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Model D3207
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�
O
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OF
F
Magnetic Base with
Dial Indictor
This Dial Indicator set features a 0.001" resolution, 1" range, and a 2" easy-to-read dial. The indicator is
supplied with a decade counter, adjustable markers, and a dial face lock. The magnetic base features
an ON/OFF knob, both tubular and flat mounting, a stout column, fine-tune adjustment knob, and 2
positioning joints. This tool will allow you to accurately and quickly measure runout, lead, and motion.
Familiarize yourself with the component names to get optimum use out of this tool.
2
1
3
6
4
5
Figure 1. Indicator components.
1. The Adjustable Marker (XD3207001) adjust
along the circumference of the dial.
2. The Dial Lock Knob (XD3207002) secures
the dial face after being rotated around the
indicator body.
7
8
14
9
13
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10
Figure 2. Magnetic base components.
8. The Lock Knobs (XD3207008) secure the
mounting assembly after adjustments are
made.
9. The Indicator Mounting Stud (XD3207009)
fastens indicator to the boom.
3. On the scale, the distance between the
10. The ON/OFF dial for the magnet.
lines equals 0.001" (one thousandths of an
inch).
11. The Magnetic Base (XD3207011) has one
mounting surface on the back and one on
4. The primary numbers represent 0.010" (ten
thousandths of an inch).
5. The Contact Point (XD3207005) touches the
surface to be measured.
6. Each number on the decade counter repre-
sents one full rotation of the needle and is
equal to 0.100" (one hundred thousandths of
the bottom.
12. The Fine-tune Adjustment Knob (XD3207012)
allows the indicator to be adjusted in small
increments.
13. One of two Pivot Joints (XD3207013) that
allows articulation of the mounting assembly.
an inch).
7. The Column Supports (XD3207007) the
mounting assembly.
14. The boom (XD3207014) supports the mount-
ing assembly.
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D3207 Magnetic Base with Dial Indicator
Dial IndicatorMagnetic Base
The magnetic base supports the column and the
mounting assembly. To assemble the column to
the base:
1. Locate the flat washer in the package con-
taining the column/mounting assembly and
attach the washer to the threaded end of
the column.
2. Thread the column into the threaded hole
on the top of the magnetic base until it
stops turning.
3. Finish tightening the column by turning the
jam nut with an
11
⁄16" wrench.
The indicator must be secured to the base prior
to use. Please refer to Figure 4 while reading
these instructions.
1. Loosen the lock knob that secures the
mounting stud to the boom and remove the
stud.
2. Unscrew and remove the knurled nut and
flat washer from the mounting stud, and
insert the threaded end of the stud into the
flange on the back of the dial indicator.
The stud can be inserted from the left- or the
right-hand side, depending on your mounting
needs.
3. Attach the washer and thread the knurled
nut back onto the threads on the stud.
Insert the plain end of the stud into the
pivot joint. Be mindful that this pivot joint
has 2 holes and only one is sized correctly
for the stud. Also, it may be necessary to
rotate the sleeve on the pivot joint to correctly align the parts so the stud can be
inserted.
Figure 3. Mounting the column.
4. Tighten the lock knob for the pivot joint.
5. Tighten the knurled nut with a flat blade
screwdriver to lock the dial into place.
Figure 4. Mounting the indicator onto the
mounting stud
.
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90˚
0.001 ''-1 .0”
�
D3207 Magnetic Base with Dial Indicator
Basic Operations
The dial indicator can be used in many ways and
the magnetic base can be positioned on flat or
round surfaces. The list below gives guidelines
for use:
1. Use the ON/OFF switch on the magnetic
base whenever moving the unit to help
avoid marring the surface that it is resting on and to prevent sudden jarring which
could damage the internal components of
the indicator.
2. Make adjustments to the support assembly
only with the base magnetically secured to
a steel or iron object. This will help guard
against damage to the indicator should the
base fall.
3. Loosen the lock knobs to adjust the height
and angle of the support boom. Trying to
defeat the locks to move the indicator a
small amount will cause premature wear on
the system.
Adjusting the Assembly
The bottom of the magnetic base is notched to
allow for mounting to curved surfaces as well as
having a ground, flat surface. The back of the
base is ground flat for mounting as well.
must be taken to secure the base to a suitable
surface. Hanging the base upside-down or from
the side of a machine may cause the unit to fall.
Also, sheet metal may not have the mass needed
to properly support the unit. Dropping the dial
indicator will reduce its accuracy and may make
it unusable.
Care
4. Gently, try to rock the base after turning
the switch to the ON position to ensure that
the setup is secure.
Figure 5. The support assembly can be posi-
tioned in any fashion by loosening the 2
joints.
pivot
Figure 6. The indicator can be oriented in any
direction by loosening the mounting stud, loosening the
boom and raising the boom along the
column.
Fine-tune Adjustment
Figure 7. Fine tuning the dial to read zero or
any other reference point is made easy with
the fine-tune adjustment knob.
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0. 00 1' '- 1. 0”
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0.001'' -1.0 ”
�
D3207 Magnetic Base with Dial Indicator
Setting the Contact Point
One of the most important setup issues with a
dial indicator is to make sure the contact point
is perpendicular to its expected motion or to
the motion of the object to be tested. Failure
to ensure proper setup will result in an error in
measurement. Please refer to Figures 7 and 8
.
Dial Lock
Loosening the dial lock allows the dial face to
be rotated. This can be helpful when an abso
lute measurement is desired and changing the
adjustments to the
column, boom and fine
adjustment knob are difficult or impractical. In
Figure 9, the dial face has been rotated.
0.400"
0.017"
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Figure 8. The indicator is positioned perpen-
dicular to the axis of a round bar. When the
bar is turned, the runout or lateral motion is
indicated by motion of the needle.
Another important note about setup is that the
contact point must be resting against the part
before any change can be indicated. It is there
fore necessary to adjust the unit so the needle
has moved to ensure a proper measurement.
Use the fine-tune adjustment knob illustrated
in Figure 7.
Adjustable Markers
The dial indicator can also be set up to be used
as a range tester. There are 2 adjustable mark
ers that can be positioned on the dial face. A
range can then be checked. In Figure 9, the
adjustable markers have been set to measure
between 0.030" and 0.065". Again, if a larger
range than 0.100" is needed, the revolutions of
the pointer on the smaller dial will have to be
counted.
COPY RIGHT © NOVEMBER, 2005 BY WOOD STOCK INTERNATIONAL, INC.
WARNING: NO PORTION OF THIS MANUA L MA Y BE REPRO DU CED IN A NY S HA PE O R FO RM WIT HOUT
THE WRITTEN APPROVA L OF WOODS TOCK I NTERNATIO NA L, I NC.
Figure 9. The dial reads 0.417".
The dial indicator is calibrated to read 0.001"
and has a range of 1". When the contact point is
not touching anything, the pointers for each dial
will read “under” the zero inch mark.
-
It is important to understand that the point
ers rotate in opposite directions as the
contact
-
point is depressed. The pointer for the large dial
rotates clockwise and the pointer for the smaller
dial rotates counterclockwise when the
contact
point is depressed. You must keep track of the
number of revolutions for the smaller dial! The
first revolution is indicated by the numbers on
the outer ring of the numbers and the second
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revolution is indicated by the innermost num
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bers. The example in Figure 9 indicates 0.417".
As with the decade counter, the main dial has
a second set of numbers. These can be used to
keep track of the actual motion of the contact
point when it is released.
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