The coaxiality measuring instrument is suitable for measuring parts with coaxiality requirements such as step shafts, shaft sleeves, and bushings. The coaxiality measuring instrument is used for aligning the two axes of various rotating equipment such as centrifugal pumps, compressors, fans, and generators (also known as wheel alignment). It has the characteristics of reasonable structure, high accuracy, small error, wide applicability, and easy maintenance. It is an ideal specialized measuring tool and widely used in mechanical industries such as petrochemicals, power generation, papermaking, and textiles.

The main purpose of coaxiality measuring instrument is:

1. Precision measurement of roundness, concentricity, circumferential runout, and cross-sectional difference of shaft components

2. Simultaneous precision measurement of outer and inner circle parameters of shaft components

3. Simultaneous precise measurement of multi-point parameters for shaft components

4. Quick measurement, deviation surface, inner and outer circles can be measured simultaneously

Choosing a concentricity measuring instrument requires confirmation of three parts:

1. Standard precision and high precision;

2. Rotating work axis;

3. Gauge specifications and other accessories (gauge bracket, standard lever gauge bracket, side lever gauge bracket, rail end bracket, etc.).

Its usage method:

Adjust the height of the "pressure wheel" according to the size of the tested workpiece, so that the "pressure wheel" can press the tested workpiece with appropriate pressure.

Raise the "pressure wheel" through the "operation handle", place the tested workpiece on the "rotating work axis", and then return the "pressure wheel" to its original position.

Adjust the height of the "gauge holder" and move it so that the micrometer (dial indicator) probe contacts the surface of the measured workpiece, and adjust the dial pointer to zero.

Adjust the "lever gauge" probe to the appropriate position of the measured workpiece and make it contact the surface of the workpiece. Adjust the dial pointer to zero.

Maintenance and upkeep of coaxiality measuring instrument:

（1） All components should be kept clean. If there is small dust, it can be blown away with a balloon; If there are oil stains and fingerprints, please gently wipe them off with cotton yarn.

（2） Concentricity measuring instruments should not be disassembled or assembled by oneself to avoid incomplete instrument performance.

（3） When the concentricity measuring instrument is not in use, it should be covered with a dust cover to prevent contact with dust, and stored in a place that is isolated from moisture to prevent rusting.

（4） To maintain the performance of the concentricity measuring instrument, it is recommended to conduct regular inspections.

The coaxiality measurement display instrument consists of high-precision measurement display instruments, electronic extensometers, and standard testing samples. It has high measurement accuracy and easy operation, and is an ideal equipment for measuring tension, pressure, and coaxiality of universal material testing machines by various levels of metrology departments