A screw gauge is a tool used to measure the dimensions of small objects, such as the diameter or thickness of a thin wire or metal sheet. It’s made of a U-shaped metal frame with a screw that passes through grooves in a hollow cylinder attached to one side of the frame. The screw gauge has several other features, including:
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- Pitch scale: A millimeter scale on the cylinder that’s parallel to the screw’s axis
- Head scale: A scale that divides the head of an arm attached to the screw into 100 segments
- Ratchet: A configuration on the screw head that prevents the user from applying too much pressure
- Pitch scale: A millimeter scale on the cylinder that’s parallel to the screw’s axis
- Stud: A stud attached to the opposite end of the frame, opposite the screw tip
To use a screw gauge, you spin the screw handle to rotate the main scale linearly. The linear flow can then be used to determine the thickness of the metal layer or the diameter of the wire.
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