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  • collet angles

    I have a pretty good chart for most of the dimensions of a good wide range of collets but
    it doesn't list the taper angle.

    < http://shopswarf.orconhosting.net.nz/collet.html >

    Does anyone have a link to one with angles?
    Thanks.
    ...lew...

  • #2
    I never knew there were so many different collets, never seen half of them! I guess they figure all those collets can be identified by the other given dimensions. I haven't checked yet but would the angles be listed in the machinery's hand book??

    JL...............................

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    • #3
      Amount of experience is in direct proportion to the value of broken equipment.

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      • #4
        Several common ones are not on that chart. For example - R8, ER, AF, etc.
        Kansas City area

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        • #5
          Not complete, but angles are listed for a good many: http://www.tools-n-gizmos.com/specs.html
          A good reference for its comprehensiveness; however, it also does not list angles: Spindle Tooling Brochure 2348G Go all the way to the end of the PDF for cross reference and comparison.
          Last edited by Arthur.Marks; 09-26-2013, 10:39 AM.

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          • #6
            Originally posted by Toolguy View Post
            Several common ones are not on that chart. For example - R8, ER, AF, etc.
            That chart is intended to help find what collet fits what machine. In most cases it's referring to antique machinery. This is a companion chart: http://shopswarf.orconhosting.net.nz/colletap.html

            A guy who doesn't know that a B'port J head uses R8 is hopelessly lost.

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            • #7
              I thought HSM or Machinist's Workshop did an article on this years ago. They listed all the antique sizes and it covered a lot more than one page.

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              • #8
                You just need to do a bit of web searching. I found this one after a couple of minutes: it was about the fifth site that I visited.

                http://www.riten.com/pdf/collet-chuck-catalog-2007.pdf

                They have drawings on a bunch of collets with dimensions and angles.But not all collets are there.

                Perhaps you could make up such a chart and post it for the benefit of all here.
                Paul A.
                SE Texas

                And if you look REAL close at an analog signal,
                You will find that it has discrete steps.

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                • #9
                  Here's yet another type/size of collet.

                  Dimensions Length 2.229" Small diameter 0.758" Large diameter 0.992" Mid diameter 0.723" At the large end there's a straight area about 0.176" long Taper length is about 0.469" They have a 0.125" wide keyway in the small end, 0.033" deep. No threads, inside or out.

                  I have four in various sizes. No markings at all! I do have a collet chuck and adapter sleeve, came with a Montgomery Ward (Logan) 10" lathe. The chuck screws onto the spindle, collet goes into an MT3 adapter sleeve, into the chuck, then a holding ring screws on. If the sleeve gets stuck in the spindle, unscrewing the chuck pops it out.

                  Edit: Picture! http://www.flickr.com/photos/2774876...57639469853874
                  Last edited by Galane; 01-07-2014, 01:53 AM.

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                  • #10
                    Another reference including 3C and 5C

                    http://www.zagar.com/v/vspfiles/temp...-ID-OD-Pg2.jpg
                    CNC machines only go through the motions

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                    • #11
                      Still no angle listed. Must be it's not too important. I think it's about 10 deg. isn't it ????

                      JL.......................

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                      • #12
                        The Zagar ref includes angles..... but covers 3C 5C and other "C" series collets only.
                        CNC machines only go through the motions

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                        • #13
                          Hardinge had (still has?) a master collet listing book. Used to be free, I'm not sure if it's even available now, for sure not free anymore unless it's online. Around a hundred common collets listed in my latest version. No angles specified, only diameters, lengths, threads and so on.


                          Why is the angle important?

                          When we were re-grinding the spindle taper for our Hardinge 5C machine the factory advised to grind it less than the collet's 10 degrees. More like a 9.75 degree angle so the collet contacted the taper on the big end of the spindle taper.

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                          • #14
                            Originally posted by DR View Post


                            Why is the angle important?

                            When we were re-grinding the spindle taper for our Hardinge 5C machine the factory advised to grind it less than the collet's 10 degrees. More like a 9.75 degree angle so the collet contacted the taper on the big end of the spindle taper.
                            For that reason, perhaps........
                            CNC machines only go through the motions

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                            • #15
                              I have never found out what these collets are that came with my lever closer.

                              Andy

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