MEASURING INSTRUMENTS CATALOG No.E2016
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B-64BMitutoyo operates a policy of continuous improvement that aims to provide the customer with the benet of the latest technological advances.Therefore the company reserves the right to change any or all aspects of any product specication without notice.Optical ParallelsSERIES 157• Designed to inspect parallelism and atness of measuring faces of micrometers. For details, refer to “Quick Guide to Precision Measuring Instruments”. • Each set consists of 4 sizes to aid in testing parallelism at various angular positions of the micrometer spindle.Optical FlatsSERIES 158• Used for inspecting the atness of very at surfaces. For details, refer to “Quick Guide to Precision Measuring Instruments”. 157-903158-118SPECIFICATIONSMetricOrder No.Range of micrometer to be checkedSizes of parallels included in setDiameterFlatnessParallelismRemarks157-9030 - 25mm12.00, 12.12, 12.25, 12.37mmø300.1µm0.2µmFor 25mm157-90425 - 50mm25.00, 25.12, 25.25, 13.37mmFor 50mmSPECIFICATIONSMetricOrder No.ThicknessDiameterFlatness grade158-11712mmø450.2µm158-118ø450.1µm158-11915mmø600.2µm158-120ø600.1µmInchOrder No.ThicknessDiameterFlatness grade158-122.5"1.8".000004"158-124.6"2.4"InchOrder No.Range of micrometer to be checkedSizes of parallels included in setDiameterFlatnessParallelismRemarks157-9010 - 1".5000",.5062", .5125", .5187"ø300.1µm0.2µmFor 25mm157-9021 - 2"1.0000", 1.0062", 1.0125", 1.0187"For 50mm

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