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Thread: Long Boring Head

  1. #1
    Supporting Member Canobi's Avatar
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    Canobi's Tools

    Long Boring Head

    Hi folks

    So my workshop is finally equipped enough to get a start on making the things I put it together for. Unfortunately, my small lathe's toolpost won't take boring bars with the kind of girth I'd like, so I opted to make a long boring head I can use in my ER32 collet chucks:



    The head is nothing special and was a simple turning job, though the finish on the head might make one or two of you wince a little but was done on purpose for artistic flair. I'veworks copper and did a fair amount of smithing in my youth and surface texture has always been an interest of mine. It occured to me while turning the head that it wasn't a critical surface so thought I'd see what controlled chatter could do. Though it's a bit uneven as I was testing it out for the first time.


    Canobi
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    It's not the destination but the journey you take to get there that matters.

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    500+ Homemade Tool Plans

    I prefer girth over length myself, also.
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    This thread is boring.



  5. #4
    Supporting Member Toolmaker51's Avatar
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    Toolmaker51's Tools
    You'll wind up with a lot of these. Most used are thru-hole as what you present here, along with flat bottom, and recessing. With correct bits they'll do more than bore; threading, snap and O-ring grooves, undercutting, etc.
    Sincerely,
    Toolmaker51
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    PJs (04-28-2018)

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    Thanks Canobi! We've added your Long Boring Bar to our Machining category,
    as well as to your builder page: Canobi's Homemade Tools. Your receipt:




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    Supporting Member Canobi's Avatar
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    Canobi's Tools
    Quote Originally Posted by Toolmaker51 View Post
    You'll wind up with a lot of these. Most used are thru-hole as what you present here, along with flat bottom, and recessing. With correct bits they'll do more than bore; threading, snap and O-ring grooves, undercutting, etc.
    I hadn't considered using one for those operations, thanks for the tip
    It's not the destination but the journey you take to get there that matters.

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    PJs (04-28-2018)

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    Supporting Member Canobi's Avatar
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    Canobi's Tools
    Hi folks

    I finally gave the tool a good test run. I used it to cut a radial slot in a part for my next build project (a keyway slotting attachment). I ground a new egde on the other side of the bit too as the original profile is far more suited to cutting internal grooves (as mentioned by toolmaker51).

    The new profile needed a regrind, my initial tast was on aluminium and it worked amazingly but the radii was too big for steel. It also took me a while to find the right feed n speed for the tool. I was treating it like a fly cutter at first and had been cranking the carriage leadscrew by hand, being that it only has one tooth but discovered I've actually made a real metal munching monster, which is only limited by my small lathes meagre capability.




    New profile prior to regrind:


    Initial test cut in alu:


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    Last edited by Canobi; 06-05-2018 at 04:07 AM.
    It's not the destination but the journey you take to get there that matters.

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