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  1. #31
    Join Date
    Nov 2007
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    melbourne australia
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    3,228

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    Quote Originally Posted by Michael G View Post
    If you cut nuts using a plunge technique with the relatively weak tools needed to get in the part, why with a more rigid and stronger tool would you revert to an offset technique for an exterior thread?
    Possibly because the more slender male part is more prone to chatter? In any case, you can use the offset technique for internal threads too. But then you have to swing your compound twice (+/- 30 degrees).
    Attached Images Attached Images
    Chris

  2. #32
    Join Date
    Jun 2007
    Location
    sydney ( st marys )
    Age
    64
    Posts
    4,887

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    In regards to offsetting the compound for threading and choosing not to try and find some theory based answer I would say generally it is opperater choice for external threads.

    Some may find it easier to return the cross slide back to zero and advance with the compound, rather than having to remember what the last reading on the cross slide was, as with the offset method the setting for the depth of cut will not be changed when the tool is retracted from the cut with the cross slide.

    At the end of the day which ever method you prefer, I would say that an operator should be comfortable with both methods.

  3. #33
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

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    Sounds good. I have a nifty little cross-slide stop so I don't need to check the cross-slide dial when winding it in again when using the offset method.
    Chris

  4. #34
    Join Date
    Mar 2017
    Location
    Sydney between denial & paranoia
    Posts
    88

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    Here's the bolt for the AXA QCTP

    20190710_124359.jpg


    Yo can see the spanner flats to tighten it up on the compound. The thread for the compound is 12g and the end for the nut is 2.0. Had to learn to cut imperial threads with a metric leadscrew.

  5. #35
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

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    Boris,
    I that a lamp arm attached to the back of your saddle?
    Chris

  6. #36
    Join Date
    Mar 2017
    Location
    Sydney between denial & paranoia
    Posts
    88

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    Quote Originally Posted by jack620 View Post
    Boris,
    I that a lamp arm attached to the back of your saddle?
    Yes, it has an accessory piece that sits on the back of the saddle and the lamp is mounted on/in it. The other hole was for a the coolant pipe, tap and nozzle which I removed. I don't have a need for coolant etc.

    20180727_115520 (1).jpg

  7. #37
    Join Date
    Sep 2018
    Location
    South Australia
    Posts
    88

    Default

    A quick update for those still awake.

    I picked up a '100 size' AXA type QCTP from Ausee Machines and Tools (no affiliation although they were great to deal with). The actual model is 111, it's a wedge type tool post.

    Best move I've ever made. Suddenly I'm not wasting time changing changing tools, shimming and setting up, I'm just getting on with the job and learning. It's amazing just how much more you learn in one session when changing tools is no longer a time-consuming chore.

    Just wanted to jump on here and offer my sincere thanks for all of you guys who helped out with wise, informed comments and advice.

    Cheers!



    Moz

  8. #38
    Join Date
    Sep 2016
    Location
    Adelaide
    Posts
    27

    Default QCTP for Hercus 260

    Quote Originally Posted by MosquitoGarage View Post
    A quick update for those still awake.

    I picked up a '100 size' AXA type QCTP from Ausee Machines and Tools (no affiliation although they were great to deal with). The actual model is 111, it's a wedge type tool post.

    Best move I've ever made. Suddenly I'm not wasting time changing changing tools, shimming and setting up, I'm just getting on with the job and learning. It's amazing just how much more you learn in one session when changing tools is no longer a time-consuming chore.

    Just wanted to jump on here and offer my sincere thanks for all of you guys who helped out with wise, informed comments and advice.

    Cheers!



    Moz
    Hi Moz -

    I do also have a Hercus 260 like you and also in progress in learning this machine also getting frustrated with setting up tools and looking for shims, more than turning anything. I was advised that you posted about the QCTP and just read all about it - I shall now start the process of saving up the pennies and so fourth to get a toolpost like that - is it really as good as you describe it?? what kinda tools did you buy for it? or are you using HSS?

