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1. Hammering only. For use with "hammering only" accessories. Use
this setting for chiseling.
2. Chisel adjustment. Use this setting to adjust the angle of the chisel
blade in relation to the tool. With a chisel mounted in the tool, twist
the chisel to the desired angle. Then, rotate the action selector to the
"hammering only" setting for use.
NOTE: To engage the hammering mechanism, maintain pressure on the
bit/chisel. When pressure is released, hammering stops.
OPERATION
To reduce the risk of injury, wear safety goggles or glasses with
side shields. Unplug the tool before changing accessories or
making adjustments.
WARNING
Electronic Feedback Control Circuit
These hammers have an Electronic Feedback Control Circuit (EFCC) which
helps improve the operation and life of the tool.
Feedback Control
The electronic speed control circuit allows the tool to maintain constant
speed and torque between no-load and load conditions.
Soft Start
The Soft-Start feature reduces the amount of torque reaction to the tool and
the user. This feature gradually increases the motor speed up from zero to
the speed set by the speed control dial.
Selecting Speed
The speed control dial on these hammers allows the user to adjust the
rotating speed (RPM) and the impact rate (BPM) of the tool.
To change the speed, set the speed control dial to the desired setting.
• Lower speeds provide more control when starting holes and reduce
'spalling' on breakthrough. Spalling occurs when pieces of material chip
off around the drilled hole on breakthrough. When chiseling in soft or
brittle materials, use lower speeds to reduce damage to surrounding
areas of the material.
• Higher speeds provide faster penetration when drilling and chiseling in
demolition work.
Selecting Action
Cat. No. 5337-20
The cat. no. 5337-20 demolition hammer is for "hammering-only". No rota-
tion is available. Only chisels and other "hammering-only" accessories
should be used.
Cat. No. 5339-20 (Fig. 3)
The cat. no. 5339-20 demolition hammer is for "hammering-only". No rotation
is available. The action selector is used to select the action:
Fig. 4
Hammering Only
Hammering with
Rotation
Chisel Adjustment
Cat. No. 5340-20
The cat. no. 5340-20 rotary hammer has "hammering-only" and "hammering
with rotation", depending on the type of shank inserted into the tool.
For "hammering-only": Insert a chisel or other "hammering-only" accessory
with a 3/4" Hex with 21/32" Round shank into the nose of the tool (see
"Inserting Bits and Chisels"). The rotational drive mechanism will run but not
engage with the chisel, resulting in "hammering-only" action.
For "hammering with rotation": Insert a drill or coring bit with a spline
xxx shank into the nose of the tool (see "Inserting Bits and Chisels"). The
rotational drive mechanism engages with the bit, resulting in "hammering
with rotation" action.
Cat. No. 5342-20 (Fig. 4)
Cat. no. 5342-20 rotary hammer has "hammering-only", "hammering with
rotation", and "chisel adjustment" settings. The action selector is used to
select the action:
1. Hammering only. For use with "hammering only" accessories.
Use this setting for chiseling.
2. Hammering with rotation. Use this setting for drilling holes with
drill bits. Do not use "hammering with rotation" when using chisels or
other "hammering-only" accessories.
3. Chisel adjustment. Use this setting to adjust the angle of the chisel
blade in relation to the tool. With a chisel mounted in the tool, twist
the chisel to the desired angle. Then, rotate the action selector to the
Hammering only setting for use.
NOTE: To engage the hammering mechanism, maintain pressure on the
bit/chisel. When pressure is released, hammering stops.
WARNING
Starting and Stopping the Tool
1. To start the tool, pull the trigger.
2. To stop the tool, release the trigger.
Locking the Trigger (Cat. No. 5337-20, 5339-20 only)
The lock button on the demolition hammers holds the trigger in the "On"
position for continuous use.
1. To lock the trigger, hold in the lock button while pulling the trigger.
Release the trigger.
2. To unlock the trigger, pull the trigger and release. The lock button will
pop out.
Fig. 3
Hammering Only Chisel Adjustment
To reduce the risk of injury, when using chisels or other hammer-
ing-only accessories in cat. no. 5342-20, the action selector must
be set to the "hammering only" position.