TYPES AND USES - Continued
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.
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
grommets which are installed along the edges of flags,
sails, mail bags, and similar items.
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 machinist's 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.
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.