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  1. #1
    Join Date
    Oct 2010
    Location
    melbourne, laverton
    Posts
    1,910

    Default Cutting a tapered thread

    hi every one. Ths guy has a interesting video about cutting tapered threads on the lathe.
    Im sure people could think of many improvements to his method. its a simple convenient
    method.

    https://www.youtube.com/watch?v=OqLs...kqC_WFHhO_lBEA




    give me convenience or give me death

  2. #2
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,439

    Default

    Hi Aaron, Guys,

    Oddly enough I was watching exactly the same technique being used yesterday to cut some threads for 6000 psi hydraulic fittings in stainless steel. The only difference was that the chap I was watching was using a single chaser from a Coventry die head in a holder.
    Best Regards:
    Baron J.

  3. #3
    Join Date
    Oct 2010
    Location
    melbourne, laverton
    Posts
    1,910

    Default perfect

    I saw another beauty. im going to try it with a thread chaser


    https://www.youtube.com/watch?v=J0o3W4_LRBw

  4. #4
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    Thank You Azzrock
    That was a great video.
    There is no better use of a wet afternoon watching what these fellows can do with limited equipment and tools.

    My only regret is that I am unable to understand the audio.

    Some of the U tubes have subtitles and there's some very good techniques to be learned from various operators.

    Because of the language barrier it is often an instance of monkey see, monkey do, where one, at least, can get the gist of what is being demonstrated.

    Grahame

  5. #5
    Join Date
    Oct 2010
    Location
    melbourne, laverton
    Posts
    1,910

    Default videos

    the first video took a few sittings to watch. he drags it out. After reading the comments from other viewers it seemed like it must be worth my while to watch it.
    Plus Grahame. im glad you liked them. It doesnt hurt every now and then to so some the moderators like.
    Last edited by azzrock; 18th Jan 2020 at 09:10 PM. Reason: where do i begine

  6. #6
    Join Date
    May 2011
    Location
    Murray Bridge S Aust.
    Age
    71
    Posts
    5,942

    Default

    Hi Grahame,
    What's a wet afternoon?????
    I agree with you on being able to understand the audio, being partly deaf doesn't help either.
    Have been on a few where the subtitles were in another language too!!!
    Kryn
    To grow old is mandatory, growing up is optional.

  7. #7
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,439

    Default Tapered thread cutting.

    Hi Guys,

    Only because I watched a tapered thread being cut on Thursday, I can tell you exactly how its done.

    In the video he used a tap with a ground off end to produce a flat end to get up to the shoulder, you would just use a thread chaser in exactly the same way. With the chaser tool held in the lathe tool block, you would set the teeth on it at an angle such that it would match the angle of the taper that you want to cut, then you would set the lathe gears to cut the thread that matches the chaser and taper.

    The saddle would move in the same way as it would if you were single pointing the thread. Moving the top slide to put on the right depth of cut. Of course you would have to make sure that your chaser was set up properly with the cutter teeth on centre hight.

    The guy that I watched in the engineering works used a set of three go, no go, gauges to check each part that he cut. One to check the thread size at the root of the thread, one to check the actual thread diameter and one to check the thread length. Apparently the end of the thread had to be within 1/2 mm and dead flat.

    Fascinating to watch and very educational. Though with a 1000 plus to make I think I would have gone a little stir crazy by the end.
    Best Regards:
    Baron J.

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