English
Strength class*
4.8
Thread diameter
M14
60
M16
92
M18
126
M20
178
M22
240
M24
310
M27
455
M30
615
* Strength classes of screws and nuts according to ISO 898-1 stand-
ard
The required time of tightening may be estimated according
to the following scheme:
Based on the type of tightened parts, each combination of materi-
als must be tested separately. The effect of impact action exceed-
ing 10 seconds has no influence on the increase of the tightening
torque.
Screws of smaller sizes may be tightened at soft joint only,
whereas the tightening time may be even shorter than 1 sec-
ond. The impact action time should not exceed 2–3 seconds
in these cases.
While loosening screw joints (rusty screws etc.) even the max.
impact action time (10 seconds) may not be sufficient enough. In
such a case the impact mechanism should be allowed to act on and
off at cycles of about 10 seconds of impact action/ 10 seconds of
idle run to let the machine cool down.
16
5.6
5.8
6.8
8.8
9.8
65
79
95
130
152
98
122
147
196
232
135
168
202
270
×
190
238
286
385
×
255
320
385
×
×
325
410
490
×
×
480
605
725
×
×
650
820
×
×
×
Maintenance
10.9
Air vents (4) shall not be clogged.
180
Cord replacement may be only carried out in professional elec-
trical workshops by authorized and skilled personnel.
×
After about 200 operating hours the following works must be
×
performed:
Check of brush length. Brushes shorter than 5 mm must be
×
replaced.
×
Replacement of lubricant grease in gearbox and bearings.
×
To maintain the rated protection class the machine must be
regularly checked in professional electrical workshop by
×
skilled personnel.
×
Storage
Packed appliance may be stored in dry, unheated storage place
with temperature not lower than -5°C.
Unpacked appliance should be stored only in dry storage place
with temperature not lower than +5°C with exclusion of all sudden
temperature changes.
Environmental protection
Power tools, accessories and packaging should be sorted for envi-
ronmental-friendly recycling.
Only for EU countries:
Do not dispose of power tools into household waste!
According to the European Directive 2002/96/EC on waste electri-
cal and electronic equipment and its incorporation into national
law, power tools that are no longer suitable for must be separately
collected and sent for recovery in an environmental-friendly man-
ner.
Warranty
Our equipment is under warranty for at least 12 months with re-
gard to material or production faults in accordance with national
legislation. In the EU countries, the warranty period for exclusively
private use is 24 months (an invoice or delivery note is required as
proof of purchase).
Damage resulting from, in particular, normal wear and tear, over-
loading, improper handling, or caused by the user or other dam-
age caused by not following the operating instructions, or any
fault acknowledged at the time of purchase, is not covered by the
warranty.
Complaints will only be acknowledged if the equipment has not
been dismantled before being sent back to the suppliers or to an
authorised NAREX customer support workshop. Store the operat-
ing instructions, safety notes, spare parts list and proof of purchase
in a safe place. In addition, the manufacturer's current warranty
conditions apply.