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  1. #151
    Join Date
    Oct 2007
    Location
    Sydney
    Posts
    3,112

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    Quote Originally Posted by RayG View Post
    I learned that I don't have any left handed boring bars.... never realised I'd need one... Josh was boring a 6" hole in a cast iron block, and needed to mount the boring bar horizontally, which means you need a left handed boring bar, since you can't run the mill backwards, the boring head would unscrew off the arbor..

    Ended up brazing a bit of carbide upside down on a right handed boring bar (after slight modifications with a high precision angle grinder.. )

    Moral of the story, get left and right handed versions when buying boring bars...

    Regards
    Ray
    Also handy when your toolpost just doesn't quite reach out far enough on big jobs

  2. #152
    Join Date
    Aug 2008
    Location
    Charlestown NSW
    Age
    65
    Posts
    1,669

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    Quote Originally Posted by DarBee View Post
    But my old Pop told me that it had a controllable water dripper to add the correct amount of water to the carbide rock in order to get the amount of Acetylene needed.
    Heres some pics of my light.

    bollie7
    Attached Images Attached Images

  3. #153
    Join Date
    Aug 2010
    Location
    ACT
    Age
    84
    Posts
    268

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    I can remember carbide gas generators, no bigger than the normal tradies gas bottle, used with an oxy bottle for welding.
    Also the old miners carbide lamp.
    Regards
    Hugh

    Enough is enough, more than enough is too much.

  4. #154
    Join Date
    Aug 2008
    Location
    Charlestown NSW
    Age
    65
    Posts
    1,669

  5. #155
    Join Date
    Oct 2008
    Location
    Cairns, Q
    Posts
    666

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    When I started working in a North Queensland sugar mill in the early fifties all the oxy sets in the mill were equipped with acetylene generators, and used a special blow pipe which was suitable for the low pressure acetylene produced. I never got to use one of these, so don't really know much about the details. From memory they were a bit bigger than a modern large acetylene cylinder. I came across one in a museum recently - nobody knew what it was!

    We also used rather crude open flame carbide lights when it was necessary to work outside at night.

    Frank.

  6. #156
    Join Date
    Oct 2011
    Location
    Norwood-ish, Adelaide
    Age
    59
    Posts
    6,542

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    I discovered that it's a good idea to check plans and drawings made a while back as age does not make them mistake free...
    I've been wanting to make up some sector fingers for my rotary table and came up with a plan of attack a while back. Today I finally got to using the plan and discovered that I'd assumed the fingers were mirror image but really they are the same part just turned around. Shame really as the rest of the plan worked really well.

    Michael

  7. #157
    Dave J Guest

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    Quote Originally Posted by Michael G View Post
    I discovered that it's a good idea to check plans and drawings made a while back as age does not make them mistake free...
    I've been wanting to make up some sector fingers for my rotary table and came up with a plan of attack a while back. Today I finally got to using the plan and discovered that I'd assumed the fingers were mirror image but really they are the same part just turned around. Shame really as the rest of the plan worked really well.

    Michael
    A least it would of only meant doing 2 set ups for the same part, LOL

    Dave

  8. #158
    Join Date
    Jun 2008
    Location
    Lindenow
    Age
    50
    Posts
    869

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    About an hour ago I learned not to pressurize an oil/diesel mix with clamp on fittings

    The shed is covered and stinks, I was covered and still stink 2 showers later
    Matt
    Warning Disclaimer

  9. #159
    Join Date
    Jul 2006
    Location
    Athelstone, SA 5076
    Posts
    4,255

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  10. #160
    Join Date
    Jun 2012
    Location
    SA
    Posts
    1,649

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    Quote Originally Posted by wheelinround View Post
    Just reading the price of Gas bottles these days I still have my Colt oxy kit and even tho they are small bottles there is no way I could even consider the outlay.
    Yes, it's an absolute killer.

    That's why I got rid of my oxy set.

    Just too expensive for the few times I used it.

    Try and sell an oxy set. You just about have to give it away. No one wants them.

    Rob

  11. #161
    Join Date
    Jun 2012
    Location
    SA
    Posts
    1,649

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    One oversight I will never forget was when I was cropping (ripping paddocks) one pitch black night, and stopped to fill up the Zetor tractor from some 44's on the back of the ute.

    Pumping from the drums like crazy in the dark to beat the weather and all of a sudden I heard this almighty "whooommmffff". Jeezus, what the hell was that ?

    Got the torch to investigate and the 44 was crushed like a coke can to about half it's size.

    Last time I forget to take the vent bung out of the drum

    Bro in law wasn't too impressed I'd buggered up his 44.

    Amazing the force of atmospheric pressure.

    Rob

  12. #162
    Join Date
    Sep 2012
    Location
    Coffs Harbour
    Posts
    9

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    That's the best laugh I've had in years.
    Just found this thread. Normally hang out in the woodies section.
    I'm a toolmaker and can just picture some of these things happening.
    Cheers
    Andrew

  13. #163
    Join Date
    Oct 2007
    Location
    Sydney
    Posts
    3,112

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    I learnt, or at least was reminded, to double and then tripple check engineering drawings as I'm machining. I was just finishing up a run of small cylinders, they were turned to size, reamed, and I was just bringing a flange to length as the last operation. I thought the flange looked a bit thin. Yes I was out by a millimeter, I thought the drawing was 2 mm and it was actually 3 mm

    Start again

  14. #164
    Join Date
    Jun 2011
    Location
    Australia east coast
    Age
    71
    Posts
    2,713

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    Quote Originally Posted by Pete F View Post
    I learnt, or at least was reminded, to double and then tripple check engineering drawings as I'm machining. I was just finishing up a run of small cylinders, they were turned to size, reamed, and I was just bringing a flange to length as the last operation. I thought the flange looked a bit thin. Yes I was out by a millimeter, I thought the drawing was 2 mm and it was actually 3 mm

    Start again
    Use a 1mm brass shim and make it look like you meant it.

    PDW

  15. #165
    Join Date
    Oct 2007
    Location
    Sydney
    Posts
    3,112

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    Quote Originally Posted by PDW View Post
    Use a 1mm brass shim and make it look like you meant it.

    PDW
    ha ha. The machining equivalent of talking out one's clacker; as long as it's said with a confident tone people will believe it. A little like when I used to do the long flights to the US. I'd sometimes emerge from the bunk to be asked by one of the Americans sitting nearby "What's in there?". I'd reply with a deadpan look on my face "Oh that's the engine room". There was typically a look of confusion on their face, a pause, and then "O .. oh ... ohhh, ow kay. Okay.", amongst increasing nodding of their head as they looked at my still expressionless face and convinced themselves that it must be true. Ah American's, gotta love 'em!

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