Technical Vibration Analysis & Testing
ZGBK utilizes high-precision transducers measuring velocity in µm/s across three critical frequency bands: Low (unbalance), Medium (raceway waviness), High (surface roughness).
TECHNICAL SPECIFICATION
Bearing Vibration Standards & Technical Specifications
Bearing Vibration Standards are the primary indicators of a bearing's manufacturing quality and rotational smoothness. By adhering to international standards, ZGBK ensures silent operation for precision applications. For a complete understanding of how materials impact these levels, refer to our Materials & Accuracy Standards.
Vibration Velocity Limit Chart (V1, V2, V3)
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| BORE DIAMETER (MM) | V1 GRADE (STANDARD) | V2 GRADE (LOW NOISE) | V3 GRADE (SUPER SILENT) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| LOW | MED | HIGH | LOW | MED | HIGH | LOW | MED | HIGH | |
| 5 – 6 | 90 | 60 | 50 | 58 | 36 | 33 | 35 | 21 | 18 |
| 7 – 9 | 110 | 80 | 65 | 72 | 48 | 40 | 44 | 28 | 24 |
| 10 – 12 | 140 | 100 | 85 | 90 | 60 | 50 | 55 | 35 | 30 |
| 15 – 17 | 180 | 130 | 100 | 115 | 75 | 60 | 70 | 45 | 36 |
| 20 – 25 | 230 | 160 | 130 | 150 | 100 | 80 | 90 | 60 | 48 |
| 28 – 32 | 290 | 210 | 170 | 190 | 130 | 100 | 115 | 75 | 60 |
| 35 – 40 | 380 | 260 | 210 | 240 | 160 | 130 | 150 | 100 | 80 |
| 45 – 50 | 480 | 330 | 260 | 300 | 200 | 160 | 190 | 130 | 100 |
| 55 – 60 | 600 | 420 | 340 | 380 | 260 | 210 | 240 | 160 | 130 |
| 65 – 70 | 750 | 520 | 420 | 480 | 330 | 260 | 300 | 200 | 160 |
| 75 – 100 | 1450 | 1000 | 800 | 950 | 650 | 520 | 600 | 420 | 340 |
* Vibration velocity limits in µm/s. Frequency bands: Low (unbalance), Med (waviness), High (roughness/dust).
Understanding Noise Grades (V vs Z)
V-Grade (V1, V2, V3): Measures vibration velocity — best indicator of structural integrity.
Z-Grade (Z1, Z2, Z3): Measures vibration acceleration in dB — correlates to audible noise.
Environmental Factors Affecting Vibration
ZGBK recommends using high-purity synthetic greases for noise-sensitive applications. Ensuring correct bearing seat tolerances prevents ring deformation — a leading cause of vibration.
Predictive Maintenance & Installation
Proper installation using induction heaters and precision alignment tools is vital. A bearing "forced" onto a shaft will immediately lose its V3 rating due to internal stresses.
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