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Thread Alignment Tool for 18x1.0mm

Discussion in 'Gunsmithing' started by motorcarman, Feb 9, 2020.

  1. motorcarman

    motorcarman Compulsive Collector

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    Feb 13, 2015
    Rural Wise County, TX.
    I'm looking to thread a heavy barrel PTR91. The muzzle diameter is about 17.9mm so 18mm should work.

    I cannot find 18x1.0mm TAT. Does anyone have one or know a company that makes one??

    I can get the die and I guess I can make one out of aluminum or brass but it would be easier to buy one if it was not $50 or more.

    Liberty Suppressors has 18x1.0mm as a standard option for the Fixed Barrel Adapter.
    https://libertycans.net/product/fixed-barrel-adapter/

    If none available I guess I will 'fire up' the mini lathe and get to work.
     


  2. motorcarman

    motorcarman Compulsive Collector

    2,322
    1,233
    113
    Feb 13, 2015
    Rural Wise County, TX.
    I guess no one has info so I bought a 3/4" aluminum 6061 round stock and turned a section down to 18mm and THEN stepped it to .305" to fit in the barrel rifling.

    Fitted the .305" section into a stationary chuck in the lathe and the DIE in the lathe chuck jaws.

    Slid the fixed chuck to the chuck jaws and turned the die/chuck by HAND (unplugged the lathe power cord) to thread the 18mm section.

    TAT_18x1.0c.JPG

    The one inch section of .305 fits tight in the rifle muzzle so it should keep the die aligned for threading. I had to knock it out with a long 1/4" steel rod wrapped with tape.

    I'll post when I get the Liberty Mystic X to the FFL and then I'll order the 18x1.0mm adapter from liberty.

    If there was a market for these I would make and sell but I seem to be the only guy that needs one.

    bob
     
    TxStetson and ZX9RCAM like this.

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