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Thread: Qualities of a good plumb bob

  1. #41
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    Default Re: Qualities of a good plumb bob

    Looking good so far Steve. That is a particularly orange/yellow piece of Indian Rosewood; it goes well with the brass/bronze.

    Ken

  2. #42
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    Default Re: Qualities of a good plumb bob

    Steve, just love the color of the rosewood metal. Great job.

    Jacques

  3. #43
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    Default Re: Qualities of a good plumb bob

    I think I stole the idea of brass and rosewood from Jack.
    Steve The Drill Sergeant
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  4. #44
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    Default Re: Qualities of a good plumb bob

    I've been thinking about the tip for the bob and am wondering if anyone knows of a threaded tip that can be bought anywhere/everywhere. That way The eventual owner of this bob can always source a new point.
    Steve The Drill Sergeant
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  5. #45
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    Default Re: Qualities of a good plumb bob

    Quote Originally Posted by schor View Post
    I've been thinking about the tip for the bob and am wondering if anyone knows of a threaded tip that can be bought anywhere/everywhere. That way The eventual owner of this bob can always source a new point.
    Empire lists a PN for a replacement tip, #90832, but finding one might be real hard. http://www.empirelevel.com/string-to...bobs/index.php

    What about just machining a couple? Or buying a cheap plumb bob to steal the point off?
    Last edited by scooby074; 12-10-2013 at 12:23 AM.

  6. #46
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    Default Re: Qualities of a good plumb bob

    I'll machine a couple, just was thinking maybe a source for replacements would be a good idea. I am not sure how often you would need to replace the tip. I guess it depends on how clumsy you are?

    Another thing, for a 3lb bob, what cord would be used and what diameter would it be? I am not going to provide a cord but need to drill the hole for it. I will make a threaded cap with a hole to insert the string and then tie a knot(s) in the string.
    Steve The Drill Sergeant
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  7. #47
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    Default Re: Qualities of a good plumb bob

    I'd be more apt to lose the threaded tip than drop the BOB. Sometimes not reinventing the wheel is a good idea. My comments are just for your consideration BTW.
    "Do it Right!"

  8. #48
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    Default Re: Qualities of a good plumb bob

    I'm probably in the same camp as you on that one rusty.

    Quote Originally Posted by Rusty View Post
    I'd be more apt to lose the threaded tip than drop the BOB. Sometimes not reinventing the wheel is a good idea. My comments are just for your consideration BTW.
    Steve The Drill Sergeant
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  9. #49
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    Default Re: Qualities of a good plumb bob

    I use 50 lb braided nylon fishing line on mine but any braided cord like that should do.

    I think that a replaceable steel tip is a good idea; my old surveyor's bob has one. They seem to be available as replacement parts still.

    Ken

  10. #50
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    Default Re: Qualities of a good plumb bob

    I did find they are available on some survey equipment websites. I'd really like to see them live, know of any places in Toronto or est end of toronto? I'll have to google it some more later.

    Quote Originally Posted by KenL View Post
    I use 50 lb braided nylon fishing line on mine but any braided cord like that should do.

    I think that a replaceable steel tip is a good idea; my old surveyor's bob has one. They seem to be available as replacement parts still.

    Ken
    Steve The Drill Sergeant
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  11. #51
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    Default Re: Qualities of a good plumb bob

    My Dad used to be a surveyor for structural steel...think, Toronto Dominion Ctr and Commerce Ct in Toronto.

    I still have his brass plumb bob, about 20 lbs it was 3" dia and about a foot long, and a 500' steel chain (tape measure).

    I rented the tape measure out a couple years ago to a company building a steel tank. The only way to measure the circumference is around the outside and no laser will do that. The tank was over 100' dia and the 500' just made it around.
    Dara
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  12. #52
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    Default Re: Qualities of a good plumb bob

    Got a pick of the bob?

    Quote Originally Posted by Dara View Post
    My Dad used to be a surveyor for structural steel...think, Toronto Dominion Ctr and Commerce Ct in Toronto.

    I still have his brass plumb bob, about 20 lbs it was 3" dia and about a foot long, and a 500' steel chain (tape measure).

    I rented the tape measure out a couple years ago to a company building a steel tank. The only way to measure the circumference is around the outside and no laser will do that. The tank was over 100' dia and the 500' just made it around.
    Steve The Drill Sergeant
    Check out MyShopNotes on YouTube.

  13. #53
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    Default Re: Qualities of a good plumb bob

    I would have to dig around for it, Its buried in an old tool drawer somewhere.
    Basically just straight, round with a small cone point on it...no hardened tip.
    Dara
    SPCHT

  14. #54
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    Default Re: Qualities of a good plumb bob

    Quote Originally Posted by Dara View Post
    Basically just straight, round with a small cone point on it...no hardened tip.
    Yep, sounds like a plumb bob to me... This is one of those tools that can be as ornate as you like, but in reality it's just a pointy weight on a string....lol.

  15. #55
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    Default Re: Qualities of a good plumb bob

    Steve, what is happening with the making of your plumb Bob???

    Jacques

  16. #56
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    Default Re: Qualities of a good plumb bob

    It's been cold in the shop and we've had some power outages. Lot's of things going on so my buddy's plumb bob is on hold for fabrication but that does not mean the design in my head is not progressing.
    Steve The Drill Sergeant
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  17. #57
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    Default Re: Qualities of a good plumb bob

    Steve, sorry but I cannot resist, does that mean that the reports of mind-numbing cold in the GTA were exaggerated?

    Ken

  18. #58
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    Default Re: Qualities of a good plumb bob

    It was cold but not for too long. It's been a busy christmas/newyears this year for me, and to heat up the shop for maybe a couple hours out there is just not worth it. I need to find a weekend of not going skiing or whatever and get back to doing something, winters always seem to tie me up more than summer.

    Quote Originally Posted by KenL View Post
    Steve, sorry but I cannot resist, does that mean that the reports of mind-numbing cold in the GTA were exaggerated?

    Ken
    Steve The Drill Sergeant
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  19. #59
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    Default Re: Qualities of a good plumb bob

    It was a bit warmer this weekend and with the rain last night everything basically iced up so we decided to not go skiing.

    I drilled and tapped the main bronze piece 1/2-20, turned down some 1" brass rod to 1/2" for about 3/4" long and threaded that 1/2-20. Drilled a 3/4" diameter hole through a 2" square piece of rosewood, then turned down the brass to fit. CA glued the wood to the brass. Screwed it into the main piece, centerdrilled then turned the main taper.
    IMG_00000471.jpgIMG_00000474.jpg

    Flipped the piece in the chuck, drilled and tapped another 1/2-20. Threaded another piece of 1" brass and screwed them together. Finish turn the whole piece with this mount.
    IMG_00000479.jpgIMG_00000482.jpg

    Still a few things to go, the stainless tip that will get threaded into the end and the string cap at the top that will be made from the 1" currently mounting the bob.
    Steve The Drill Sergeant
    Check out MyShopNotes on YouTube.

  20. #60
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    Default Re: Qualities of a good plumb bob

    Steve, your friend is going to be very happy, very nice.

    Jacques

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