Re: [CAD_CAM_EDM_DRO] Re: re: tapers post (for smoke)

Thanks, Doug

That clears up a lot!

Smoke
-----Original Message-----
From: dougrasmussen@... <dougrasmussen@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Sunday, November 12, 2000 9:56 PM
Subject: [CAD_CAM_EDM_DRO] Re: re: tapers post (for smoke)

>Smoke,
>
>There is a distinction between tool holding (precision shank size)
>and work holding (variable stock size) collets. R8 is a tool holding
>collet, I think I was told the tapers in spindle and on collet can be
>the same since the grip range is very small. A tool holding collet
>is typically drawn in with much more force than a workholding collet,
>that combined with the precision tool shank and short grip range
>makes identical tapers workable. I don't recall on the R8, but some
>tool holding collets are not self releasing.
>
> 5C is a work holding collet, we were told to grind the spindle so
>the contact was only on the outer end of the 5C collet when gripping
>stock of the nominal diameter of the collet. In a workholding collet
>with a full contact taper there are issues of friction and sticking
>instead of easy self release, both of which are undesireable for
>quick and easy action in work holding.
>
>doug
>
>
>
>
>
>
>--- In CAD_CAM_EDM_DRO@egroups.com, "Smoke" <Smoke@5...> wrote:
>> I would assume the reason for that is when using s spilt collet of
>any kind,
>> the taper would actually get less as the collet closed in on the
>tool shank.
>> How much would depend on the amount of close in.
>>
>> Waht would your thoughts on this be?
>>
>> Smoke
>> -----Original Message-----
>> From: dougrasmussen@c... <dougrasmussen@c...>
>> To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
>> Date: Sunday, November 12, 2000 8:26 PM
>> Subject: [CAD_CAM_EDM_DRO] Re: re: tapers post (for smoke)
>>
>>
>> >Smoke,
>> >
>> >Regarding tapers....you mentioned making some tooling for 5C, etc.
>> >In case you're making a spindle to seat a 5C, be aware that on work
>> >holding collets like 5C's the seat and the collet don't have the
>> >exact same taper. I've forgotten all the details, but when we were
>> >regrinding the 5C taper in one of our Hardinge lathes Hardinge
>techs
>> >told us to have the spindle angle something like about one degree
>off
>> >from the collet angle.
>> >
>> >Not sure if the above is true for a tool holding collet like an R8.
>> >
>> >Doug
>> >
>> >
>> >
>> >--- In CAD_CAM_EDM_DRO@egroups.com, "Smoke" <Smoke@5...> wrote:
>> >> Ah..thanks...I hadn't gone to the web page that shows the 5C
>> >collets. I was
>> >> looking at the spindle nose page.
>> >>
>> >> Smoke
>> >>
>> >> -----Original Message-----
>> >> From: ballendo@y... <ballendo@y...>
>> >> To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
>> >> Date: Sunday, November 12, 2000 5:59 PM
>> >> Subject: [CAD_CAM_EDM_DRO] Re: re: tapers post (for smoke)
>> >>
>> >>
>> >> >Smoke,
>> >> >
>> >> >At:
>> >> >
>> >> >http://www.cox-internet.com/drspiff/HSM/Collets/Collets.htm
>> >> >
>> >> >Under R8 OAL is 3.98 . length TO taper is 2.93 . So taper
>length
>> >is
>> >> >1.03. As mentioned before, diameters (taper) are given.
>> >> >
>> >> >Under 5C Length of taper is called out as 16.3 . Again, dia.
>are
>> >> >given.
>> >> >
>> >> >
>> >> >Hope this helps
>> >> >
>> >> >Ballendo
>> >> >
>> >> >
>> >> >>Nope...the overall length is show but nothein tha thows length
>of
>> >> >>taper.
>> >> >>Smoke
>> >> >
>> >> >
>> >> >
>> >> >
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>> >> >List Manager
>> >> >
>> >> >
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>> >
>> >
>> >Welcome to CAD_CAM_EDM_DRO@e...,an unmoderated list for the
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>
>
>Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the

discussion of shop built systems, for CAD, CAM, EDM, and DRO.

>
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