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OPERATION
These rotary hammers have an Electronic Feedback Control Circuit (EFCC)
which helps improve the operation and life of the tool.
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.
Feedback Control
The electronic speed control system allows the tool to maintain constant
speed between no-load and load conditions.
Service Indicator Light
These hammers feature a service indicator light. When the red service
light turns on, the tool is ready for servicing. Return the tool to an autho-
rized service center.
NOTE:
When the service light is on, the tool will continue to run for a few
hours and then the motor will shut off.
Power Indicator Light
When the green power indicator light is on, current is entering the Elec-
tronic Feedback Control Circuit (EFCC) and the tool is ready for operation.
Selecting Action (Fig. 6)
(Cat. No. 5315-21 & 5321-21)
The 5315-21 and 5321-21 Rotary Hammers feature a stop rotation knob.
The stop rotation knob may be set for either “hammering-only” or “ham-
mering-with-rotation”. The 5315-21 Rotary Hammer has a third setting
that allows the angle of the chisel blade to be adjusted.
To reduce the risk of injury, when using chisels
or (other hammering-only accessories) in the
5315-21 Rotary Hammer, set the tool in the
“hammering-only” position.
1.
Hammering only.
For use with “hammering-only” accessories.
Use this setting (1) for chiseling or setting self-drilling anchors.
2.
Hammering with rotation.
Use this setting (2) for drilling holes
with drill bits.
3.
Chisel adjustment.
(Cat. No. 5315-21 only) Use this setting (3) to
adjust the angle of the chisel blade in relation to the tool. With a chisel
mounted in the tool:
•
turn the knob to this setting
•
twist the chisel to the desired angle
•
set the tool for hammering only
NOTE:
To engage the hammering mechanism, maintain pressure on the
bit. When the pressure on the bit is released, the hammering will stop.
3.
Check to see that bit is locked by tugging on it.
4.
To remove bits and chisels, pull bit release collar (1) toward the rear
of tool and remove bit.
NOTE:
Use caution when handling hot bits and chisels.
Setting the Depth Gauge (Fig. 5)
1.
Loosen the depth gauge adjustment knob (2).
2.
Slide the depth gauge rod (1) backward or forward until it is set for
the desired depth. The drilling depth is the distance between the tip
of the bit and the tip of the depth gauge rod.
3.
Tighten the depth gauge adjustment knob securely.
WARNING!
To reduce the risk of injury, wear safety
goggles or glasses with side shields.
Hammering Only
SDS Max Drive System (Cat. No. 5315-21)
When using chisels (or other “hammering-only” accessories) in
the 5315-21 Rotary Hammer, the stop rotation knob MUST be set in
the“hammer-only” setting. The rotational drive mechanism in the
5315-21 engages with the chisel (or other “hammering-only” accessory)
then it is mounted into the tool and the stop rotation knob is set for
“hammering-with-rotation”.
Hammering Only
Spline Drive System (Cat. No. 5319-21 & 5321-21)
When a chisel (or other “hammering-only” accessory) is mounted into
the 5319-21 or 5321-21 Rotary Hammer, the rotational drive mechanism
does not engage with the chisel. The 5321-21 can use chisels in the
“hammering-with-rotation” setting or the “hammering-only” setting.
NOTE:
The 5321-21 Rotary Hammer must be set in the “hammering-only”
setting when setting self-drilling anchors. See “Setting Self-Drilling
Anchors" for complete instructions.
Selecting Speed
These rotary hammers have a speed control dial. The speed control dial
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 for faster penetration when drilling and chiseling
in demolition work.
WARNING!
2
1
Fig. 5
Cat. No.
5315-21
only
1
Fig. 6
3
2
Cat. No.
5315-21
5321-21
Cat. No.
5315-21
5321-21
