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wORking wiTh TwiST dRiLLS
• The drill chuck with Weldon shank is only to be used with twist drills up to a diameter of 13 mm.
• Insert drill chuck with adaptor in the drill spindle.
• Insert twist drill in drill chuck and tighten.
mAinTEnAncE And inSpEcTiOn
The user is obliged to maintain and service the core drilling machine in compliance with the specifications
in the operating manual and according to the country-specific standards and regulations.
The maintenance intervals are classified according to the frequency with which the maintenance should
be carried out.
Always disconnect the machine from the mains before any maintenance operation and repairs,
!
otherwise there is a risk of injury due to unintentional machine switch-on.
Before every use...
• inspect the core drilling machine and underside of the magnet for visible signs of damage
• clean the surface of the work piece and the underside of the magnet
• check the correct, firm fit of the core drill
• check connection cables for damage
weekly...
• use dry compressed air to blow the motor compartment out from the outside
monthly...
• check the markings and labelling on the core drilling machine for legibility and damage.
Replace them if necessary
• clean all the sliding surfaces regularly, re-lubricate them and set the pre-tension of the slide
Annually...
• replace the gear oil or gear grease
• replace the carbon brushes after about 250 operating hours
Maintenance, testing and repair work may only be carried out by qualified electricians according
to the regulations valid in the respective country.
!
Only use original ALFRA spare parts.
View our detailed spare parts list at the end of this operating manual.
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