584,850 active members*
4,362 visitors online*
Register for free
Login
Results 1 to 4 of 4
  1. #1
    Join Date
    Jun 2008
    Posts
    20

    Thread Whirling

    Anybody Thread Whirl on their Swiss machine? I have a Star 32 Lathe and want to thread whirl some taps & screws. I have an attachment with the 3 insert cassette, how does that compare with 6 inserts? Is it worth upgrading to the 6 insert holder? Where do ya get custom formed inserts (for things like bone screws)? Any tips, tricks, tool suppliers, or general info would greatly be appreciated. Thanks

  2. #2
    Join Date
    Feb 2008
    Posts
    267

  3. #3
    Join Date
    Oct 2007
    Posts
    45

  4. #4
    Join Date
    Mar 2008
    Posts
    1
    The concept is similar to the difference of a 2 flute end mill and a 4 flute. There are 3 basic possible improvements:
    1. Productivity - The chip load stays the same per tooth, which means productivity increases as a result of faster cutting velocity (C-axis rpm) and a reduce whirling cycle.
    2. Finish - The velocity (c-axis feed) stays the same which means the chip load per tooth is reduced.
    3. Improved Finish and Productivity - The chip load per tooth is reduced slightly but the overal cutting velocity has increased.

    I have done many bone screws both with the Schwanog 6 inserts and Utilis 12 inserts. In both cases the results were better finish and prducitvity. I have found the Utilis system however to have more accurate tip to tip repeatability, this actually had a result on better tool life, productivity and finish becuase each insert had a more even bite during the cut and the machine ran about 25% longer before an insert change was necesary.

    The most critical thing with more inserts is to have accuartely aimed high-pressure coolant for chip evacutation, it must be hitting the inserts. Coolant hitting near the inserts is not acceptible becuase the volume of chips being removed is 2 - 4 times greater becuase of the faster cutting time; the coolant must be focused on the inserts or the chips will not evacuate properly.

Similar Threads

  1. Thread spec for camera lens filter thread
    By cmays in forum MetalWork Discussion
    Replies: 6
    Last Post: 07-20-2016, 10:43 AM
  2. M42 x 2 thread, first thread is sharp! Help...
    By Driftwood in forum MetalWork Discussion
    Replies: 8
    Last Post: 08-24-2008, 08:17 PM
  3. M42 x 2 thread, first thread is sharp!
    By Driftwood in forum Uncategorised MetalWorking Machines
    Replies: 5
    Last Post: 07-19-2008, 05:09 AM
  4. MY X3 Thread
    By bryanrabb in forum Benchtop Machines
    Replies: 18
    Last Post: 01-14-2008, 06:58 PM
  5. Min Thread?
    By pp-TG in forum Mechanical Calculations/Engineering Design
    Replies: 3
    Last Post: 12-17-2007, 04:09 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •