Universal Optical Drill Grinder
Operator's Manual Issue 06/01 Rev 02
19
Grinding left-hand drills
This section describes how to grind left-hand drills on the machine.
Aligning the cutting edge for left-hand
drills
Align the cutting edge as for right-hand drills. At the
same time,
raise
the swivel arm against the stop for
the primary cutting angle.
Caution: On drills cut for the first time with a 4-facet
grind, move the drill away from the sapphire lens with
the swivel arm raised.
Point splitting on left-hand drills
The point splitting grinding wheel is
automatically switched on when the
swivel arm is moved to the right.
-
Grip swivel arm
-
Move swivel arm to right to the stop
Point splitting grinding wheel switches on
automatically
-
Move grinding spindle against drill
Drill is ground
-
Move grinding spindle away from drill
-
Indexing
-
Move collet holder forwards
-
Turn collet holder through
180° (2-lip drills)
120° (3-lip drills)
-
Allow collet holder to latch
-
Split point of second cutting edge as described
above
Changing over for special drills
