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Thermo protection
The thermo protection stops the motor when it’s overheated automatically. Afterwards you need to let it run with a
high rotation speed at the idle speed for about two minutes.
How to work with annular cutters (Weldon shank)
Mount Tool Holder AMK 3 in arbor.
Push ejector pin (center pin) through head of annular cutter.
Mounting of ROTABEST cutter according to drawing. The setscrew must be positioned in the center of
the lateral flat side of the Weldon shank. Fix tightly.
First place annular cutter with ejector pin on a marked center or marking.
Spot-drill until the entire cut edge is formed as a circle.
Drilling with ALFRA ROTABEST cutters does not require much expenditure of force.
During the drilling process the cutter should be cooled permanently. Optimal Cooling is possible by
internal cooling with our coolant unit.
Do not stop the motor during the drilling process. After the process draw the cutter back with running
motor.
Remove chips and core after each drilling.
Remove chips with chip-remover. Do not touch with bare hands. Danger of injury!
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