Digital micrometer least count

What is a Micrometer screw gauge? The Micrometer screw gauge is a measuring device that works on the principle of a screw. When the screw is rotated the spindle moves precisely back and forth to measure the workpiece. The micrometer screw gauge is used for measuring the diameters of wires, the thickness and of a workpiece, and much more. It is widely used in the mechanical engineering field, in the tool room of workshops and metrology labs. The micrometer has a least count of 0.01mm or 0.001cm. Parts of micrometer screw gauge • Frame • Sleeve • Anvil • Thimble • Spindle • Ratchet • Locking screw Image credits – Frame The C-shaped metal part of the screw gauge micrometer is known as the frame. It supports the anvil to the left and the sleeve & spindle to the right. Anvil The anvil is a small fixed part on the left end of the frame. Its face is parallel to the face of the spindle. Since it comes in contact with the workpiece it is machined to achieve a high surface finish for better precision. Spindle The spindle has external Info: Both the anvil and the spindle end have flat highly machined surfaces parallel to each other. Also, they come in contact with the workpiece every time measurement is performed. Hence, they are highly prone to wear and thus error in measurement. That is why both spindle and anvil have Tungsten Carbide ends in order to prevent wear. Sleeve/Barrel A sleeve is connected to the right-hand part of the frame. The spindle can move to and fro inside it. Th...