What is a micrometer and how do I use it?
Speaking of micrometer, for infrequent contact will be relatively unfamiliar, but its use in high school textbooks have taught, sometimes in the college entrance examination also tested the corresponding topics, perhaps you will say, high school textbooks do not have such things as micrometer ah, yes in the high school textbooks it is not mentioned, mentioned is the spiral micrometer, and here the micrometer refers to this, for the spiral micrometer believe that there are A part of people know, I am here to introduce you to its accuracy and its use of some of the problems.
The rotatable knob part of the screw micrometer has 50 compartments, each of which represents a distance of 0.01mm. When the object does not reach the specified scale when it is rotated, it is necessary to estimate the reading by one. When marking its length, it should also be written to the estimated number of digits, that is, to be accurate to 0.001mm, which is also called the origin of the micrometer.
Screw micrometer is also called micrometer, it is a kind of instrument that can accurately measure the length and radius of the object, its accuracy is accurate to 0.01mm, more accurate than the vernier caliper, it consists of a fixed sleeve and rotatable screw, measuring the outside diameter of the object will be put into a slot, no matter how the screw rotates, the screw can not advance, indicating that the length is the exact length of the object.
The rotatable knob part of the screw micrometer has 50 compartments, each of which represents a distance of 0.01mm. When the object does not reach the specified scale when it is rotated, it is necessary to estimate the reading by one. In the mark its length should also be written to estimate the number of bits read, that is, to be accurate to 0.001mm, which is also called the origin of the micrometer.
Reading method: for the screw exposed scale, each frame represents 0.5mm, count out how many frames to calculate the fixed length, and read the scale on the knob when it does not reach the exact scale line. Knob on the scale of 0.01mm per frame, in less than 0.01mm also need you to read the next estimate, is to estimate the reading to 0.001mm.
The use of the micrometer is relatively simple, the more difficult is its reading, accidentally will have the reading of the wrong situation, so when using the micrometer, you need to master its reading, by measuring the number of readings can be skilled.