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Thread: Insert Question

  1. #1
    Join Date
    Apr 2014
    Posts
    32

    Insert Question

    I purchased a Circle Machine Co. boring bar FCBI-250-4-5R and I'd like to know if there are any HSS inserts that would fit this and would be good for pre-boring chambers. I know I can use the carbide inserts TDAB but if I'm boring at slow speeds I may be better suited with HSS inserts (I talked with the girl at Arthur Warners and she did not carry this insert and could not recommend others). I'd also like to know what the model number and where I can get the screw that attaches these inserts to the bar. Thanks!

  2. #2
    Join Date
    Feb 2003
    Location
    Texas Panhandle
    Posts
    1,833
    Any particular reason to bore at slow speed? I use the Circle Industries 1/4" boring bar or Hertel or Kennametal replacement with the triangle carbide inserts and bore at about 1200 rpm when pre-boring chambers.

  3. #3
    Join Date
    Feb 2003
    Location
    Melbourne, AUSTRALIA
    Posts
    55
    Quote Originally Posted by HiWall View Post
    I purchased a Circle Machine Co. boring bar FCBI-250-4-5R and I'd like to know if there are any HSS inserts that would fit this and would be good for pre-boring chambers. I know I can use the carbide inserts TDAB but if I'm boring at slow speeds I may be better suited with HSS inserts (I talked with the girl at Arthur Warners and she did not carry this insert and could not recommend others). I'd also like to know what the model number and where I can get the screw that attaches these inserts to the bar. Thanks!
    TS3 - Carbide Depot
    Last edited by Michael Huebner; 09-04-2018 at 12:58 AM.

  4. #4
    Join Date
    Apr 2014
    Posts
    32
    Quote Originally Posted by Mike Bryant View Post
    Any particular reason to bore at slow speed? I use the Circle Industries 1/4" boring bar or Hertel or Kennametal replacement with the triangle carbide inserts and bore at about 1200 rpm when pre-boring chambers.
    My lathe is a SB Heavy 10". I therefore am limited in my highest speed.

  5. #5
    Join Date
    Dec 2003
    Location
    washington.........STATE that is.
    Posts
    9,520
    Quote Originally Posted by Michael Huebner View Post
    TS3 - Where you get your inserts!
    Explain please? I searched "TS3" and got nothing....

  6. #6
    Join Date
    Jan 2007
    Location
    USA
    Posts
    5
    Al,
    Try Carbide Depot Inc.

  7. #7
    Join Date
    Apr 2014
    Posts
    32
    Quote Originally Posted by Riverwolf1 View Post
    Al,
    Try Carbide Depot Inc.
    I think the part number at Carbide Depot is: TS-3 or Tool-Flo TF 9HTS3 - 2-56 x 1/8"

  8. #8
    Join Date
    Apr 2014
    Posts
    32
    Quote Originally Posted by HiWall View Post
    I think the part number at Carbide Depot is: TS-3 or Tool-Flo TF 9HTS3 - 2-56 x 1/8"
    I just noticed that this part is sold in pack of 10 only. Not sure if the TS3 Mitsubishi MIT 108737 part is the same part which is $2.14 and sold as QTY 1. Would anyone know if this screw would fit the Circle Co. FCBI-250-4-5R boring bar? Thanks!

  9. #9
    Join Date
    Jan 2015
    Location
    Greenwood, Ca
    Posts
    120
    Carbide will work fine at less than optimum speeds. You’re going to be shoving a reamer in after it so surface finish isn’t critical. I wouldn’t sweat it on a manual machine. Get what you can easily get. Ideally, you’d pick your insert then by the holder/bar that fits it.

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