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Starrett 64381 - Range Combinations and Specifications; Micrometer Head and Combination Head Range Charts

Starrett 64381
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12 PKG08804-UM128
ENGLISH
The standard Mic Head has a basic length of 4"
(100mm)which can be lengthened to 6" (150mm). The
dial indicator combination head adds an additional 5"
(127mm) to the range. Listed below are the various
combinations of end rod and extensions to be used with
the micrometer head for range as indicated:
END ROD
(IN)
RANGE WITH
MIC. HEAD (IN)
RANGE WITH
COMB. HEAD (IN)
Head with 2 6-8 11-13
Head with 4 8-10 13-15
Head with 6 10-12 15-17
Head with 8 12-14 17-19
Head with 10 14-16 19-21
Head with 12 16-18 21-23
Head with 12" extension and 2 18-20 23-25
Head with 12" extension and 4 20-22 25-27
Head with 12" extension and 6 22-24 27-29
Head with 12" extension and 8 24-26 29-31
Head with 12" extension and 10 26-28 31-33
Head with 12" extension and 12 28-30 33-35
Head with 24" extension and 2 30-32 35-37
Head with 24" extension and 4 32-34 37-39
Head with 24" extension and 6 34-36 39-41
Head with 24" extension and 8 36-38 41-43
Head with 24" extension and 10 38-40 43-45
Head with 24" extension and 12 40-42 45-47
Head with 12", 24" extension and 2" 42-44 47-49
Head with 12", 24" extension and 4" 44-46 49-51
Head with 12", 24" extension and 6" 46-48 51-53
Head with 12", 24" extension and 8" 48-50 53-55
Head with 12", 24" extension and 10" 50-52 55-57
Head with 12", 24" extension and 12" 52-54 57-59
By the addition of 24" extensions and interchanging the 12" extension you progress
from 54" (59" for the combination head} on through the full range of the tool.

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