Mammooth M.DC.T.IW.20.500, Manual

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13
EN
Before any work on the power tool (e.g., maintenance, tool change, etc.) as well as
during transport and storage, set the rotational direction switch to the center posi -
tion. Unintentional actuation of the On/Off switch can lead to injuries.
STARTING OPERATION
Inserting the Battery
Use only original this brand Li-ion batteries with the voltage listed on the nameplate
of your power tool. Using other batteries can lead to injuries and pose a fire hazard.
Set the rotational direction switch to the center position to protect the power tool
against accidental starting. Insert the charged battery into the handle so that it can
be felt to engage and faces flush against the handle.
Reversing the Rotational Direction
The rotational direction switch is used to reverse the rotational direction of the
machine. However, this is not possible with the On/Off switch actuated.
Right Rotation: For driving in screws and tightening nuts, press the rotational direc -
tion switch through to the left stop. Left Rotation: For loosening and unscrewing
screws and nuts, press the rotational direction switch through to the right stop.
Switching On and Off
To start the machine, press the On/Off switch and keep it pressed. To switch off the
machine, release the On/Off switch.
Adjusting the Speed
The speed of the switched on power tool can be variably adjusted, depending on how
far the On/Off switch is pressed. Light pressure on the On/Off switch results in a low
rotational speed. Further pressure on the switch results in an increase in speed.
Working Advice
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 the 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. When
working with an application tool, pay attention that the application tool is firmly
seated on the tool holder. When the application tool is not firmly connected with the
tool holder, it can come loose again and not be controlled.
Screw Applications with Hard, Spring-loaded or Soft Seat
When in a test, the achieved torques in an impact series are measured and trans -
ferred into a diagram, resulting in the curve of a torque characteristic. The height of
the curve corresponds with the maximum reachable torque, and the steepness
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 and seal)
• Strength properties of the material being screwed/bolted together
• Lubrication conditions at the screw/bolt connection
The following application cases result accordingly:
• A hard seat is given for metal-to-metal screw applications with the use of washers.
After 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.