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Precision Small Machining & Manufacturing

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  • mickeyf
    replied
    I use needle ends for my adjusting needle in mixers for hit miss engines
    Guessing these mate with a female part that has a very similar taper to it - how do you make that? Or is it just a plain cylindrical hole, and the needle itself completely controls the mix? A quick google search did not tell me the dimensions of hand sewing needles, just that "9 is smaller then 2", etc.

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  • PS4steam
    replied
    I use needle ends for my adjusting needle in mixers for hit miss engines. These are standard hand sewing needles size 6,7,8,9. My wife is into quilting big time and gave me what she considered the best needle made. They were from England and on the box said they were imported from Germany, no name given from Germany. She also is a collector of antique sewing items. She gave me some needles from around the early 1900's pre WWI. I put them under a microscope. The ones from pre WWI were clearly smoother than the new ones which had barbs on them ie surface not smooth. I recently checked some newer ones and they were a bit better but not as smooth as those old ones. The old ones were probably made with processes that are totally banned now. The Schmetz is a sewing machine needle, that my wife uses exclusively in her machines, not sure they make a hand needle. Need to check, might look at one of the sewing machine needles.

    Bob

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  • Paul Alciatore
    replied
    "This way it´s easy to keep the secrets in house."

    Only if you do not have disgruntled employees. Not many companies can say that. Most of them go out of their way and spend a lot of money in creating them. And a non-disclosure agreement expires a lot faster then a patent.

    But will they learn?



    Originally posted by Noitoen View Post

    Use to do some work for Mustad fish hook and the also made their own machines without patenting them. The reason, they said, once you apply for a patent you submit your machine's description an drawings and also, patents expire. This way it´s easy to keep the secrets in house.

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  • dian
    replied
    i was thinking electropolishing. the big question remains: what kind of steel?

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  • lynnl
    replied
    Originally posted by dian View Post
    so today needles are better than 20 years ago?
    I would imagine that in some respects, but not all, that is generally true, though you might have to go back a bit farther than 20 years.
    My guess would be that the greater advances have probably been in the manufacturing efficiency.
    Of course, as with all technologies, advances in external related areas, e.g. metallurgy, metrology, etc. also contribute substantially to improvements.

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  • QSIMDO
    replied
    The Torrington Co. actually started as the Excelsior Needle shop.

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  • dian
    replied
    so today needles are better than 20 years ago?

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  • Noitoen
    replied
    Originally posted by lynnl View Post

    What's interesting, but not surprising, is that for the most part, they make their own mfg machines in-house. I guess that's common among such specialty manufacturing operations.
    Use to do some work for Mustad fish hook and the also made their own machines without patenting them. The reason, they said, once you apply for a patent you submit your machine's description an drawings and also, patents expire. This way it´s easy to keep the secrets in house.

    Leave a comment:


  • Rich Carlstedt
    replied
    I have worked for two " Leading edge companies" - They made products no one in the world could manufacture .
    Both were extremely creative internally -no politics- and had to build specialty tooling and machines not available anywhere.
    Fun places to work in
    Rich

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  • lynnl
    started a topic Precision Small Machining & Manufacturing

    Precision Small Machining & Manufacturing

    Ever wonder how sewing needles are made? ...Yeah, me too.
    Here's about a 9 minute video from Schmetz, in Aachen Germany, maker of most of the world's needles (per their claim).
    https://www.youtube.com/watch?v=nYiHIKz0kn8

    What's interesting, but not surprising, is that for the most part, they make their own mfg machines in-house. I guess that's common among such specialty manufacturing operations.
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