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SERIES 157 – Optical Parallels
• Designed to inspect parallelism and flatness of micrometer measuring faces. (See Quick Guide to
Micrometers at the end of this section.)
• Each set consists of 4 sizes to aid in testing parallelism at various angular positions of the micrometer
spindle.
B
157-903
SPECIFICATIONS
Metric
Code No. Range of micrometer Sizes of parallels included Diameter Flatness Parallelism Remarks Price
157-903 to be checked in set 323.00
157-904 0-25 mm For 25 mm 548.00
Inch 12.00, 12.12, 12.25, 30 0.1 µm 0.2 µm
25-50 mm 12.37 mm Price
For 50 mm 323.00
25.00, 25.12, 25.25, 548.00
13.37 mm
Code No. Range of micrometer Sizes of parallels included Diameter Flatness Parallelism Remarks
157-901 to be checked in set For 1"
157-902 For 2"
0-1" .5000",.5062", .5125",
1-2" .5187"
1.0000", 1.0062", 1.0125", 30 0.1 µm 0.2 µm
1.0187"
SERIES 158 – Optical Flats
• Used for inspecting the flatness of very flat surfaces. (See Quick Guide to Micrometers at the end of this
section.)
158-118
SPECIFICATIONS Inch
Metric
Code No. Thickness Diameter Flatness Price Code No. Thickness Diameter Flatness Price
12 mm 45 grade grade
158-117 15 mm 60 0.2 µm 231.00 158-122 .5" 1.8" .000004" 249.00
158-118 0.1 µm 249.00 158-124 .6" 2.4" 330.00
158-119 0.2 µm 294.00
158-120 0.1 µm 330.00
Mitutoyo operates a policy of continuous improvement that aims to provide the customer with the benefit of the latest technological advances. B-70
Therefore the company reserves the right to change any or all aspects of any product specification without notice.
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