Functional description, Additional safety rules for hammer-drills, Foreword – Porter-Cable 877 User Manual
Page 6: Switch operation, Forward/reverse, Electric brake
6
ADDITIONAL SAFETY RULES FOR HAMMER-DRILLS
1.
Apply forward force only on pistol grip handle and ONLY with your
hands when drilling.
2.
Do not use bits larger than those recommended. They may cause
personal injury due to jamming and loss of control. Large bits may also
overload the drill and damage the motor and gears.
3.
Verify that the mode selecting ring, the speed selector, and the reversing
switch are in correct positions for the operation being performed.
4.
Use only percussion-type carbide-tipped bits when hammer-drilling.
5.
Always wear ear protectors and safety glasses when hammer-drilling.
6.
Do not attempt to cut through reinforcing rods with percussion-type bits.
7.
Should the drill bit become jammed in the work, release switch trigger
immediately to prevent personal injury. Remove the battery from the tool and
remove the drill bit from the work. Do not attempt to free the stalled bit by
starting and stopping the motor. This could result in bodily injury.
FUNCTIONAL DESCRIPTION
FOREWORD
Your Porter-Cable Cordless Hammer Drill/Driver is designed to drill holes and
drive fasteners in various materials as indicated in the following chart:
SWITCH OPERATION
Squeeze trigger switch (A) Fig. 1, to
start motor. Release trigger to stop
motor. As the trigger is squeezed the
motor speed increases.
NOTE: A low volume, high
pitched tone may be heard while
the switch is in the variable
speed mode. This is normal.
FORWARD/REVERSE
• Make sure trigger switch (A) Fig. 1, is in OFF position before attempting to
change direction of rotation.
• Push button (B) Fig. 1, toward left side of drill for FORWARD (clockwise)
rotation.
• Push button (B) Fig. 1, toward right side of drill for REVERSE (counterclock-
wise) rotation.
• Place button (B) Fig. 1, in center position to lock trigger switch in OFF
position.
ELECTRIC BRAKE
When the trigger switch is released, an electric brake automatically engages
to stop spindle rotation.
MAXIMUM CAPACITIES
SPEED
DRILLING
DRIVING
RANGE
MILD STEEL
ALUMINUM
WOOD SELF-FEED BIT
WOOD SCREWS
LOW
3
/
8
"
3
/
8
"
1"
3
/
8
"
HIGH
3
/
8
"
3
/
8
"
1
/
2
"
#10
Fig. 1
A
B
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