Gauge blocks (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are a system for producing precision lengths. The individual gauge block is a metal or ceramic block that has been precision ground and lapped to a specific thickness.

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Use the gauge blocks in these sets individually or together to take precise measurements or calibrate your measuring tools. They are often used to mark layouts, align machine components, and check that parts are within tolerance.

Nearly all gauge block length comparisons or length measurements of objects with gauge blocks are made with contact type comparators where a probe tip contacts a surface under an applied force.

Use the Mitutoyo gauge blocks in these sets individually or together to take precise measurements or calibrate your measuring tools. They are often used to mark layouts, align …

Gauge blocks and sets are commonly stacked together to make a desired length. Rectangular gauge blocks, also known as Jo blocks, are made of metal or ceramic. They have two opposing faces that are ground flat at an exact distance apart.

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Sep 17, 2024 · In this episode of the Metrology Training Lab series by Mitutoyo, we learn how to calibrate gage blocks, stacking or wringing gauge blocks and a brief history. These simple little blocks are something special.