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5
Speed change
The revolutions and blows per minute can be adjusted
just by turning the adjusting dial. The dial is marked 1
(lowest speed) to 5 (full speed).
Refer to the table below for the relationship between the
number settings on the adjusting dial and the revolutions/
blows per minute.
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
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 HR4001C AND HR4010C
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 HR4001C AND HR4010C ONLY)
1. Switch lever
1. Adjusting dial
OFF
ON
1
006308
1
006334
Number on
adjusting dial
Revolutions per
minute
Blows per minute
5
4
3
2
1
480
440
360
270
230
2,750
2,550
2,050
1,550
1,350
006335
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
2
HR4001C
HR4010C
3
006309
1
HR4011C
3
2
006310
1
HR4001C /HR4010C
2
3
006311
1
HR4001C
HR4010C
2
3
006313