Starrett® Gear Tooth Vernier Caliper, Series: 456, 0 to 1-1/4 in Measuring, +/-0.0005 in/ft Accuracy, Graduations: 0.001 in, Measuring System: Imperial, Adjustable Screw Nut, 5-1/2 in H Dimensions

• 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
• Caliper is designed to measure in 0.001 in or 0.02 mm the thickness of gear teeth at the pitch line using the distance from the top of a tooth to the chord
• 10 - 1 diametral pitch

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Starrett_456B_Full_Engineering_Drawing.pdf https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Starrett_456B_Full_Engineering_Drawing.pdf