fillet radius gauge

Accurate measurement : use a caliper or ruler to measure the distance the pin traveled, then multiply it by 2.414 as specified on the gauge. Quick measurement : just count the marks on the pin, the marks are arranged in a 10mm interval (shorter marks are 5mm, just refer to the photo), the number of marks traveled x 10mm is the radius, no need calculator. Feel free to use the radius test cube to test my math lol !! Calculation is as follows :