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What kind of collets do I have?

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  • What kind of collets do I have?

    What kind of collets are these?? They came from harbor freight about 10 years ago. They look like ER collets but the dimensions don't match. The set has 1/8 to 5/8. The 5/8 size is max id that will fit within the outside dimension of the collets. There is a sku number on the case 34730. The overall length is 1.787 inches and the outside diameter at the largest point is .943. Any help would be appreciated. Thanks.
    P.s.pic to follow.



    <a href="http://s194.photobucket.com/user/ahidley/media/20180915_023339_zpsvbpdjneq.jpg.html" target="_blank"><img src="http://i194.photobucket.com/albums/z80/ahidley/20180915_023339_zpsvbpdjneq.jpg" border="0" alt=" photo 20180915_023339_zpsvbpdjneq.jpg"/></a>

    http://i194.photobucket.com/albums/z...psvbpdjneq.jpg
    Last edited by ahidley; 09-15-2018, 03:39 AM.

  • #2
    SK16 ? OZ ?
    http://www.collet.com.tw/en/product-...M-A-CLASS.html
    Location: Helsinki, Finland, Europe

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    • #3
      MattiJ They are a differant shape....

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      • #4
        My bad, couldn't wait for pics..
        Location: Helsinki, Finland, Europe

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        • #5
          Seem like you are not the only one wondering those collets: https://www.homemodelenginemachinist...-collet.16186/

          Orginating from china so they could be some japanese or russian(sovjet) standard.

          TG75 is quite close but not really..
          Location: Helsinki, Finland, Europe

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          • #6
            A poster in that thread pointed to this table: http://www.tools-n-gizmos.com/specs/EOC_Collet.html

            EOC 16 seems to be the closest. Apparently, it's a DIN standard.

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            • #7
              Originally posted by CCWKen View Post
              A poster in that thread pointed to this table: http://www.tools-n-gizmos.com/specs/EOC_Collet.html

              EOC 16 seems to be the closest. Apparently, it's a DIN standard.
              I was already trying to sell OZ collet on first post
              Most sources give the EOC/ OZ16 /DIN 6388 B 415 collet length as 40mm which is quite a bit different from 1,78in (45,2mm)
              Location: Helsinki, Finland, Europe

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              • #8
                Maybe acura flex. I have a bunch if you want me to measure? JR

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                • #9
                  Way back when I bought my first machine and mill lathe combo from Busy Bee I got a Collet chuck on a MT3 shaft and some collets in wooden box that appear be exactly the same as yours.
                  I have tried a few times to identify them but so far have not been successful. Busy Bee no longer sells them so no point in asking them and there is no other identification on the collets except the size.
                  I don't use them much any more but would still like to find out what they are in case I ever need to try and buy more collets. So I am keeping an eye on this thread to see what turns up.
                  Larry - west coast of Canada

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                  • #10
                    Cuttings, aka Larry. What you have is what I'm looking for except I'm in search of a mt2. Are you willing to part with your set ? If so I could machine the mt3 down to a mt2 and be golden..

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                    • #11
                      JR. Yes please measure. Your link requires membership in order to view..

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                      • #12
                        Sorry, I still use them occasionally. I still have the Lathe/ mill machine and mainly just use the lathe on it now.
                        I bought an R8 to MT3 adapter and do use those collets on the new mill occasionally so I should keep them.
                        I think there was 1/4, 5/16/ 3/8 and 1/2 collets came in that set and once in a while I have had a need for a different size so have like you been searching to find what they are.
                        No luck so far but now that you have put it out here hopefully someone on this planet will know what they are .

                        By the way, when I first got them there was quit a bit of run out on anything mounted in this collet chuck.
                        I did a careful examination and found a small raised part just inside the lip of the collet retaining nut.
                        I don't remember how I did it now, but I managed to get a tool bit in there and machine the raised part off. It's been fine ever since.
                        Larry - west coast of Canada

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                        • #13
                          Larry. On mine the collet nut has a goofy hole that holds the collet. You have to cock it sideways and slip it into the nut. Once the collet is "in" the nut. The nut will remove the collet from the tapered bore by unscrewing it. If you don't slip the collet into that groove then the endmill will wobble.

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                          • #14
                            Mine are the plane ones. The nut comes off then I have to give the collet a bump with a piece of aluminum and a hammer.
                            Comes out easy then and doesn't hurt anything.
                            This morning I put one of my collets on the shank of a letter drill that fit it snugly and mounted it in the my lathe chuck.
                            I then measured the angles on the collet with a digital bevel as accurately as I could after zeroing it on the drill shank first.
                            The long taper on the inner end of the collet measured 4.2° and the forward bevel which was not too easy to measure was 29.75°. The diameter at the rear edge of the forward bevel was .943" and the length was 1.786" I was surprised to find that the angles were not that close to even numbers and none of the dimensions come to an even metric dimension either.
                            These collets look very similar to the RDO collets but the dimensions are not the same.
                            Larry - west coast of Canada

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                            • #15
                              No help here either https://www.practicalmachinist.com/v...collet-239158/

                              Even if they would conform to some esoteric standards you probably wont find them anywhere
                              Location: Helsinki, Finland, Europe

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