To obtain maximum life from COMTORGAGE equipment
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Never twist the gage in the work piece or the master,
as this causes needless wear.
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Only a gentle side to side motion is required to
assure full seating of the gage in the work piece
or master. Violent shaking, twisting, or wringing can be harmful
to the gage.
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Do not attempt to insert or remove the gage from
the work piece or the master without depressing the retraction
button fully. This may damage the gage and will cause unnecessary
wear.
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Return the COMTORGAGE for regrinding and recalibrating
when worn or if accidentally damaged. In most cases, when wear is
less than .002", the gage can be reground and recalibrated
to size, thereby greatly increasing its useful life.
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If the amplifier bezel is removed for any reason,
avoid possible damage to the small key on the inside of the bezel
by making sure it is properly seated in the slot that is located
on the edge of the dial face.
COMTORGAGES are
self-compensating for wear
The comparator principle used by COMTORGAGE assures that accuracy
is maintained. Gradual wear at the gaging contact points is reflected
in a gradual progression of "0" to the plus (+) side, as
the dial is kept adjusted to the master. Substantial wear is thus
compensated for without loss of accuracy.
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To disassemble gage for
cleaning and lubrication
- Remove the gage from the amplifier by loosening the four screws
in the back of the amplifier case, rotate the gage
a quarter turn, and withdraw.
- Slide the black calibration sleeve off of the gage stem and remove
the cross pin.
- Withdraw the tapered plunger.
- Clean the disassembled gage with denatured alcohol and dry
with compressed air.
- Lubricate the tapered end of the plunger with a light smear of petroleum
jelly/molybdenum disulfide mixture (1 teaspoon molybdenum disulfide
to 1 lb. petroleum jelly). DO NOT USE GREASE OR MICRO OIL!
- Smear a small amount of petroleum jelly on the upper end of
the plunger where it slides through the guide bushing.
- Insert the plunger back into the expansion plug.
- Align the slot in the plunger with the hole in the gage stem
and insert the cross pin.
- Slide the calibration sleeve onto the gage stem with the scribed
line abutting the calibration pin.
- Insert the gage into the amplifier and rotate a quarter turn.
Tighten the four screws, making sure the calibration sleeve is snug
against the boss of the amplifier.
Gages should be stored in an environmentally controlled area when not
in use. DO NOT store large diameter (3.0000" and above) bore gages
in the "upright" position, as this puts undo pressure on the
critical hinge points.
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