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Aligning Workpiece
with Mill Spindle
There are many ways to align the mounted
workpiece with the mill spindle. Review the sug-
gestions below, then use your best judgment
based on your experience and skills to select the
correct method for your operation.
Items Needed
Dial Indicator with Magnetic Base ..................... 1
Precision Mandrel or Drill Rod .......................... 1
Edge Finder ....................................................... 1
Precision Square ............................................... 1
To align T1243 with mill spindle:
1.
Mount T1243 horizontally on mill table under
spindle (see Mounting Table Horizontally
on Page 9).
2.
Position dial indicator with magnetic base
beside T1243, as shown in Figure 16.
Dial
Indicator
Figure 16. Example of aligning workpiece using
a dial indicator.
3.
Indicate inside or outside of workpiece, then
turn rotary table handwheel while watching
indicator dial.
Note: For accurate indicator results, turn
rotary table handwheel in just one direction
to eliminate any pinion backlash.
-12-
4.
5.
6.
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7.
Aligning Table with
Mill Machine X-Axis
Workpiece
The T1243 should be aligned with the X-axis of
the milling machine. Mount the T1243 vertically
to the mill table using the supplied T-bolts and
hold-down clamps, or with parallel step blocks
and accessory step clamps (not included) (see
Mounting Table Vertically on Page 11).
To vertically mount T1243 to milling machine
tables with T-slots narrower than 5" or wider
than 6
than
clamps (not included).
Items Needed
Dial Indicator ..................................................... 1
Hold-Down Clamps ........................................... 2
Parallel Step Blocks (Not Included) ................... 2
Accessory Step Clamps (Not Included) ............ 2
Adjust workpiece on table until there is zero
runout when table and workpiece are rotated,
then securely clamp workpiece to T1243
table.
Mount dial indicator in mill spindle using a
collet or chuck.
Indicate workpiece key feature, then rotate
mill spindle by hand in just one direction while
watching indicator dial.
Tip: Use a mirror to aid in reading test indica-
tor as it rotates away from you.
Adjust mill table until indicator dial reads zero
runout throughout rotation of spindle.
Note: If your workpiece is large enough, it
may be easier to use an edge finder instead
of a dial indicator.
⁄
" on center, or with T-slots wider
1
2
⁄
", use accessory step blocks and
1
2
Model T1243 (Mfd. Since 02/18)
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