html-Catalog Mitutoyo 2017 - 2019

3-Wire Measuring Process

Series 313 This three-wire measuring process is one of the most precise procedures for determining the pitch diameter of threads. It offers you the following benefits: – The measuring wires are hardened and precision-lapped. – They are placed onto the spindle and anvil of an outside micrometer, allowing you to measure the pitch diameter of threads.

Specifications Accuracy wires

DIN 2269, Grade 1

Tolerance wires ±1 µm Contents

18 pairs of wires ø 0,17 mm up to ø 3200 mm

Delivered

Sets including wooden box

313-101

1) Wire in set No.

Spindle diameter [mm]

6,35

313-101 313-102

8

Individual wires (content of 313-101) One pair, support spindle ø 6,35 mm No. Measuring wire ø [mm] 952131 0,17 952132 0,195 952133 0,22 952134 0,25 952135 0,29 952136 0,335 952137 0,39 952138 0,455 952139 0,53 952140 0,62 952141 0,725 952142 0,895 952143 1,1 952144 1,35 952145 1,65 952146 2,05 952147 2,55 952148 3,2 Individual wires (content of 313-102) One pair, support spindle ø 8 mm No. Measuring wire ø [mm] 952149 0,17 952150 0,195 952151 0,22 952152 0,25 952153 0,29 952154 0,335 952155 0,39 952156 0,455 952157 0,53 952158 0,62 952159 0,725 952160 0,895 952161 1,1 952162 1,35 952163 1,65 952164 2,05 952165 2,55 952166 3,2

P =thread pitch d D

d

=measuring wire Ø

a

a

d =pitch diameter M =theoretical dimension at measuring pressure d a =pitch angle d =correction factor 2

a

a

d

p

97

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