A countersink hole is *hopefully* diagrammed below on cross-sectional view.

________      _______
               \   /
_________|  |________

They are machined with special countersink tools (cutters with various angles
of inclination and depth).
-- Fred Paul
Staff Engineer, PCB Operations
FLUKE Corporation
P.O. Box 9090, MS 55, Everett, WA 98206
VOICE:  425 356 5734   FAX:  425 356 6070, [log in to unmask]


******** your message follows **********

Date:    Thu, 25 Mar 1999 12:09:23 +0800
From:    Howard Lin <[log in to unmask]>
Subject: countersink hole

Hi all,

Has anybody seen countersink hole on PCB? What is it? How to make it?
Any input I will be very appreciated.
Howard
Maxedge Electronic Corp.
[log in to unmask]

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