Tape measures, calipers, optical comparators, and many more types of measuring tools can be used to make measurements. One of the most notable and accurate tools for measuring is a micrometer. A micrometer is a powerful tool for checking dimensions, but understanding exactly what a micrometer is, what it can be used for, and how to use it is essential to make accurate measurements.
Before measuring, to measure the error, turn the knob directly and stop turning when the click comes out. If the alignment is not zero scale, you need to subtract this part during the measurement process, and then measure, hold the ruler holder with your left hand, turn the knob with your right hand, when a click sound is made to end the rotation, read the length at this time, end.
Current micrometers are classified according to ease of reading, and they can be divided into mechanical micrometers and electronic micrometers. Mechanical micrometer is a more common type, you need to manually read, electronic micrometer can directly display the length of the measured object, eliminating your reading this link
Tape measure, caliper, optical comparator and micrometer are measuring devices used to measure planes or different geometric shapes. For example, the inside diameter or thickness of a pipe. A micrometer is mainly composed of a graduated sleeve, a graduated thimble, a vernierand two surfaces, namely anvil and spindle. The thimble and spindle are connected to a high-precision screw for moving the spindle to a precise and measurable distance
The micrometer is limited in the distance that can be used for measurement. They are usually divided into different measuring range windows.
The three main types of micrometers are:
Use the micrometer carefully, in case you drop it or get hit, check the micrometer immediately.
Before use, the two measuring anvil surface should be wiped clean, rotating force measuring device, so that the two measuring anvil surface contac, the contact surface should be no gap and light leakage phenomenon, at the same time differential cylinder and fixed sleeve simply aligned with zero.
When rotating the force measuring device, the differential cylinder should move freely and flexibly along the fixed sleeve without any clamping and inflexible phenomenon. If the activity is not flexible, it should be sent to the measuring station for timely maintenance.
Once the anvil and spindle are in contact with the part at the same time, the scale of the micrometer can now be read.
There are two main types of micrometer systems: traditional scale systems and digital scale systems. When used together, the measured value of the evaluated component is displayed to the user of the micrometer. To illustrate how to read the traditional proportional system, please see the following example :
Reading method: for the screw exposed to the scale, each case represents 0.5mm, in the case of not reaching the accurate scale line, read the scale on the knob. The scale on the knob for each 0.01mm, is estimated to read 0.001mm.
The use of micrometer is relatively simple, more difficult is its reading, accidentally there will be reading dislocation, so in the use of micrometer, need to master its reading, by measuring a few readings can be skilled.
If long-term preservation and dry without oil, with a cloth coated with anti-rust oil wipe a thin layer of oil, although it may leave oil stains and spots on the alloy measuring surface, but if not used for a long time, this will ensure that your micrometer performance lasting oh.
Do not measure blank or rough surface of the workpiece, as well as rotating or heating workpiece, so as not to damage the measuring surface or get incorrect reading.
It is absolutely not allowed to rotate the differential cylinder to increase the measuring pressure, so that the micro screw is too tight on the surface of the parts, resulting in the deformation of the precision thread due to excessive force, and damage the accuracy of the dial ruler. Sometimes forced rotation differential cylinder, although the connection between differential cylinder and micro screw is not firm, the damage to the precision thread is not serious, but the differential cylinder after slipping, the zero of the dial ruler will cause quality accidents.
