3M 14253 Original Instructions Manual page 18

To switch off the power tool, release the on/off switch (3); or, if the switch is locked, briefly push the
on/off switch (3) backward and down and then release it.
Always check abrasive tools before using them. The abrasive tool must be fitted properly and be
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able to move freely. Carry out a test run for at least one minute with no load. Do not use abrasive
tools that are damaged, run untrue or vibrate during use. Damaged abrasive tools can burst apart
and cause injuries.
Restart protection
English
The restart protection feature prevents the power tool from uncontrolled starting after the power supply
to it has been interrupted.
To restart the tool, set the on/off switch (3) to the off position and then switch the power tool on again.
Starting current limitation
The electronic starting current limitation feature restricts the power of the power tool when it is switched
on and enables operation using a 16 A fuse.
Note: If the power tool runs at full speed immediately after being switched on, this means that the start-
ing current limitation and restarting protection mechanisms have failed. The power tool should be sent
immediately to an after-sales service.
Kickback stop
English
If there is a sudden kickback in the power tool, e.g. jamming in a separating cut, the power supply to the
motor will be interrupted electronically.
To restart the tool, set the On/Off switch (3) to the "off" position and then switch the power tool on
again.
Constant Electronic control
The Constant Electronic keeps the speed at no load and under load virtually consistent, guaranteeing
uniform performance.
Speed preselection
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(14281, 14291)
You can preselect the required speed using the speed preselection thumbwheel (4), even during opera-
tion. The information in the table below describes the recommended values.
Material Application
Metal Removing paint
Wood, metal Brushing, removing rust
Metal, stone Grinding
Metal Rough grinding
Metal Cutting
Stone Cutting
The values specified for speed levels are guide values.
The rated speed of the accessory must be at least equal to the maximum speed marked on the
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power tool. Accessories running faster than their rated speed can break and fly apart.
Pull the plug out of the socket before carrying out any work on the power tool.
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Exercise caution when cutting slots in structural walls; see the "Information on structural design"
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section.
Clamp the workpiece if it is not secure under its own weight.
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Do not load the power tool so heavily that it comes to a stop.
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If the power tool has been subjected to a heavy load, continue to run it at no-load for several
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minutes to cool down the accessory.
Do not use the power tool with a cut-off stand.
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18 | English
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Application tool
Abrasive disc
Cup brush, abrasive disc
Grinding disc
Grinding disc
Cutting disc
Diamond cutting disc and
cutting guide (cutting of
stone is permitted only
with a cutting guide)
Working Advice
Thumbwheel position
2 − 3
3
4 − 6
6
6
6
English
1 609 92A 6BB • 16.3.21