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5
5
4
3
2
1
Number on
adjusting dial
Revolutions per
minute
Blows per minute
280
260
200
150
130
2,750
2,550
1,950
1,450
1,250
008417
CAUTION:
• If the tool is operated continuously at low speeds
for a long time, the motor will get overloaded,
resulting in tool malfunction.
• The speed adjusting dial can be turned only as far
as 5 and back to 1. Do not force it past 5 or 1, or
the speed adjusting function may no longer work.
Selecting the action mode
Rotation with hammering
1
2
HR4501C
HR4510C
3
008359
1
2
HR4511C
3
008365
For drilling in concrete, masonry, etc., depress the lock
button and rotate the change lever so that the pointer
points to the
symbol. Use a tungsten-carbide tipped
bit.
Hammering only
FOR MODEL HR4501C AND HR4510
1
2
HR4501C
HR4510C
3
008360
For chipping, scaling or demolition operations, depress
the lock button and rotate the change lever so that the
pointer points to the
symbol. Use a bull point, cold
chisel, scaling chisel, etc.
For long time hammering (FOR MODELS HR4501C
AND HR4510C ONLY)
1
2
HR4501C
HR4510C
3
008361
For chipping, scaling or demolition operations, depress
the lock button and rotate the change lever so that the
pointer points to the
symbol. Use a bull point, cold
chisel, scaling chisel, etc.
CAUTION:
• When using the tool in the symbol mode, the
switch trigger does not work and only the slide
switch works.
FOR MODEL HR4511C
1
2
HR4511C
3
008366
For chipping, scaling or demolition operations, depress
the lock button and rotate the change lever so that the
pointer points to the
symbol. Use a bull point, cold
chisel, scaling chisel, etc.
1. Change lever
2. Pointer
3. Lock button
1. Change lever
2. Pointer
3. Lock button
1. Change lever
2. Pointer
3. Lock button
1. Change lever
2. Pointer
3. Lock button
1. Change lever
2. Pointer
3. Lock button