Answer :
Final answer:
A gauge block is typically used to calibrate a micrometer or check its accuracy. It involves using a specific thickness block from a set, known for their precision, to ensure the micrometer provides correct measurements.
Explanation:
The tool generally used to calibrate a micrometer or check its accuracy is a gauge block. Gauge blocks, also known as gage blocks, Johansson gauges, or slip gauges, 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. Gauge blocks come in sets of blocks with a range of standard lengths. In practice, the block chosen should be as close as possible to the size of the object being measured with the micrometer to ensure accuracy.
When calibrating a micrometer, the gauge block is placed between the spindle and the anvil. The micrometer is then closed on the block. If the micrometer reads the known standard length of the block correctly, it is considered to be calibrated accurately. If not, the micrometer needs to be adjusted.
