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InsIde MIcroMeters

128 coMbInAtIon HeAd WItH InsIde MIcroMeter 128 sets
128CZ
The combination head for inside micrometers combines the precision 6-294"/150-7350MM
of a dial indicator sensor and the linear accuracy of a micrometer.
This combination of indicator and micrometer reduces the need for Each set consists of a satin-
operator "feel" and provides faster readings with increased reliability. chrome micrometer head which
can be used in combination with
This head is interchangeable with the 128 End Rods and any one or more of a series of
extension combinations. rigid, tubular steel measuring
rods to obtain the required length.
For direct measurements, the dial indicator hand and the telltale
MicroMeters hand must both register zero before reading the micrometer. As a The micrometer head is a modification
comparator, the micrometer is first set to the nominal dimension and ±
of our 63, which has a 2" (50mm) range. The head
deviation from zero is read from the dial indicator. The gage should be
has a basic length of 4" (100mm) which can be lengthened to 6"
rocked to obtain a minimum reading on the indicator. Out-of-roundness
(150mm) by means of its measuring range. Besides those listed on the
can also be checked – any variation being shown by the indicator.
For inch-reading tools, the head can be adjusted within a range lead page of this section, the 128 Sets have these additional features:
• For inside measurements from 6-294" (150-7350mm) (longer
of 2". It extends the overall range by an additional 5". The special sizes are also available on special order)
81-138J Jeweled Non-Shock Indicator is graduated .0005", range • Interchangeable tubular steel measuring rods and extension
±.040" and reads 0-40 on both the plus and minus dials. rods are lightweight with extreme rigidity. Rods screw into each
For millimeter-reading tools, the head can be adjusted within a other and seat against hardened ground and lapped surfaces
range of 50mm. This extends the overall range an additional 125mm. necessary for high accuracy. Rod diameter 5/8" (16mm).
The special 81-181J Jeweled Non-Shock Indicator is graduated • Rods are provided with insulated handles to minimize expansion
0.01mm, range ±1mm and reads 0-100mm on both the plus and from hand heat. All rods marked with length
minus dials.
• All rod anvil contacts are hardened and ground
All inside micrometer masters should be used vertically with the • All measuring rod anvil contacts are adjustable (plain extension
shoulder on the indicator end of the head, seated squarely. rods are not adjustable)
• Adjustable, ground steel supporting collars (placed in "V" grooves
when used in the horizontal position)

128 with rod

128 and 128M Combination Head with Inside Micrometer Sets 128
Cat. No. EDP Description
128 64381 Inch-reading combination head with setting master
128M 68117 Millimeter-reading combination head with setting master

128 and 128M Micrometer Head Sets
Range with Movement Range with
Cat. No. EDP Micrometer Head of Screw Grad. Description Combination Head
128AZ 64375 6-78" 2" .001" With (1) 4-6" head, (1) each 2", 4", 6", 8", 10", 12" rods, (1) 12" ext., (2) 24" ext. 11-83"
128BZ 64376 6-150" 2" .001" With (1) 4-6" head, (1) each 2", 4", 6", 8", 10", 12" rods, (1) 12" ext., (5) 24" ext. 11-155"
128CZ 64377 6-294" 2" .001" With (1) 4-6" Head, (1) each 2", 4", 6", 8", 10", 12" rods, (1) 12" ext., (11) 24" ext. 11-299"
With (1) 100-150mm head, (1) ea. 50, 100, 150, 200, 250, 300mm rods, (1) 300mm ext.,
128MAZ 64378 150-1950mm 50mm 0.01mm 300-2100mm
(2) 600mm ext.
With (1) 100-150mm head, (1) ea. 50, 100, 150, 200, 250, 300mm rods, (1) 300mm ext.,
128MBZ 64379 150-3750mm 50mm 0.01mm 300-3900mm
(5) 600mm ext.
With (1) 100-150mm head, (1) ea. 50, 100, 150, 200, 250, 300mm rods, (1) 300mm ext.,
128MCZ 64380 150-7350mm 50mm 0.01mm 300–7500mm
(11) 600mm ext.

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