1. #1
    Wish to cut some simple pipe bending rollers with a half round edge grooves 1/8, 3/16, 1/4 etc.
    Programming is simple, but :-
    Tooling :-
    First option is to use >1/8" RNMG insert but of course too small to be practical.
    2nd - Make an HSS form tool with side relief. Possibly on a parting blade. Difficult to get the rad. accurate?
    3rd - Use a 35 deg 04mm rad tool and approach from two sides with R&L/H tool.

    Any advice on good way to CNC these grooves very much appreciated.
    Last edited by Leadhead; 07-09-2018 at 06:26 AM.

  2. #2
    If I understand the task, I'd use a 35 degree insert in a straight holder. SVVCN holder.

  3. #3
    But this would make an interference of 17.5 deg. at each side as the control point tries to interpolate the radius.

  4. #4
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 2 Days Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 2,266. Received thanks 282 times, giving thanks to others 6 times.
    If I understand what you're trying to achieve, I'd probably go for a MDT (Multi-Directional Tool).

    APT do ones that use WDN inserts - https://www.shop-apt.co.uk/external-...serts-apt.html

    You can't hog metal like you can with dedicated tools, but they're ideal for profiles that would otherwise need a change of tool, but material removal/being as fast as possible are not the top priorities.

    Edit - APT also do MGMN style - https://www.shop-apt.co.uk/external-...n-inserts.html which would also work. In fact most grooving tools can be used for light profiling/turning provided the insert is clamped in place.
    Last edited by m_c; 07-09-2018 at 02:59 PM.
    Avoiding the rubbish customer service from AluminiumWarehouse since July '13.

  5. #5
    Much easier to help if you show us a picture of what you want to do.

  6. #6
    Pippin - Simply an accurate semi circular cut in the side of 40mm dia. bar.

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