Using The Drill With Annular Cutters; Blockages Of Chips Or Work Piece Fragments - Revo R322 Original Instructions Manual

OPERATION - USING THE DRILL WITH ANNULAR CUTTERS
Insert the correct pilot pin into the pilot pin hole through the shank of the cutter.
Mount the cutter in the tool holder (arbor) of the machine as described in previous
chapters, ensuring the cutter is secure and correctly fitted.
Position the machine on the work piece ensuring the magnet is on a flat clean ferrous
surface and the work piece is not below the minimum recommended thickness.
Use the pilot pin to align the centre of the cutter to the desired hole position.
Switch on the magnet and physically check the machine is securely adhered to the work
piece.
Once in position, attach the safety strap, if the magnetic adhesion fails for some reason
the safety strap will reduce movement of the machine.
Apply cutting fluid through the small holes in the arbor, the arbor has a small reservoir for
coolant which is fed down through the central pin hole to the cutter. The use of cutting
fluid will enhance the quality of the cut and prolong the life of the cutter.
Lower the safety guard provided.
Switch on the drill motor, feed the cutter down by using the three handles provided.
Proceed with caution, apply pressure gradually until the cutter has formed a groove of
approx 3mm (1/8"). Once a groove is established the pressure can be increased.
DO NOT apply excessive pressure, if excessive pressure is required it is a sign the cutter
may be worn, continuing to use a worn cutter will result in damage to the drill motor.
If the drill motor slows significantly under load ease off the downward pressure.
On deep holes it may be necessary to withdraw the cutter to remove swarf and to apply
more cutting fluid.
A cutter in good condition will need only moderate feed pressure and will produce
continuous chips or swarf. Broken chips or swarf indicate a cutter or material problem, so
care should be taken.
OPERATION - BLOCKAGES OF CHIPS AND WORKPIECE FRAGMENTS
If excessive swarf builds up during the cut it may be necessary to withdraw the cutter to
remove the swarf, care should be taken as the swarf will be both hot and sharp.
As the cutter begins to break through, the feed pressure should be reduced slightly.
When the cutter breaks through, a slug of material at the centre of the cut will be ejected.
This will be both hot and sharp. Care should be taken when handling the slug.
Care should be taken that the ejection slug is safe and can not injure anyone in the
vicinity, the slug should be prevented from falling where possible.
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R322 DRILL - W18XC473 - Revised 231111