Gauge blocks are precision rectangular blocks of high-grade steel used for direct and accurate measurements where precision is required. They were invented in 1896 and are calibrated using a phenomenon called "wringing" for high precision. Gauge blocks are used to calibrate tools like vernier calipers and micrometers, for angle measurement with a sine bar, and to check gaps between parallel locations or mating parts.

1. GAUGE BLOCK
SUBMITTED BY : MUDASSIR HUSSAIN
2016-BT-MECH-710

2. WHAT IS GAUGE ?
• An instrument that measures and gives a visual display of the amount, level, or
contents of something.

3. GAUGE BLOCK
• Gauge block calibration is one of the oldest high precision calibrations made in
dimensional metrology.
• A gauge block is a precision ground and lapped length measuring standard.
Invented in 1896 by Swedish Mechanist Carl Edward Johansson.
• Gauge Block are rectangular block of high grade steel with close tolerance.

6. WRINGING OF BLOCK GAUGES
The accuracy of measurement depends on the phenomenon of wringing.

9. USES OF GAUGE BLOCKS
• Direct precise measurement where accuracy is required.
• For calibration of Vernier calipers, micrometer etc.
• It is used for angle measurement with sine bar.
• To check gap between parallel locations such as in gap gauges or between 2
mating parts.