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Question about 1" R8 collet

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  • Question about 1" R8 collet

    I just acquired a carbide tipped end mill with a 1" shank because I wasn't thinking.
    My collet set goes up to 7/8" but I can get a 1" collet listed as 'light duty'.

    Do any of you have such a collet and does it work OK?
    Mike

    My Dad always said, "If you want people to do things for you on the farm, you have to buy a machine they can sit on that does most of the work."

  • #2
    The largest I have is a 7/8" but I remember using a 1" in a shop I worked in. Best I can remember is it was thin and would not be good for heavy use. I think the "light duty" warning is valid.

    I suggest you buy a 1" x R8 holder rather than the 1" collet.
    It's only ink and paper

    Comment


    • #3
      Originally posted by Carld
      The largest I have is a 7/8" but I remember using a 1" in a shop I worked in. Best I can remember is it was thin and would not be good for heavy use. I think the "light duty" warning is valid.

      I suggest you buy a 1" x R8 holder rather than the 1" collet.
      +1.

      I have a 1" R8 collet and seldom use it. The reason they are considered light duty is that the 1" tool will be beyond the spindle, whereas a 7/8 or smaller will fit up in the spindle.

      A 1" is OK for things like spot facing but I wouldn't recommend milling with it.

      Brian
      OPEN EYES, OPEN EARS, OPEN MIND

      THINK HARDER

      BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

      MY NAME IS BRIAN AND I AM A TOOLOHOLIC

      Comment


      • #4
        +2. The original Bridgeport R8 collet set went up to 3/4". I have the 7/8 and 1", but they have so little point of contact, I wouldn't want to use it for anything with substantial cutting forces.
        "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did."

        Comment


        • #5
          Can you just get an R8 endmill holder? It sticks out beyond the spindle,and has a set screw for holding the end mill in on its flat spot.

          I'm not crazy about having the holder stick out beyond the spindle as it is more able to flex,but it may be the only way to use the 1" shank end mill.

          Comment


          • #6
            R8 Collet

            I have a 1" R8 that came with some other stuff. I have never figured out a use for it. It is way flimsy. Maybe couterbore, but NOT milling. I have R8 ER40 collets that go up to an inch. That works great. I have R8 end mill holders that go to 1-1/2" with setscrews. Those work good too. I like the smaller ones of those from 5/8 on down more than the big ones. Both my CNC mills are R8 so everything I do is R8 tooling. I've made some pretty heavy cuts with them, but that is usually 3/4 or smaller roughing mill. I don't like to push sideways too hard on the big ones that are hanging down a long way. The 7/8 collets are very thin at the top and sometimes one segment will break off. They work good until they break though.
            Last edited by Toolguy; 08-25-2011, 12:19 PM.

            Comment


            • #7
              Thanks guys.

              I think I may have to put this down to a mistake unless I run across a used R8 endmill holder.

              I found a new R8 endmill holder for twice the price I paid for the endmill.
              Mike

              My Dad always said, "If you want people to do things for you on the farm, you have to buy a machine they can sit on that does most of the work."

              Comment


              • #8
                Do what I did and use it as an excuse to buy an ER-40 collet set.
                Home, down in the valley behind the Red Angus
                Bad Decisions Make Good Stories​

                Location: British Columbia

                Comment


                • #9
                  Jeff has a reasonably priced set.
                  http://www.tools4cheap.net/proddetail.php?prod=r8em

                  Comment


                  • #10
                    Originally posted by Willy
                    Do what I did and use it as an excuse to buy an ER-40 collet set.
                    Jeff has that too. Out of stock though!
                    http://www.tools4cheap.net/proddetai...od=er40&cat=34

                    Comment


                    • #11
                      For a dealer in Ontario, give Accusize Industrial a whirl.

                      Their current PDF flier has all of the prices listed.

                      http://www.accusizetools.ca/upfile/Catalog%202010.pdf
                      Home, down in the valley behind the Red Angus
                      Bad Decisions Make Good Stories​

                      Location: British Columbia

                      Comment


                      • #12
                        Thanks Willy!

                        I got the endmill from him actually.
                        Didn't even think of checking Accusize for a holder. I don't want a set but I'll go for a 1".
                        Mike

                        My Dad always said, "If you want people to do things for you on the farm, you have to buy a machine they can sit on that does most of the work."

                        Comment

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