    Just saw that you are from S.A. and your avatar indicates that you might be interested in motorcycles. Same same here. Small world

    cheers

  9. #39
    Join Date
    Sep 2018
    Location
    South Australia
    Posts
    88

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    Quote Originally Posted by justask4 View Post
    Hi Moz -

    I do also have a Hercus 260 like you and also in progress in learning this machine also getting frustrated with setting up tools and looking for shims, more than turning anything. I was advised that you posted about the QCTP and just read all about it - I shall now start the process of saving up the pennies and so fourth to get a toolpost like that - is it really as good as you describe it?? what kinda tools did you buy for it? or are you using HSS?

    Just saw that you are from S.A. and your avatar indicates that you might be interested in motorcycles. Same same here. Small world

    cheers

    Hi JA.

    Yes, it's that good. It's not perfect but it's oh, about a thousand times better than messing around shimming using a 4-way tool post. I find myself turning and learning a lot more rather than constantly messing around setting up the next tool for the next operation.

    I purchased via Ausee (no affiliation) and the cost for the actual QCTP kit with a handful of tool holders was not too bad. Of course it's addictive...you soon find yourself wanting a tool holder for every tool that you have! It just speeds everything up. Click-clack, continue working. Easy.

    I am using 12mm shank ebay tool holders (carbide inserts), cheap as chips, usually in kits of 4 or 5, say, standard, straight, boring bar, threading bar, parting. I wish the standard tool holders took 16mm shank tool holders but they don't - they'll hold up to around 14mm and that's it. Really not a big deal but I have some 16mm shank holders that I used to used in the 4-way that I'd like to save from permanent retirement.

    I feel like the QCTP has sped up everything for me. I went from faffing around and achieving relatively little in one session (I'm time poor) to getting a lot more done. I'm even cutting threads with confidence now.

    And yes, I ride, restore, modify and race motorcycles. That's what getting the lathe was originally all about for me - growing the ability to make/modify/repair bike parts.

    Hope this ramble helps.


    Moz

  10. #40
    Join Date
    Sep 2016
    Location
    Adelaide
    Posts
    27

    Cool QCTP for Hercus 260

    Quote Originally Posted by MosquitoGarage View Post
    Hi JA.

    Yes, it's that good. It's not perfect but it's oh, about a thousand times better than messing around shimming using a 4-way tool post. I find myself turning and learning a lot more rather than constantly messing around setting up the next tool for the next operation.

    I purchased via Ausee (no affiliation) and the cost for the actual QCTP kit with a handful of tool holders was not too bad. Of course it's addictive...you soon find yourself wanting a tool holder for every tool that you have! It just speeds everything up. Click-clack, continue working. Easy.

    I am using 12mm shank ebay tool holders (carbide inserts), cheap as chips, usually in kits of 4 or 5, say, standard, straight, boring bar, threading bar, parting. I wish the standard tool holders took 16mm shank tool holders but they don't - they'll hold up to around 14mm and that's it. Really not a big deal but I have some 16mm shank holders that I used to used in the 4-way that I'd like to save from permanent retirement.

    I feel like the QCTP has sped up everything for me. I went from faffing around and achieving relatively little in one session (I'm time poor) to getting a lot more done. I'm even cutting threads with confidence now.

    And yes, I ride, restore, modify and race motorcycles. That's what getting the lathe was originally all about for me - growing the ability to make/modify/repair bike parts.

    Hope this ramble helps.


    Moz
    thanks a lot - same here - roughly, I ride, restore, modify motorcycles. That's why I always wanted a lathe for me - growing the ability to make/modify/repair bike parts.

  11. #41
    BobL is offline Member: Blue and white apron brigade
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    7,182

    Default

    While we are on the topic of cheap QCTP here is a small experience I had recently when I purchased a couple of cheap QCTP tool holders from the Ozmestore.

    The tool headers were a standard AXA 250-101 tool holder, and a 250-107 (parting blade holder).

    Al my existing tool holders and the new 101 fits firmly on both locations on the QCTP, but the 107 only fits firmly one of the two holder positions.
    It seems like the ram on one of the positions comes out a bit less than on the other.

    When I check out the dimensions of the dovetail of the new 107 it's about 0.2 mm deeper that the the other tool holders which is too deep for the ram on one of the tool holder positions to make firm contact with the holder.

    I fixed this by placing a thin washer behind the tool holder ram face - the washer has to be thin enough so all the other tool holder still fit but it now seems to be working fine.
    .

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