Practical Advice - stayer IS L20 Manual De Instrucciones

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Tightening torque setting
IWB 1024
You can adjust the speed of the power tool when it is on
by pressing in the on/off switch to varying extents. A light
pressure on the on/off switch results in a low rota-tional
speed. Increased pressure on the switch causes an in-
crease in speed.
Selection RPM, min-1 IPM, min-1
1 0-900
2 0-1400
3 0-1750
IS L20: The speed of the switched-on power tool can be
variably ad justed, depending on how far the On/Off switch
is pressed.
Light pressure on the On/Off switc results in a low
rotational speed. Further pressure on the switch results in
an increase in speed.
W L20: In addition to the progressive trigger regulation,
this tool adds a tightening torque limit which can be set
using the switch located over the battery, the following
table shows the available tightening limits:
Selección RPM, min-1 IPM, min-1
1 0-1500
2 0-1700
3 0-1900
4 0-2000
5 0-2300
Reference Values for Maximum Screw/Bolt Tightening
Torques IW 500D
Calculated from the tensional cross-section; utilization of
the yield point 90 % (with friction coefficient μtotal = 0.12).
As a control measure, always check the tightening torque
with a torque wrench.
Nut size
M10-M12
M12-M16
M14-M16
M18-M24

5. Practical advice

Only apply the power tool to the screw/nut when the
tool is switched off. Rotating tool inserts can slip off.
The torque depends on the impact duration. The maximum
achieved torque results from the sum of all individual
torques achieved through impact. Maximum torque is
achieved after an impact duration of 6–10 seconds.
After this duration, the tightening torque increases only
minimally. The impact duration is to be determined for
each required tightening torque. The tightening torque
actually achieved should always be checked with a torque
wrench.
Máx. par, Nm
0-1000 600
0-1800 800
0-2100 1000
Máx. par, Nm
0-2200 100
0-2350 150
0-2650 200
0-2750 300
0-3200 400
Nm
40-80
100-200
120-200
200-350
ENGLISH
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Screw applications with hard, spring-loaded or soft
seats.
When the achieved torques in an impact series are
measured during a test and transferred onto a diagram,
the result is the curve of a torque characteristic. The height
of the curve cor-responds to the maximum achievable
torque, and the steep-ness indicates the duration in which
this is achieved.
A torque characteristic depends on the following factors:
- Strength properties of the screws/nuts.
- Type of backing (washer, disc spring, seal)
- Strength properties of the material being screwed/bolted
together
- Lubrication conditions at the screw/bolt connection
Consequently, the following applies in each case:
- A hard seat is used for metal-to-metal screw applications
that use washers. After a relatively short impact duration,
the maximum torque is achieved (steep characteristic
curve). An unnecessarily long impact duration only
causes damage to the machine.
- A spring-loaded seat is used for metal-to-metal screw
applications that use spring washers, disc springs, studs
or screws/nuts with conical seats. It is also called a
spring-loaded seat when extensions are used.
- A soft seat is used for screw applications of e.g. metal
on wood or screw applications that use lead washers or
fibre washers as backing.
Guide values for maximum screw tightening torques
Figures given in Nm; calculated from the tensional cross-
section; utilisation of the yield point: 90% (with friction
coefficient µtotal = 0.12). As a control measure, always
check the tightening torque with a torque wrench.
Tips
Before screwing larger, longer screws into hard materials,
it is advisable to pre-drill a pilot hole with the core diameter
of the thread to approx. 2/3 of the screw length.
Note: Ensure that no metal particles enter the power tool.
After working at a low speed for an extended period, you
should operate the power tool at the maximum speed for
ap-proximately three minutes without load to cool it down.
Recommendations for optimal handling of the battery
Protect the battery against moisture and water.
Only store the battery within a temperature range of -20 to
50 °C. Do not leave the battery in your car in the summer,
for example.
A significantly reduced operating time after charging
indicates that the battery has deteriorated and must be
replaced. Follow the instructions on correct disposal.
Belt clip
You can use the belt clip to hang the power tool on a belt,
for example. You then have both hands free and the power
tool is always at hand.
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