- In machining, a
counterbore (symbol: ⌴) is a
cylindrical flat-bottomed hole that
enlarges another coaxial hole, or the tool used to
create that feature...
- operations, like truing,
making fillets, chamfers, countersinking,
counterboring, etc. It may also
receive various surface treatments and finishes. The...
-
suitable for
quick and easy
drilling of
straight holes,
countersinking or
counterboring that are
perpendicular to both
directions of a
table surface. In comparison...
-
types of "back-" machining, such as back-spotfacing, back-boring, back-
counterboring, back-milling, and back-deburring. The
common theme is accomplishing...
-
following are some
related processes that
often accompany drilling:
Counterboring This
process creates a
stepped hole in
which a
larger diameter follows...
-
Changed from gas ring on yoke to
cylinder 13-3 1982
Eliminated cylinder counterbore and
pinned barrel/small
change in
cylinder length to 1.62" 13-4 1988...
-
typically flanged, and may fit into
standard Allen hex
socket cap ****
counterbores molded or
machined into
parts to be fastened.
Compared to
Allen hex sockets...
- Year
Modifications 57 1964
Introduction 57-1 1982
Eliminate cylinder counterbore and
pinned barrel,
change in
cylinder length to 1.67″ 57-1 1986 Nickel...
-
Soviet Union, but also its
various satellite nations. Many of
these were
counterbored post-war.
Model 1891/59 Carbine:
Commonly called "91/59s," the M1891/59s...
-
glued although it is not necessary. In
solid timber work it is
common to
counterbore a hole in the
frame or
carcase member to
conceal the head of the ****...
