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How to Read a Micrometer Step by Step

Micrometer Overview A micrometer is a precision measuring instrument used to measure small dimensions with high accuracy, often in the range of 0.01 mm or 0.001 inches. components 1. **Frame**: The rigid, C-shaped body that supports the micrometer. 2. **Anvil**: The fixed measuring surface against which the object is placed. 3. **Spindle**: The movable measuring surface that advances towards the anvil. 4. **Sleeve (Barrel)**: The stationary scale marked with measurements. 5. **Thimble**: The rotating part with a scale that moves the spindle. 6. **Ratchet Stop**: Ensures consistent pressure on the spindle. 7. **Lock Nut**: Locks the spindle in place for consistent measurement. Types 1. **Outside Micrometer**: Measures external dimensions like thickness and diameter. 2. **Inside Micrometer**: Measures internal dimensions such as the diameter of holes. 3. **Depth Micrometer**: Measures the depth of holes and recesses. 4. **Digital Micrometer**: Provides electronic readings for higher accuracy and ease of use. Using a Micrometer 1. *Place the object* between the anvil and spindle. 2. *Rotate the thimble* until the spindle contacts the object. 3. *Read the measurement* from the sleeve and thimble scales (or digital display).