SOP is normally .005-.015 radius,  anything else needs to be specified.
Using a .093 dia cutter should give you a .046 radii.  (radii being 1/2 the
dia).  For an .043 radii your board house should use a .086 dia cutter.

Just a gentle reminder, you are the customer.  Seems some of these guys fail
to remember this.

Randy Bock Sr.
[log in to unmask]


----- Original Message -----
From: Phil Nutting <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, May 01, 2002 12:55 PM
Subject: [TN] Hole routing in PCBs


> Hi all,
>
> I wanted to tap into your collective knowledge (opinions).  We have a
small circuit board that is supposed to have a rectangular cutout to accept
ferrite cores.  My board house used an 0.093 diameter cutter with the
argument that it cut through the "corner holes" specified on the print.  He
says that I need to add a radius spec to my board drawing.  My board
designer (and I) have reviewed this board and think that it is clear what
should be done [we need the 0.043 (0.0215 radius corners) holes for
clearance].
>
> I have asked Steve Gregory to post a JPEG file of the board. It can be
found at;
>
> http://www.stevezeva.homestead.com/ and click on "Routing", or
>
> http://www.stevezeva.homestead.com/files/Routing.jpg
>
> How do you think this should be specified/machined?
>
> Thanks in advance.  Thanks Steve for posting the file.
>
> Phil Nutting
>
> --------------------------------------------------------------------------
-------
> Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
> To unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt delivery of Technet send e-mail to [log in to unmask]:
SET Technet NOMAIL
> To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
> Search the archives of previous posts at: http://listserv.ipc.org/archives
> Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
> information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700
ext.5315
> --------------------------------------------------------------------------
-------
>

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------