How to use the spiral micrometer, how to use the spiral micrometer

Spiral micrometer, also known as micrometer, spiral micrometer, centimeter card, is a more precise tool than vernier caliper to measure the length, with which the length can be accurately measured, the measurement range is a few centimeters. This ** clearly introduces the use of spiral micrometer.

After unscrewing, put in the thing you want to measure, screw the big nut can be quickly clamped, when it is tight, screw the small nut at the back, and hear a small click sound to indicate that it is tightened, and you can read.

Read the readings on the main ruler first, and then whole the millimeters.

Second, see if there is half a grid on the main ruler, and if so, add millimeters.

Finally, look at the reading on the knob, and the horizontal line in the middle of the main ruler is aligned with a few small squares, just a few times the millimeters. For example, if it is 25 mm, add one piece to the previous one.

There are two steps to the use of the spiral micrometer. The details are as follows: 1. Check the zero point, the operation mode is to slowly turn the protection knob, so that the measuring rod and the measuring sticker are in contact until the ratchet makes a sound, and ensure that the zero engraved line on the movable ruler is aligned with the reference line on the fixed sleeve.

2. Hold the crank in your left hand, turn the big knob with your right hand to make the distance between the measuring rod and the measuring stick slightly larger than the measured object, then put in the measured object, turn the protection knob to clamp the measured object, and after the ratchet makes a sound, turn the fixed knob to fix the measuring rod and make a reading.

Spiral micrometer, also known as micrometer, spiral micrometer, centimeter card, is a more precise tool for measuring length than vernier caliper, with which the length can be measured accurately, and the measurement range is a few centimeters.

The spiral micrometer is made according to the principle of spiral amplification, that is, the screw rotates once in the nut, and the screw moves forward or backward by one pitch along the axis of rotation. Thus, the slightest distance traveled in the direction of the axis can be expressed by a reading on the circumference.

The pitch of the precision thread of the spiral micrometer is that the movable scale has 50 equal parts, the movable scale rotates one time, and the micrometer screw can move forward or backward, so that each small division of rotation is equivalent to the micrometer screw moving forward or backward.

It can be seen that each small division of the movable scale is represented, so the spiral micrometer can be accurate. Because it can also be estimated by one more person, the millimeter can be read, so it is also called a micrometer.

Precautions for use:

1. When measuring, it should be noted that when the micrometer screw is close to the measured object, the knob should be stopped and the fine adjustment knob should be used instead to avoid excessive pressure, which can not only make the measurement results accurate, but also protect the spiral micrometer. When reading, pay attention to whether the notch on the fixed scale indicating half a millimeter has been exposed.

2. When reading, there is an estimated reading number in the thousandth, which cannot be thrown away casually, even if the zero point of the fixed scale is exactly aligned with a certain tick line of the movable scale, the thousandth should also be read as "0".

With 3D animation, you will learn about the inner workings of the spiral micrometer and how it works.

Spiral micrometer reading method:

An axial midline is engraved on the fixed sleeve of the spiral micrometer that serves as a reference line for the differential cylinder readings. The specific reading method of the spiral micrometer can be divided into three steps:

1. Read out the size of the engraved line exposed on the fixed sleeve, and be sure not to miss the engraved line value that should be read.

2. To read the size on the differential cylinder, it is necessary to see which grid on the circumference of the differential cylinder is aligned with the midline datum of the fixed sleeve, and multiply the number of grids by the size on the vested differential cylinder.

3. Add the above two readings together, that is, the size measured on the micrometer.

Tighten the spiral micrometer slowly, if the indication is on the left side of the zero scale, it will be negative, if it is on the right, it will be positive, and subtract the corresponding value when reading after taking the branch.

A tool that is more precise than vernier calipers to measure length, and the length measurement can be used to eliminate sensitivity and accuracy, and the measurement range is a few centimeters. A part of it is machined into a thread with a pitch of the pitch, and when it rotates in the screw sleeve of the fixing casing B, it moves forward or backward, and the movable casing C and the screw rod are connected as a whole, and its periphery is equally divided into 50 sub-grids.

The number of turns of the screw rotation is measured by the engraved lines at intervals on the fixed casing, and the part that is less than one turn is measured by the engraved lines around the movable casing, and the final measurement result needs to be estimated to one decimal place.

A spiral micrometer is an instrument used to accurately measure the diameter, length, and thickness of an object. It is very simple to use, first by placing the measured object on the hidden cavity measuring table, and then moving the spiral micrometer to the top or bottom of the measured object. Next, gently rotate the spiral micrometer until it presses against the surface of the object, at which point the number on the readout plate is the diameter, length, or thickness of the object.

It is important to note that when using a spiral micrometer, it is important to ensure that the instrument and the object to be measured remain level. In addition, for more accurate measurements, measurements can be taken multiple times, with the average value taken as the final result.

When using a spiral micrometer, you also need to pay attention to the reading method. Typically, a spiral micrometer has two verniers on the reading plate, a stationary vernier and a dynamic vernier. To measure, align the stationary cursor to one tick mark and then turn the dynamic cursor until it aligns with the other tick mark.

In this case, the number on the reading disc is the distance between the cursors, i.e. the size of the object being measured.

Further, if a spiral micrometer is required to measure smaller objects, a spiral micrometer with a smaller measuring range can be used. In addition, for measuring irregularly shaped objects, it is possible to obtain more accurate measurement results by measuring different positions multiple times and then averaging them.

In conclusion, the spiral micrometer is a commonly used precision measurement tool, and its use method is simple, but it is necessary to pay attention to the level of the Paup's certificate instrument and the measured object, and use the correct reading method. In the process of use, it is also necessary to choose the appropriate spiral micrometer and measurement method according to the size and shape of the measured object. <>