Slot drill / End mill with radiused tip

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Subject Author Date
Slot drill / End mill with radiused tip Boo 03-31-2008
Posted by Boo on March 31, 2008, 7:45 pm
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 Thanks to all for the answers but I think I have not been clear in what I need.
I am trying to make a slot as follows :


------ -------
######| |######
######| |######
######| |######
######| |######
######| |######
#######_____/#######
######################
----------------------


This has chamfers in the bottom as denoted by the and /. These chamfers could
be concave radiuses instead.


I'm therefore looking for a cutter like the following :

|#######|
|#######|
|#######|
|#######|
|#######|
_____/


The chamfers here could be convex radiuses instead. I did look uo bull nose
cutters but they just have a single semicircular tip and I want a flat bottom
instead. Also, all the corner rounding cutters I looked for are concave and are
used to round externaledges and so are not much use for the internal chamfers I
want.

Any ideas ?

Thanks,

--
Boo

Posted by mick on March 31, 2008, 8:22 pm
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 reply_to_group_not_me@spam_me_no_spam.net says...
> Thanks to all for the answers but I think I have not been clear in what I
need.
> I am trying to make a slot as follows :
>
>
> ------ -------
> ######| |######
> ######| |######
> ######| |######
> ######| |######
> ######| |######
> #######_____/#######
> ######################
> ----------------------
>
>
> This has chamfers in the bottom as denoted by the and /. These chamfers
could
> be concave radiuses instead.
>
>
> I'm therefore looking for a cutter like the following :
>
> |#######|
> |#######|
> |#######|
> |#######|
> |#######|
> _____/
>
>
> The chamfers here could be convex radiuses instead. I did look uo bull nose
> cutters but they just have a single semicircular tip and I want a flat bottom
> instead. Also, all the corner rounding cutters I looked for are concave and
are
> used to round externaledges and so are not much use for the internal chamfers
I
> want.
>
> Any ideas ?
>
> Thanks,
>
>
just take a standard slot drill and grind the end of the flutes to suit
--
mick

Posted by Trevor Jones on March 31, 2008, 10:20 pm
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Boo wrote:
> Thanks to all for the answers but I think I have not been clear in what
> I need. I am trying to make a slot as follows :
>
>
> ------ -------
> ######| |######
> ######| |######
> ######| |######
> ######| |######
> ######| |######
> #######_____/#######
> ######################
> ----------------------
>
>
> This has chamfers in the bottom as denoted by the and /. These
> chamfers could be concave radiuses instead.
>
>
> I'm therefore looking for a cutter like the following :
>
> |#######|
> |#######|
> |#######|
> |#######|
> |#######|
> _____/
>
>
> The chamfers here could be convex radiuses instead. I did look uo bull
> nose cutters but they just have a single semicircular tip and I want a
> flat bottom instead. Also, all the corner rounding cutters I looked for
> are concave and are used to round externaledges and so are not much use
> for the internal chamfers I want.
>
> Any ideas ?
>
> Thanks,
>
You looked at ball nose, not bull nose cutters, then.

I see that APTC does not seem to know thw difference, from their site.

Any real tooling suppliers in your phone book? Time to make some calls.

Tell them you are looking for a bull nosed slot dril, tell them the
diameter you want, and the radius you want. See what that can get you.

Or you can do what thousands before you have, and grind the radii
yourself, and stone the edges to final form.

If you are making stuff to spec, buy from a supplier that carries what
you need. If it's hobby stuff, good enough, really is.

Try also the term "corner radius endmill" and see if that gets you any
better info.

Cheers
Trev


Posted by jasonballamy on April 1, 2008, 2:53 am
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I'll say it again, J&L do the cutters you want. eg a 10mm dia cutter has
3mm radius corners, 8mm cutter 2mm radius corners etc.

Bottom of page 243 of virtual catalogue

Jason


--
jasonballamy
------------------------------------------------------------------------
jasonballamy's Profile: http://www.rcgroups.com/forums/member.php?u=203943
View this thread: http://www.rcgroups.com/forums/showthread.php?t=842183


Posted by Cliff Ray on April 1, 2008, 4:23 am
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jasonballamy wrote:
> I'll say it again, J&L do the cutters you want. eg a 10mm dia cutter has
> 3mm radius corners, 8mm cutter 2mm radius corners etc.
>
> Bottom of page 243 of virtual catalogue
>
> Jason
>
>
They even have them on page 9 of their current flyer valid till 18th April.

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