
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    VLC is a free video player that has a...

    VLC is a free video player that has a frame-by-frame function, also a slow-motion function. I assume but do not know if it is available for iPhone, it is available for Android so I expect it would...
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