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Type: Posts; User: metalmagpie

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  1. Replies
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    324

    Why on earth label this post OT?

    Why on earth label this post OT?
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    293

    The key is the number '6'. When you see a number...

    The key is the number '6'. When you see a number in that font in that position you know you are looking at an import.

    I wouldn't buy that vise. Not unless you got change from a twenty..
    ...
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    2,774

    I worked in a quasi-IT position for awhile in a...

    I worked in a quasi-IT position for awhile in a medium sized semiconductor company based in Silicon Valley. I worked for a group that was distributed through all design centers worldwide. We all got...
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    Given that I want to have my own domain name, is...

    Given that I want to have my own domain name, is there an option to avoid shared hosting short of setting up an Apache server?
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    I'm experimenting with treadmill motors. The ones...

    I'm experimenting with treadmill motors. The ones I've found seem to require peak current of between 12 and 20 DC amps. I would happily list the horsepower ratings on the labels but I believe these...
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    The output of a variac is sinusoidal, not a pulse...

    The output of a variac is sinusoidal, not a pulse train whether width modulated or not.

    The output of a rectifier powered by a variac is a familiar sinusoid with every other pulse being mirrored...
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    I'm not developing an electric car or any system...

    I'm not developing an electric car or any system like that at all. I'm trying to make a slow speed lap that won't slow down at the touch of a finger.

    I got a different PM motor today. This one has...
  8. Many mag chucks are somewhat loosely bolted at...

    Many mag chucks are somewhat loosely bolted at one end so that they don't bow up when they warm up. The loose end can let the mag chuck shift during movement. Maybe tighten both ends down before...
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    First of all, great score! I have a Famco...

    First of all, great score! I have a Famco compound arbor press and love it. I don't think a week's gone by that I haven't used it.

    My bolster plate (aka 'platen') isn't original either. I got my...
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    I have to say I for one wish you'd keep this...

    I have to say I for one wish you'd keep this blatantly racist BS to yourself.
  11. Replies
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    OT? DC motor question

    If I connect a variac to a rectifier and feed the +/- pins to a DC motor, I can smoothly control the speed. If I wanted to bother to design one, I could do a PWM solution too - low duty cycle for low...
  12. Wound with aluminum. I wouldn't touch an old...

    Wound with aluminum. I wouldn't touch an old Linde.

    metalmagpie
  13. Maybe try naval jelly (oxalic acid) before the...

    Maybe try naval jelly (oxalic acid) before the hideously strong ones mentioned above?

    If you do use a wire brush try to get one with brass bristles or some kind of non-ferric bristles. Otherwise...
  14. Get a buddy to spray water over the part as you...

    Get a buddy to spray water over the part as you torch cut it. Don't forget, an oxy/acetylene torch can cut even underwater. If you flood the surface with water you often get rid of those warping...
  15. Or look into a treadmill motor. In any big city...

    Or look into a treadmill motor. In any big city treadmills can be had for free if you look a little. The motors have great big flywheels that are good quality cast iron. They are easy to speed...
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    Sometimes you want to cut with only the leading...

    Sometimes you want to cut with only the leading edge of the wheel. With a dressing stone like that, you can cut the wheel away everywhere except the leading edge very quickly. Same with...
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    I believe those bases are made thick because they...

    I believe those bases are made thick because they are intended to be machined to bring the slot to the desired relationship with center height.

    Another thing that happens with those is the springs...
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    ah - now I get it

    I have seen michiganbuck post several times that you should start a spindle by turning it on and then right back off a few times before you let it come fully up to speed. That didn't quite resonate...
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    I took apart a treadmill today to repurpose the...

    I took apart a treadmill today to repurpose the motor. Underneath the top surface of the belt is a board. One of those high density boards, quite heavy. On top of that board was a thin layer of a...
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    Does that have 12 radial positions, or 4?

    Does that have 12 radial positions, or 4?
  21. KO Lee grind head way lube felt replacement?

    (Sorry, I posted this to the wrong sub-forum.)

    My grinder head squeaks when it comes down after being raised up high. It is lubricated by two little oil reservoirs on the grind head. The oil gets...
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    Sanding belts have a shelf life. You don't expect...

    Sanding belts have a shelf life. You don't expect to buy 2 years worth of hamburger at once, do you?

    That being said, I have never had a Klingspor belt, even an old one, fly apart on me.
    I don't...
  23. OK. The site carbideplus.com calls out series...

    OK. The site carbideplus.com calls out series 1000 as rectangular and series 2000 as rectangular but with one corner radiused. And you can get any of the normal grades in either shape, C2 or C5, etc....
  24. It would, eh? Why do you say that?

    It would, eh? Why do you say that?
  25. Grades are different. C2, C5 etc.

    Grades are different. C2, C5 etc.
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