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Technical What is this?

Discussion in 'The Hokey Ass Message Board' started by grimmfalcon138, Mar 17, 2018.

  1. grimmfalcon138
    Joined: Jan 14, 2010
    Posts: 164

    grimmfalcon138
    Member
    from az

    So I found a couple of these rods in a box of miscellaneous stuff I acquired. It looks, feels and marks on surfaces like pencil lead. So I'm going out on a limb and going to say they are probably graphite.

    So my question is. What would these have been used for? Obviously ive' never seen a mechanical pencil that big in my life, so im stumped. Any thoughts guys? MVIMG_20180317_134411.jpg
     
    chryslerfan55 likes this.
  2. MrMike
    Joined: May 21, 2010
    Posts: 138

    MrMike
    ALLIANCE MEMBER

    Not sure without having it in my hand, but if you put a graphite bar in a hole you can weld right up to it without the weld sticking, to repair a wallowed out hole. What does the diameter measure?
     
  3. grimmfalcon138
    Joined: Jan 14, 2010
    Posts: 164

    grimmfalcon138
    Member
    from az

    So far I have found two of them. One is 1.5", and the other is 2" in diameter.
     
  4. Probably a radioactive uranium rod...
     

  5. grimmfalcon138
    Joined: Jan 14, 2010
    Posts: 164

    grimmfalcon138
    Member
    from az

    Hmm, I was wandering why I'm growing a third arm from my chest! Lol.
     
    chryslerfan55 and 31Dodger like this.
  6. studebakerjoe
    Joined: Jul 7, 2015
    Posts: 790

    studebakerjoe
    Member

    Could be from big old battery. Found a bunch like them in an old dump years ago.
     
  7. BJR
    Joined: Mar 11, 2005
    Posts: 6,993

    BJR
    Member

    Could also be from a carbon arc search light. Like the ones used in WW2 to spot enemy planes. Car dealerships used them in the 50's and 60's when the new models came out to attract attention.
     
  8. -
    Close- Graphite can be used in for energy storage in large "heat banks" made up of hundreds (or thousands) of these, or similar shapes, heated up to hundreds of degrees. Or maybe it is a blank of compressed graphite waiting to get ground up get used for lubricants.
     
  9. redo32
    Joined: Jul 16, 2008
    Posts: 1,829

    redo32
    Member

    What are electrodes for a EDM made of?
     
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  10. Lepus
    Joined: Nov 18, 2016
    Posts: 309

    Lepus
    Member

    Graphite or copper
     
  11. grimmfalcon138
    Joined: Jan 14, 2010
    Posts: 164

    grimmfalcon138
    Member
    from az

    Thanks for the imput guys. Now I'm just trying to figure out what I'm gonna do with them.
     
  12. squirrel
    Joined: Sep 23, 2004
    Posts: 49,265

    squirrel
    Member

    maybe it's just raw stock.

    graph.jpg
     
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  13. grimmfalcon138
    Joined: Jan 14, 2010
    Posts: 164

    grimmfalcon138
    Member
    from az

    Hmm, thanks squirrel! That makes a ton of sense, the man who originally owned all this stuff was a maintenance man for the boiler room at a large hotel.
     
  14. Atwater Mike
    Joined: May 31, 2002
    Posts: 10,633

    Atwater Mike
    ALLIANCE MEMBER

    After the discovery of a similar set of 'rods' behind a barn in Winton, I was told they repelled carbon steel like similar magnets...the possessor called them 'platinum iridium'!
    I called him full of shit.
    I think they were similar to your graphite rods, if not the same. He was 'good for a story'...LOL
    I like the inclusion of such a thread, relevant as it is. 'HOT RODS'.....
     
  15. squirrel
    Joined: Sep 23, 2004
    Posts: 49,265

    squirrel
    Member

    I looked that stuff up when I needed to replace a carbon clutch release bearing.

    Sent from my Trimline
     
  16. rtp
    Joined: Aug 14, 2007
    Posts: 181

    rtp
    Member

    Carbon arc lights used rods about 5/8 in.dia. and copper plated . positive and negative rods were different , also had daylight and tungsten color . ran on D.C. power . A rod that large would use a very high amount of amperage.

    Sent from my VS987 using The H.A.M.B. mobile app
     
    BJR likes this.
  17. a friend gave me a 4" section of that stuff. he told me it came from the eagle pencil factory in town. i use it to back up holes to weld up as mrmike mentioned. it works well for that but gets really hot fast.
     
  18. Jethro
    Joined: Mar 5, 2001
    Posts: 1,582

    Jethro
    ALLIANCE MEMBER

    An old machinist told me that he would save graphite brushes from electric motors and generators and he would shape them like woodruff keys and weld up cranks and pump shafts that had stripped keyways . He said he put the graphite key in the stripped keyway and weld up to it then machine down the shaft.
     

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