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The Starrett 456 Gear Tooth Vernier Caliper is designed to measure in .001" or 0.02mm the thickness of gear teeth at the pitch line (the chordal thickness of the teeth) using the distance from the top of a tooth to the chord. For the same purpose, it can also be used for measuring hobs, form and thread tools, etc. 20-2 Diametric Pitch in Case.
Unit of Measure

Technical Specs

Brands

 N/A Starrett®

Measure Range

 N/A 1 to 14 in

Graduation

 N/A 0.001 in

Accuracy (±)

 N/A 0.0005 in

Country of Origin

 N/A United States of America

Features

Features

 N/A
  • Can be used for measuring hobs, form and thread tools
  • Adjusted independently by screws on the graduated bars
  • Thickness of a tooth at the pitch line is measured by an adjustable jaw after the addendum is set by the adjustable tongue