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  • Users: eks32
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  1. eks32

    looking for explanation of GH5 tapping spec

    Hi, We have an application that requires easy threading of a 4" 1/2 13 bolt into a 4" long coupling nut. My problem is that every time I read the GH specs I find on the web, I can't tell which way the extra .0005" goes and/or whether it's a tap or die that is being discussed. We're looking...
  2. eks32

    simplest circuit to simulate an RS232 signal

    Hi, I've got a timing application for a few sensor channels. The circuit to monitor the event at each channel works fine, and I'm thinking that if each channel could just send "some" data over the serial lines, then a central PC could take care of all the timestamping. Is there a dirt simple...
  3. eks32

    US equivalent to 65Mn (Chinese steel) ?

    Hi, I've got hold of some samples of 65Mn stock (.050" thick) that seem "almost" like stainless. I'm told in China it's considered a cheap,tough steel good for a lot of applications requiring some temper. By this page http://www.castingsqd.com/products.htm it seems that 1065 is the closest...
  4. eks32

    Die casting questions: choice of Al-Zi-Mg alloys

    Hi, I'm designing a part with a size and complexity comparable to a standard retractable utility knive. These knives seem to be diecast from whitemetal (some alloy of Al,Zi,Mg) but my spec on surface hardness is tougher than the samples I've tested. This app is cost sensitive, and my reading...
  5. eks32

    easiest way to rustproof carbon steel that can withstand scraping

    Hello, I have some carbon steel straps (length=10" xsection: .06"x1.25") that see some friction and some humidity (indoor environment). Ideally, I'd like a wonder paint that is very tough, completely rustproof and can't be scraped off, but that all seems mutually exclusive. I could even see...
  6. eks32

    injection molded part design rule question: thickness variation

    Hi, All the design rules I've read on injection mold design suggest maintaining uniform thickness to avoid sinking. On my first design, I toiled for hours to get a uniform thickness (within %10) , the mold house was happy and the prototypes came back with all sorts of sinking. So the mold...

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