Insize Screw Thread Micrometers (3281-AT1 Series)

Insize Screw Thread Micrometers (3281-AT1 Series) screw thread micrometer is a precision measuring instrument used primarily for measuring the pitch diameter of screw threads. It consists of a C-shaped frame with a spindle that is precisely machined to have a V-shaped anvil and a spindle with a measuring tip. The micrometer works on the principle of the screw and nut mechanism, where the spindle moves through a precisely cut screw thread on the frame when the thimble is rotated.

To use a screw thread micrometer, the anvil is placed on one flank of the screw thread, and the spindle is gently rotated until the measuring tip contacts the opposite flank. The reading is then taken from the calibrated barrel and thimble, which indicate the diameter of the thread at the point of measurement.

These micrometers are crucial in industries such as manufacturing and engineering, where accuracy in thread dimensions is essential for ensuring proper functionality and compatibility of threaded components. They come in various sizes and can measure different types of threads, including metric and imperial, making them versatile tools in precision metrology. Regular calibration and careful handling are necessary to maintain their accuracy and reliability over time.