Grizzly G0643, Руководство пользователя

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Model G0643 21-Bit Line Boring Machine
-19-
Adjusting Drilling
Depth
The drilling depth is precisely adjusted by using
the depth control on top of the headstock column
(see
Figure 21 ). The depth control window shows
the drilling depth in inches, with the last two digits
as decimals.
To adjust the drilling depth of the boring bits:
1.
Loosen the depth locking screw shown in
Figure 21 .
2. Rotate the adjusting knob to bring the depth
control to "0".
3.
Calculate the drilling depth by using the fol-
lowing formula:
A + B – C = Drilling Depth
A = The distance from the bottom of the bor-
ing bit to the workpiece.
B
= The desired depth of the hole to be
drilled.
C =
1
⁄
4
", the distance the boring head lowers
in addition to the setting of the depth
control.
Note:
Use the following case and
Figure 22
for an example of calculating drilling depth.
In this example, the distance from the bot-
tom of the boring bit to the workpiece is 2
1
⁄
4
"
( A ), and the depth of the desired hole in the
workpiece is
1
⁄
2
" (
B
). Thus, the drilling depth
is 2
1
⁄
2
".
Calculation: 2
1
⁄
4
" +
1
⁄
2
" –
1
⁄
4
" = 2
1
⁄
2
"
4. Convert any fraction of the calculated drilling
depth to a 2-place decimal (
1
⁄
2
" in the above
example is converted to 0.50").
5. Set the depth control to the calculated drilling
depth and re-tighten the depth locking screw
to secure the setting.
Note: In the above example, the depth con-
trol would be set so that 2.50 would show in
the dial indicator window.
6. Test the drilling depth setting on a scrap
piece of stock that is the same thickness as
your workpiece. Fine tune the depth control
setting until you are satisfied with the drilling
depth.
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Figure 22.
Example of calculating drilling depth.
adjusting drilling depth
NOTICE
This line boring machine is designed to
drill only wood products. Drilling any other
material may damage the machine and will
void the warranty.
Figure 21. Boring bit depth control.
Adjusting
Knob
Depth
Locking
Screw
Dial Indicator
Window
Current Depth
(in inches)