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INTERNAL
BORES AND GROOVES |
| Only with the MTG System can
a bore diameter, internal groove diameter, and their concentricity to each
other be measured with a single gage and set-up. This capability is due
to the "MTG SQUARING PLATE" accessory. Four different squaring plates are
available. All plates are slotted through their centers permitting the use
of all our internal fingers. Squaring plate arms are adjustable for length
so the reach of the fingers into any bore can be set to the desired dimension.
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CHECKING THE BORE
Banking the workpiece against the squaring plate keeps the workpiece
straight, so it is necessary to rock it in only one plane to find the high
point of the diameter. The squaring plate may be moved in or out to permit
gaging at any depth.
CHECKING THE GROOVE
After bores have been inspected for diameter, the gage is quickly reset
to groove diameter and the squaring plate moved to a point that sets the
fingers for groove location. Next, reset the indicator, then proceed with
gaging.
CHECKING CONCENTRICITY
With the gage still set for groove diameter, rotate two eccentric pins mounted
in the squaring plate. Slide the plate until the pins bear down against
the bore, taking the stationary finger out of contact with the groove. Since
the upper finger is now reading the groove while the eccentric pins are
reading the bore, rotation of the workpiece will cause the indicator to
show any runout between the two diameters. |
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