Working Advice - Würth 5700 106 Serie Manual Del Usuario

OBJ_BUCH-1523-004.book Page 16 Thursday, June 16, 2016 8:15 AM
Switching On and Off
To start the machine, press the On/Off switch 9 and keep it
pressed.
The power light 4 lights up when the On/Off switch 9 is
slightly or completely pressed, and allows the work area to be
illuminated when lighting conditions are insufficient.
To switch off the machine, release the On/Off switch 9.
To save energy, only switch the power tool on when using it.
Adjusting the Speed
The speed of the switched-on power tool can be variably
adjusted, depending on how far the On/Off switch 9 is
pressed.
Light pressure on the On/Off switch 9 results in a low rota-
tional speed. Further pressure on the switch results in an
increase in speed.
Battery Charge-control Indication
The battery charge-control indicator 10 consists of three
green LEDs, and indicates the charge condition of the battery
for a few seconds when the On/Off switch 9 is pressed half-
way or fully.
LED
Continuous lighting 3 x green
Continuous lighting 2 x green
Continuous lighting 1 x green
Flashing light 1 x green
Temperature Dependent Overload
Protection
When using as intended for, the power tool cannot be subject
to overload. When the load is too high or the allowable bat-
tery temperature range is exceeded, the speed is reduced.
The power tool will not run at full speed until reaching the
allowable battery temperature.
Protection Against Deep Discharging
The Lithium-Ion battery is protected against deep discharging.
When the battery is empty, the machine is switched off by
means of a protective circuit: The inserted tool no longer
rotates.
 Apply the power tool to the screw/nut only
when it 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. The maximum torque is achieved
after an impact duration of 6–10 seconds. After this duration,
the tightening torque is increased only minimally.
The impact duration is to be determined for each required
tightening torque. The actually achieved tightening torque is
always to be checked with a torque wrench.
Screw Applications with Hard,
Spring-loaded or Soft Seat
A test in which the achieved torques in an impact series are
measured and transferred to a diagram will produce the
curve of a torque characteristic. The height of the curve corre-
sponds with the maximum reachable torque, and the steep-
ness indicates the duration in which this is achieved.
A torque gradient depends on the following factors:
• Strength properties of the screws/nuts
• Type of backing (washer, disc spring, seal)
Capacity
• Strength properties of the material being screwed/bolted
≥ 2/3
together
≥1/3
• Lubrication conditions at the screw/bolt connection
< 1/3
The following application cases result accordingly:
Reserve
• A hard seat is given for metal-to-metal screw applica-
tions with the use of washers. After a relatively short
impact duration, the maximum torque is reached (steep
characteristic curve). Unnecessary long impact duration
only causes damage to the machine.
• A spring-loaded seat is given for metal-to-metal screw
applications, however with the use of spring washers, disc
springs, studs or screws/nuts with conical seat as well as
when using extensions.
• A soft seat is given for screw applications, e. g., metal
on wood or when using lead washers or fibre washers as
backing.
For a spring-loaded seat as well as for a soft seat, the maxi-
mum tightening torque is lower than for a hard seat. Also, a
clearly longer impact duration is required.

Working Advice

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