Using The Variable Alignment To Adjust Chisel; And Relief Angle - DRILL DOCTOR 500X Mode D'emploi

Using the Variable Alignment to Adjust
the Chisel and Relief Angles
Both Models 500X and 750X enable you to adjust the
Chisel and Relief Angles of your drill bit. The Chisel and
Relief Angles have a direct effect on the performance of
your drill. By increasing the Relief Angle, you can
increase the speed of the drill in softer materials. To
improve the quality of the hole, you can adjust the drill to
be less aggressive. A less-aggressive drill has a lower
Chisel and Relief Angle. Your Drill Doctor enables you to
adjust both angles in one setting.
1.
2.
Alignment
Port
-
+
118
to the (-) position. This will make a more precise hole.
Take care not to adjust the Relief too far as this will actu-
ally cause the drill to lose all Relief and therefore not drill
a hole. Each notch in the Alignment Port is approximately
a 10° change in Chisel Angle.
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Chuck bit as usual
1"
To prepare your bit for this
fine adjustment, follow all
the steps for chucking your
bit given previously in this
User's Guide.
Insert Chuck into
Alignment Port
To adjust the Chisel and
Relief Angles, simply align
the bit as usual with the fol-
lowing adjustment;
To increase Relief—position
the Chuck in the Alignment
Port so that the Alignment
°
Guide is closer to the (+)
position. This will make a
more aggressive drill point.
To
Relief—position the Chuck in
the Alignment Port so that
the Alignment Guide is closer
decrease Chisel and
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