A gauge block (also known as a gage block, Johansson gauge, slip gauge, or Jo block) is a precision ground and lapped length block used as a measuring standard. Invented in 1896 by Swedish machinist Carl Edvard Johansson, they are used as a reference for the calibration of measuring equipment used in machine shops, such as micrometers, sine bars, calipers, and dial indicators (when used in an inspection role). Gauge blocks come in sets of blocks of standard lengths. In use, the blocks are stacked end-to-end to make up the desired length. Gauge blocks are the main means of length standardization used by industry.
Read more about Gauge Block: Description, Grades, History, Gauge Pins, Gauge Rollers and Balls
Famous quotes containing the word block:
“When the landscape buckles and jerks around, when a dust column of debris rises from the collapse of a block of buildings on bodies that could have been your own, when the staves of history fall awry and the barrel of time bursts apart, some turn to prayer, some to poetry: words in the memory, a stained book carried close to the body, the notebook scribbled by hand—a center of gravity.”
—Adrienne Rich (b. 1929)