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  1. 5th December 2005, 11:57 AM #1
    garf
    garf is offline Intermediate Member
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    Default 7/16" ACME LH 10 TPI Tap

    Hi All,
    My first thread in this forum, will try not to cock it up.
    Looking to source a 7/16" ACME Left Hand threaded tap of 10 threads per inch,to manufacture a bronze nut for a lathe crossfeed screw. I think I could get one from US, but thought I'd try OZ first.I can buy the nut new off the shelf, but there is nothing to it, and the price a little over the top.
    I've also considered making a tap using the old feedscrew thread , but a HSS tap would be better still.
    Thanks in advance,
    garf
  2. 5th December 2005 11:57 AM # ADS
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  3. 5th December 2005, 08:27 PM #2
    benyop
    benyop is offline Novice
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    Default

    why not screw cut it in a lathe? A tap will end up costing you more than your new nut.
  4. 5th December 2005, 08:30 PM #3
    Grahame Collins's Avatar
    Grahame Collins
    Grahame Collins is offline Super Moderator
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    Default ACME nuts - beep beep!

    I googled 7/16" ACME LH 10 TPI Tap

    and found this http://www.armurerieduroi.com/pages/...athe_acme.html


    Is it a South bend cross slide nut, that you need to cut If it tis, this may help you and be heaps cheaper than a tap.

    http://www.millermachineandfabrication.com/

    Cheers Grahame
  5. 7th December 2005, 07:35 PM #4
    garf
    garf is offline Intermediate Member
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    Default Thanks problem "solvered"

    Bought new Screw and Nut from Hercus at Regency Park a suburb of Adelaide.
    Hercus built reproductions of the Southbend lathe that the Crossfeed Screw and Nut were out of. I didn't realise that they still stock some parts today even though they were building their lathes up to or over 50years ago.The nut is now a cast iron type where they were bronze in the Southbend,couple of other small differances but can easily be overcome. Total cost about $200 so not too bad. A set of taps, imported (7/16"ACME LH 10TPI) were about $100 before postage.
    Regards,
    Garf
  6. 7th December 2005, 08:14 PM #5
    Robert WA's Avatar
    Robert WA
    Robert WA is offline SENIOR MEMBER
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    Default

    Garf.
    For your "favourites", in case there is a next time.
    http://www.sutton.com.au/
    Sutton make a big variety of tools, including taps and dies and would be worth a look.
    I know them for their drill bits and holesaws and they produce a good product. I know nothing about machining metal so can't comment as to those tools.
    Rob.

    It only takes one drink to get me loaded. Trouble is, I can't remember if it's the thirteenth or fourteenth.
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