Then lathe processing needs: vernier card, thousand-minute card depth gauge and so on, which may be more demanding and need to be measured in meters.

Then heat treatment: measure whether the hardness distorts the internal structure.

Polishing: Measure the dimensional smoothness with a meter and check the roundness of the vertical difference in parallel.

Assembly: dimensional measurement of finished products. It seems that traveling ball bearings still require vibration and noise.

Cjz- 1a magnetometer

Cjz- 1a magnetometer is a special measuring instrument for bearing remanence inspection, which is mainly used for sampling inspection of finished bearings and production line parts. The instrument has two main measuring ranges, lmt and 2mt, which are used to detect the qualification of remanence. The instrument also has a large range of 10mt, which is used to check the remanence value of non-demagnetized bearings.

The calibration of the instrument is carried out in the uniform magnetic field of the standard solenoid coil, and the standard is transmitted by the Bureau of Metrology, so the calibration accuracy and uniformity are good. The lmt calibration magnetic field of the instrument itself is also a solenoid coil with a polarity switch, which can be used to correct the measurement error of the instrument to N S pole.

The instrument is also equipped with an out-of-tolerance signal device. After selecting the appropriate out-of-tolerance limit, if the measured value exceeds this limit, the instrument will give out sound and visual instructions to detect out-of-tolerance products in time.

The probe of the instrument is a cylindrical hand-held structure, the diameter of the measuring surface is 9mm, and the sensitive element is a Hall element with a specification of 4× 2× 0.2mm3 When the probe is packaged, the distance between the sensitive element and the measuring surface is 1.05mm, so the sensitive element can naturally keep the distance of 1mm from the workpiece during measurement.

Technical indicators

1. The measuring range is lmt2mt 10 mt.

2. Sensitivity 0.02 mt

3. the accuracy is lmt2mt3.0.

4. Calibration magnetic field l mt DC magnetic field

5. The range of out-of-tolerance signal is 0.5 ~1mt.

6. Power supply AC 220V 50Hz

(without battery)

7. Overall dimensions: 250×2 12× 140 (mm)

8. Display: table pointer

8. Weight 3.5 kg