Aussie Engineers

Discussion in 'OFF-Topic / Misc.' started by Graeme, Feb 9, 2008.

  1. Graeme

    Graeme Well-Known Member

    Joined:
    May 31, 2007
    Messages:
    2,716
    Likes Received:
    166
    Trophy Points:
    63
    Gender:
    Male
    It’s Sunday afternoon and I’ve spent most of the morning drilling and ‘tapping’ ½ inch holes in steel for my current project. I recently bought a tap and die set (from a Chinese import shop!) which has a ½ NC 13 tap.

    I went to a local hardware store and purchased ½ inch bolts and to my horror found that they were binding after the first revolution. I re-tapped the holes but the problem remained.

    I returned to the hardware store to seek answers only to be told that the likely cause is that the ½ inch bolts they stock are Whitworth thread. (I couldn’t find any Whitworth tap and die kits).

    Whitworth?

    I tried a few other hardware stores but they all sell the same ½ inch bolt.
    There are no engineering firms open.

    A quick Google on Whitworth reveals…

    “Most of the coarse threads share the same threads per inch which means BSW nuts can be screwed onto UNC bolts and vice-versa. The exception to this being ½ inch -- ½ inch BSW is 12 threads per inch and ½ inch UNC is 13 threads per inch.”

    British Fasteners

    I was wondering if there are any Australians on the forum who can tell me if ½ inch bolts can be purchased in this country with a NC 13 thread, (and if so, is this a specialised and expensive item?) or am I ‘screwed’?
     
  2. freebird

    freebird Active Member

    Joined:
    Nov 12, 2007
    Messages:
    2,658
    Likes Received:
    3
    Trophy Points:
    38
    Location:
    British Columbia
    :confused: Reminds me of reading about the army RAF trying to explain to Churchill how complicated it was doing maintainance in the desert, then I imagine what it would be like if none of the spanners work...
     
  3. Wayne Little

    Wayne Little Well-Known Member

    Joined:
    Oct 7, 2006
    Messages:
    51,156
    Likes Received:
    847
    Trophy Points:
    113
    Location:
    Adelaide Sth. Aust.
    Mate you should be able to get what you want, but not at a hardware do a search for a fastener/Bolts and nuts outlet in your local area. Shouldn't cost an arm and a leg.....maybe a finger or two!...just kidding. Good Luck!
     
  4. Screaming Eagle

    Screaming Eagle Active Member

    Joined:
    Nov 26, 2006
    Messages:
    3,638
    Likes Received:
    0
    Trophy Points:
    36
    Occupation:
    Full time apprentice - Boilermaker
    Location:
    Queensland, Australia
    jeez, I wouldn't know, I should I'm an apprentice boilermaker!
     
  5. Graeme

    Graeme Well-Known Member

    Joined:
    May 31, 2007
    Messages:
    2,716
    Likes Received:
    166
    Trophy Points:
    63
    Gender:
    Male
    I laughed, but shouldn't have. I'm a klutz. I spent Christmas 2006 in the local Accident and Emergency Department after drilling a 3.2mmm hole straight through my left index fingertip. Never been the same since! The moral of the story is "don't drink and drill".

    This afternoon, 1/2 in NC13 bolts from these people.. Coventry Group
    And Whitworth tap/dies from these people.. Bromac Engineering Supplies
     
  6. Wayne Little

    Wayne Little Well-Known Member

    Joined:
    Oct 7, 2006
    Messages:
    51,156
    Likes Received:
    847
    Trophy Points:
    113
    Location:
    Adelaide Sth. Aust.
    Good on yer mate, New a fastener would get the job done, yeah use Coventry here now and then when I want something odd...

    Well I can relate to your accident, a couple of years ago I stuck a phillips head screw driver into my hand, just as I thought this is a bad idea I could hurt myself the way I was trying to loosen the screw, wham bam thankyou ma'am straight into the fleshy area between thumb and forefinger....boy did i use some colourful language...!
     
Loading...

Share This Page