TM 9-243
USING A MACHINIST’S BALL PEEN HAMMER
The following procedure is one of many uses of the
machinist’s hammer.
1
To remove a spring pin from a shaft, select a drift
punch about the same diameter as the pin and a
machinist’s hammer having a face larger than the
punch head.
2
Hold punch (1) in your left hand centered over
pin (2), tap punch lightly with hammer (3). This
should move the pin.
NOTE
It may be necessary to apply penetrating
oil to the pin before it will move.
3
Catch the pin in your right hand before it falls out of
the shaft.
NOTE
After the pin is about half way out of the
shaft, you should not hold the punch.
CARE OF HAMMERS
1.
Check for cracks in handle (1). Replace handle if
cracked. Check for loose head (2). Replace missing
or makeshift wedges to be sure head is tight. If not
tight, replace handle.
2.
Periodically rub a small amount of linseed oil into
the wood handles (1) to prevent the wood from
drying out and shrinking.
3.
Replace hammer if it has a worn or chipped face (3)
or claw (4).
4.
Lightly lubricate metal parts when storing the ham-
mer for a lengthy period.
5.
Wipe oil and grease from rubber mallets to prevent
damage to rubber.
21-12
