Sound is caused by vibration, which is the acoustic characteristic of vibration. The characterization of noise includes sound intensity level, sound pressure level, and sound power level. The expression of sound intensity level is:
L1=10log(I/I).
L1 is the sound intensity level (dB)
I sound intensity (W/m2)
I0 reference sound intensity, 10-12W/m2, is the threshold sound intensity of 1000HZ.
And the expression of vibration acceleration level is:
L=20log(a/a).
L, vibration acceleration level (dB)
a, RMS value of vibration acceleration within a certain frequency range, (m/S2)
a0 =9.81×10-13m/S2
Instruments for testing the vibration acceleration of bearings are very common, but the equipment for testing bearing noise is very complicated, and most companies currently do not have such equipment.
Precision high temperature oil-free deep groove ball bearing 6001HZ available from stock
No.: 6001HZ
Size：12x28x8 mm
Weight：0.02kg
Lead time:3-5 business day
Type: Deep groove ball bearing
High speed with cage (Minimum 4000 RPM)
Minimum 400℃ high temperature resistance
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Miniature bearings are suitable for products requiring high speed, low friction torque, low vibration, and low noise environments, and are widely used bearings. Miniature bearings are suitable for various types of industrial equipment, small rotary motors, etc.; recently, there has been an increase in demand for miniaturization, weight reduction, and thinning of these devices.
Among the miniature bearings with ultra-small aperture, there are 18 kinds of miniature bearings with an inner diameter of φ2mm or less in the metric system 68, 69, and 60 series, and 6 types in the imperial system R series. On this basis, they can also be divided into ZZ steel plate bearing dust cover series , RS rubber bearing seal ring series, Teflon bearing seal ring series, flange plate series, stainless steel series, ceramic ball series, etc.
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