Safety Clutch; Commissioning And Use; Work Instructions; Maintenance And Service - Narex EVP 16 K-2 Original Operating Manual

English

Safety clutch

The safety clutch is activated if the drill becomes jammed or
caught.

Commissioning and use

Any unauthorised use might cause damage to the tool. Therefore
follow these instructions:
- Always use sharp drill bits.
- Load the tool to avoid any significant reduction of speed or
stoppage.
- Always change the speed gear when the machine is idle or at
the machine slow-down at low speed, in no case during the
drilling or when the machine is otherwise loaded.
Check whether the data on the name plate correspond with the
actual power supply voltage. Tools designed for 230 V may be con-
nected also to 220 / 240 V.
Additional handle
For safety reasons always use the enclosed auxiliary handle (9).
Fasten the auxiliary handle to the clamping collar (2) with the wing
bolt (14).
By loosening the wing bolt (15) the drilling depth can be adjusted
with the depth stop adjustment (10).
The auxiliary handle is used to guide the machine securely, espe-
cially with sudden occuring reaction torque (e. g. jamming of the
drill bit).
By loosening the wing bolt (16) the position of the auxiliary
handle can be adjusted in length direction.
Apply the pressure required for work against the han-
dle only and not against the auxiliary handle (9).
Clamping a drill
Insert tool and tighten equally in all 3 holes with chuck key.
Switching on and off
By pressing the switch button (4a) the machine activates and re-
leasing the button stops it.
Permanent run
By pressing the switch button (4a) to the stop and simultaneous
pressing the latching pin (3) permanent run is achieved.
Repeated pressing the switch button (4a) and its release the per-
manent run is discontinued.
Speed control
By light and gradual pressing the controller button (4a) you will
achieve low speed and controlled continuous run-up.
By further gradual pressing the button the speed increases to the
pre-selected speed.
Electronic speed pre-selection
Using the pre-selection wheel (5) the required pre-selected speed
is set–even if the machine runs. The necessary speed depends on
the type of the material drilled, and a practical test is recommend-
ed to verify it.
If the machine is loaded considerably, adjust the pre-selection
wheel (5) to the marginal position in the + direction (max speed
– control disconnected).
After a longer work at low speed leave the machine run idle for
3 minutes at maximum speed to cool the engine down.
Gear shifting
Use the speed lever (7) to adjust the 2nd speed gear:
1. Speed – lower speed gear – higher torque
2. Speed – higher speed gear – lower torque
In any speed gear you can adjust the final speed by means of the
electronic pre - selection. However, firstly select the mechanical
speed gear.
Changing the gears can be done at slowing the machine down or
in idle run but never when the machine is fully loaded. Once the
gear is changed, leave the machine start up slowly.
14
Change in rotation
Adjust the rotation direction switch (4b) to the right (left run) or to
the left (right run). The left run allows e.g. cutting the threads and
unscrewing of bolts or nuts.
Changing is blocked if the controller button is pressed. The rotation
direction has to be changed when the machine is idle.
WARNING! If the left run is used, the chuck has to be
screwed on very firmly.
Drilling and impact drilling
Shift in or out the hammer by the hammer gear button (8). The
shifting can be done even when the machine runs.
Engaging hammer-action:
Press button (8). Push the machine's spindle towards the body of
the drill and rotate the spindle to the right until the button clicks
in place.
Turning off hammer-action:
Push the machine's spindle towards the body of the drill and ro-
tate the spindle to the left until the button releases from the ham-
mer-action position.
Removing the chuck with ring gear
Hold the spindle on the surface (12) using an open wrench (22 mm).
Insert the chuck hook (11) into a single opening on the chuck and
by turning left screw the chuck out. Release the firmly clamped
chuck by impacts of the hammer on the chuck hook (11).

Work instructions

Drill bits
For steel use perfect and sharpened drill bits made of good-quality
high-speed steel.
Drilling stands
For precise drilling on smaller parts, use of a drilling stand is rec-
ommended.
Clamping device
Clamp the worked pieces properly into the screw-type clamping
unit. Thus turning of the piece is avoided, as well as a potential
accident.
Drilling in tiles
Shift the impact gear lever (4) to the drill-bit symbol. Once the
upper layer is drilled through, shift the impact gear lever to the
hammer symbol.
Thread cutting
Clamp the screw tap properly in the chuck using a considerable
power, otherwise it will slide through.

Maintenance and service

Attention! Risk of el. shock. Prior to start any opera-
tion, pull the plug out of the socket!
‰ The vent holes (6) of the engine cover must not get plugged.
‰ After about 100 hours of operation the following works need
to be done:
- Check of the brushes length Brushes shorter than 5 mm must
be replaced with new ones.
‰ After about 200 hours of operation the following works need
to be done:
- Exchange of lubricating grease in the gearbox and bearings.
Attention! With respect to protection from el. shock
and preservation of the class of protection, all mainte-
nance and service operations requesting jig saw case
removal must be performed by the authorized service centre
only!
The current list of authorized service centres can be found at our
website www.narex.cz, section "Service Centres".