Description
Allen Gauge and Tool Co.
Model 1228, Dial Buttress Form Gauge, 1″ TPF
Gauge Type: Buttress Tooth Width Gauge, 1 TPF
Thread Type: Buttress Casing 16″Ω~20″, 1″ TPF
Dial Type: 0~5~0, Balanced
Graduation: 0.0005″
Dial Travel: 0.020″
Description: The 1228 is a thread form gauge used to check the tooth thickness of either External or Internal API Buttress Casing in sizes from 16~20″.
It utilizes an anvil with a fixed pin locator on the 10 Degree flank while the moveable point contacts pitch line of the 3 Degree flank for accurate readings.
Product error is determined by first and “zeroing” the indicator on a setting standard.
Due to the differences in thread form, a 1225-B Setting Standard is required for External threads and a 1224-B is needed for Internal threads.
The measurement taken then indicates the deviation from the API Nominal.
