TM 9-243
TYPES AND USES - Continued
STARTING PUNCH
The starting punch has a strong tapered point capable of
resisting applied force. It is used to start the removal of a
pin from an assembly.
GROMMET-INSERTING PUNCH
The grommet-inserting punch consists of two parts. The
solid punch part has a tapered point and a flat shoulder.
The round die part has flat ends with a bored hole in one
end to receive the point of the punch. Grommet-
inserting punches are used to form the flange on grom-
mets which are installed along the edges of flags, sails,
mail bags, and similar items.
CATAPUNCH
The catapunch consists of a pointed head mounted on a
coiled spring shaft. It is used to mark centers on metal or
wood without the use of a hammer.
METAL CUTTING PUNCH
The metal cutting punch has an open, sharpened edge
on one end and a solid shaft on the other end. The
center portion of the punch is bowed for catching the
metal scrap. The metal cutting punch ranges in size
from 1/4 inch to 1 inch. Metal cutting punches are used
to punch holes in thin sheet metal and require the use of
a mallet or machinists hammer.
TINMEN’S HOLLOW PUNCH
The tinmen’s hollow punch has a solid metal shank
terminating in a sharpened, hollowed end. It is used to
punch holes through thin sheet metal.
SHEET METAL PUNCH
The sheet metal punch is a heavy-duty steel punch
approximately seven inches in length. It tapers to a fine
point and must be struck to produce the hole. It is used to
punch holes through sheet metal to take fastenings.
LEVER PUNCH
The lever punch incorporates an interchangeable punch
and a matching die or “anvil.” The die backs up the
material, prevents distortion, and leaves a clean hole.
This type of punch is used to punch small round holes
near the edges of metal or leather material.
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