Calipers, measuring blocks, level 0, 32 pieces, packaged as genuine Southwest products

Calipers, measuring blocks, level 0, 32 pieces, packaged as genuine Southwest products

The "grade" and "equal" of measuring blocks are two different forms of dividing their accuracy from the perspectives of batch manufacturing and individual verification.

When used according to the "grade", the nominal size marked on the gauge block is used as the working size, which includes its manufacturing error.

When using "wait", the actual size after calibration must be used as the working size, which does not include manufacturing errors but includes measurement errors during calibration.

For the same measuring block, the measurement error during calibration is much smaller than the manufacturing error.

When the measuring block is used as "equal", its accuracy is higher than when used as "grade", and it can extend its service life while maintaining the original accuracy of the measuring block.

Selection of measuring blocks

The national standards jointly stipulate17A complete set of measuring blocks for the series.

When combining measurement blocks, in order to reduce the cumulative error of the measurement block combination, the number of combination blocks should be minimized as much as possible, generally not exceeding4Block.

When selecting measuring blocks, start from the last digit of the required combination size, and subtract at least one last digit of the required size from each selected block.

Micrometer measuring blockThe relationship between equality and level
According to the Chinese Measurement Block Verification Regulations JJG146-2003, it can be seen that the length deviation of K, 0, 1, 2, and 3 level measurement blocks is equivalent to the measurement uncertainty of 1, 2, 3, 4, and 5 level measurement blocks, respectively. Therefore, in the use of measurement blocks, certain "equal" measurement blocks can be replaced with corresponding "grade" measurement blocks. However, this substitution is not economical because the flatness and compatibility requirements of the measurement surface of level 3 measurement blocks are higher than those of level 5 measurement blocks. Therefore, it is only necessary to use the nominal size of the measurement block when it cannot be corrected.
On the other hand, blocks of equal magnitude 3 cannot replace blocks of equal magnitude 1, and blocks of equal magnitude 3, 4, and 5 cannot respectively replace blocks of equal magnitude 1, 2, and 3. This is because blocks of equal magnitude 2, 3, 4, and 5 have lower flatness and conformity of their measuring surfaces compared to blocks of equal magnitude 0, 1, 2, and 3.
From the flatness and compatibility of the measuring block, it can be seen that: 1 grade is equivalent to K grade; Level 2 and Level 0; Grade 3 is similar to Grade 1, Grade 4 is similar to Grade 2, and Grade 5 is similar to Grade 3, so a certain grade of gauge block can only be calibrated from a certain grade of gauge block. For example, measuring blocks with a factory grade of 0 can only be calibrated as 2nd grade or below, measuring blocks with a factory grade of 1 can only be calibrated as 3rd grade or below, and measuring blocks with a factory grade of 2 can only be calibrated as 4th grade or below

gauge blockThe physical picture is as follows:

Gauge block is one of the commonly used measuring tools in industrial production and scientific research, used to detect some high-precision dimensional parameters. The commonly used measuring blocks are 0.5 mm、1mm、2.5mm、5mm、10mm、25mm、50mm、100mm、150mm、200mm、250mm、300mm、500mm、1000mm Waiting for multiple specifications and models. These measuring blocks are mostly made of materials such as quartz, diamond, ceramics, etc., which have high stability and accuracy.

Through the table provided above, one can clearly understand the basic parameter information such as the size, maximum measurement range, and minimum measurement range of various specifications and models of measuring blocks. Among them, the smaller the minimum measurement range value, the higher the accuracy of the measuring block. Therefore, in practical applications, the corresponding measuring block model needs to be selected according to specific needs.

In short, measuring blocks are a commonly used measuring tool, widely used in various fields due to their high accuracy and good repeatability. For fields that require precise measurement, mastering the relevant specifications and parameters of measuring blocks is a very important foundational knowledge.

Calipers, measuring blocks, level 0, 32 pieces, packaged as genuine Southwest products