DR. BENDER 102165, Operating Manual

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5.4 Drill bits
You can use any drill bit with a connection thread of 1 ¼“ UNC or with a four-hole flange. Only use drill bits
that are suitable for the stone type. Using only concentric drill bits that are not deformed prolongs the
service life of the drive unit. Ensure that the diamond segments have an adequate undercut in relation to
the drill bits.
6.0 Safety instructions
Attention
The units must be attended when in use. Disconnect the mains plug and check
that the switch is disabled,
- when the units remain unattended
- during assembly and disassembly
- during voltage drop (rated voltage 400 V 3~ under 340 V), (rated voltage 230 V 1~ under 200 V),
- if the mains voltage fluctuates (phase imbalance) or during interruption of a phase (phase failure),
- when adjusting or fitting an accessory.
Switch the machine off when you stop operation for any reason. This prevents the unit from suddenly
starting while unattended.
Do not use the unit if,
- a part of the housing is missing or defective,
- There is damage to switches, lines, or plug connections (daily inspection!)
- when operating the units, cooling water must not penetrate the electrical components in whichever
location the units are used.
- If water is dripping from the unit, stop work and take the unit to an authorised service centre.
- After a break in operation, only switch on again if the saw blade or drill bit can rotate freely.
- Check the work area with a pipe detector in order to avoid cutting into electrical cables, water pipes
or gas pipes etc.