Darex XT-3000A - Manual (Page 60)

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Material Take off Adjustment for SA16401TA (1.5-7mm Chuck):
Calibrating the Material Removal Knob
Mini Attachment
LEX350 & LEX351
Small diameter bits have a high possibility of
breaking if too much pressure is put on them.
For this reason, it is critical to follow all of the
safety warnings in the XT 3000 User’s
Manual. In particular, it is very important to
wear ANSI certified (impact resistant) goggles
when sharpening small bits!
To minimize the risk of breaking bits, burning
them because of too much material take off,
or creating negative relief on the small bit,
the Small Chuck is designed to have a very
small Material Take Off (MTO). It will operate
only at the high end of the Material Take Off
(MTO) adjustment range.
This minimizes
1. At the rear of the machine base, there is
a small access hole.
2. Insert a 5/32 Allen wrench into the
access hole.
3. To retract the pusher shaft cap, increas-
ing the amount of drill stick out, rotate
the wrench counterclockwise.
4. Each 1/4 turn will adjust 0.010”
(0,25mm) or one full turn will adjust
0.040” (1,0mm). After adjusting the
pusher shaft assembly, realign the drill
and remeasure the amount of stick out.
Repeate steps 2-4 until the system
removes approximately 0.005” (0,12mm)
of material from the small drill.
the possibility of a user accidentally trying
to remove 0.015” or 0.025” of material and
ruining a small bit. Because the chuck has
been tuned for low MTO, it is possible that
your XT3000 may be adjusted out of working
range. If a drill bit mounted in the Small
Chuck, and then aligned at maximum MTO
(meaning the MTO knob is fully
counter-clockwise) does not touch the grinding
wheel, then you will need to adjust the
Material Removal knob to allow additional
material take off. Simply follow the instructions
from page 23 of the User’s Manual, which are
partly re-printed below.