Page 75 - catalgo33

bencH MIcroMeters

HoW to use for dIrect 673 dIrect-reAdInG bencH MIcroMeters
MeAsure And As A coMpArAtor
0-2"/0-50MM
For direct measuring, the micrometer head is
set to zero and the dial indicator is set to zero The 673 Bench Micrometer is a high precision instrument, ideal for bench use either in a
by the bezel adjustment. Any workpiece within shop environment or inspection laboratory. It can be used as a comparator measuring to
the 2" (50mm) range can then be measured by fifty-millionths of an inch (.000050") or two-thousandths of a mm (0.002mm) or for direct
the micrometer head in ten-thousandths of an measuring to .0001" or 0.002mm. Work lengths up to 2" or 50mm can be measured.
inch (.0001" or 0.002mm). The indicator must • The base is a heavy, rigid casting, incorporating at the left end a movable anvil which
read zero for each measurement. actuates a linear, friction-free motion transfer mechanism between the anvil and the
indicator. This assures high accuracy.
If used as a comparator, first set the head and
the indicator to zero as previously explained. • The large thimble diameter, approximately 3" (77mm), makes possible widely spaced MicroMeters
Then adjust the micrometer head to the desired graduations that are easy to read without a vernier scale reference
dimension to be checked. After retracting the • Advanced, staggered design and quick reading graduations in combination with
anvil, work is placed on the table between anvil Starrett no-glare satin chrome finish on both thimble and sleeve also contribute to
and spindle and the anvil is then released so easier, faster readings
anvil and spindle contact the work. Plus or minus • The head is furnished with a speeder and has a special ring-type lock nut which firmly
deviation from the nominal work size is then holds the spindle at any setting without distortion
read from the dial indicator in fifty-millionths of • Another useful feature is the adjustable work table centered beneath the anvil and
an inch (.000050") or 0.002mm. spindle. Work can be accurately aligned between the anvil and spindle by adjusting
the table to the proper height and locking it in position.
• The spindle and anvil are carbide faced for long life
• To read to ten-millionths of an inch (.000010") or 0.0001mm, this bench micrometer
can be used with both the 776 Electronic Digital Gage Amplifier (LVDT probe 776-2Z)
or on the 717 Analog Amplifier (LVDT probe 715-2Z). Both require 673A adapter.

673 and 673M Direct-Reading Bench Micrometers
Range Graduation
Cat. No. EDP Micrometer Head Dial Indicator Micrometer Head Dial Indicator Work Table
673XZ 67191 0-2" .006" (0-3-0) .0001" .000050" 2-1/4" dia. and 7/8" vertical adjustment
673MXZ 67192 0-50mm 0.2mm (0-10-0) 0.002mm 0.002mm 57mm dia. and 22mm vertical adjustment
673 and 673M Accessories
Cat. No. EDP Description
673A 52891 Adapter for 715-2Z LVDT Length Probe (to connect both 717 and 776 Gage Amplifiers)
776-2Z 68818 LVDT Length Probe (776 Gage Amplifier)
715-2Z 64480 LVDT Length Probe (717 Gage Amplifier)
Anvil Pressure Adjustment – 8 oz. to 3 lb (0.23 to 1.36kg)

673M with 717 amplifier

starrett.com 75