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Thread: Adjustable spanner

  1. #1
    mklotz mklotz's Avatar
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    Adjustable spanner

    An adjustable spanner made which accepts pins on one end and blades on the other. Pins and blades are made to size as needed. Blade spanners are used with lens retaining rings, among other uses.

    Last edited by mklotz; 07-11-2017 at 09:41 AM.
    ---
    Regards, Marv


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  2. The Following 4 Users Say Thank You to mklotz For This Useful Post:

    Altair (09-20-2015), kbalch (09-14-2015), Paul Jones (09-13-2015), PJs (09-16-2015)

  3. #2
    Paul Jones's Avatar
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    Marv, what type of steel did you use and what are the diameters of the rods? Looks like a really handy tool for working on optics.

  4. #3
    mklotz mklotz's Avatar
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    Quote Originally Posted by Paul Jones View Post
    Marv, what type of steel did you use and what are the diameters of the rods? Looks like a really handy tool for working on optics.
    The rods are 3/8" OD and are made of genuine scrapbinium. In my experience, instrument spanners are seldom used to apply a lot of torque so strength is not a big concern. For really small pins you might want to make them of drill rod and harden and temper them.
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    Paul Jones's Avatar
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    Thanks. My favorite source for hardened small pins are the pins from old teletype tape punches. Regards, Paul Jones

  6. #5
    mklotz mklotz's Avatar
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    Quote Originally Posted by Paul Jones View Post
    Thanks. My favorite source for hardened small pins are the pins from old teletype tape punches. Regards, Paul Jones
    Yeah, me too. The points in my slide hammer prick punches are made from them.

    I guess we're showing our age by talking about teletypes. I think my entire supply of 6-40 nuts and bolts comes from one I cannabalized.
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    Paul Jones's Avatar
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    Yes, I used my first computer in 1968 using punch cards for a CDC 6400 mainframe and then in grad school with 10 baud teletypes using search, replace and list line editors. When we upgraded to 30 baud teletypes we thought things we flying off the pages. By the time I finished my PhD in 1978, we were using full screen editors and the teletypes were being sold for scrap metal (and my lifetime supply of 6-40 hardware). Fast forward to today and we are doing everything in Java and moving to HTML5 and its looking more like back to the future for me.

  8. The Following User Says Thank You to Paul Jones For This Useful Post:

    PJs (09-16-2015)

  9. #7
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    excellent work on the spanner!!!
    Where there is a Will, there is a Way!

  10. #8
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    Thanks Marv! I've added your Adjustable Spanner to our Miscellaneous category, as well as to your builder page: mklotz's Homemade Tools. Your receipt:


  11. #9
    Content Editor DIYer's Avatar
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    Clever idea. Haven't seen a design like this before. Thanks for posting!

  12. #10
    Content Editor Altair's Avatar
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    Likewise, first time I've seen such a design. I love the fact that it's adjustable. Could be supersized too.

    Al

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