Why Is My Industrial Fan Vibrating? 5 Common Causes and Solutionsv
💡Impeller Imbalance (Most Common Issue)
Dust buildup, corrosion, or deformation makes the impeller unbalanced.
Solution：
✔ Clean dust and debris on the impeller
✔ Check for cracks or deformation
✔ Perform dynamic balancing using a balancing machine
2. Bearing Failure or Poor Lubrication
Symptoms:
Unusual noise, bearing temperature above 80 °C, oil turning dark or dry.
Solution:
✔ Refill or replace grease (lithium-based or high-temperature)
✔ Replace damaged bearings immediately
✔ Recommend inspection every 2,000 hours and maintenance every 5,000 hours
3. Loose Base or Anchor Bolts
Symptoms:
Fan frame visibly shakes, bolts loose or cracked, uneven foundation.
Solution:
✔ Tighten all anchor/foundation bolts
✔ Re-grout or reinforce the base if necessary
✔ Add vibration isolators or rubber pads to reduce mechanical transmission
4. Poor Alignment Between Fan and Motor
Cause:
Improper installation or long-term operation causes shaft deviation or coupling misalignment.
Solution:
✔ Align motor and fan using laser alignment tools or feeler gauges
✔ Keep radial and angular misalignment ≤ 0.05 mm
✔ Inspect couplings and elastic elements regularly
5. Air Duct Blockage or System Resonance
Symptoms:
Vibration increases at a specific speed or after several minutes of operation.
Solution:
✔ Check for blocked ducts, closed dampers, or filter clogging
✔ Avoid operating at the resonance frequency
✔ Use flexible joints, dampers, or adjust support structure if needed
What Is a Safe Vibration Level?
| Measurement Point | Safe Level | Warning Level | Dangerous Level |
|---|---|---|---|
| Fan bearing seat | ≤ 4.5 mm/s | 4.5–7.1 mm/s | ≥ 7.1 mm/s |
| Motor bearing | ≤ 2.8 mm/s | 2.8–4.5 mm/s | ≥ 4.5 mm/s |
Related Blogs
-
Opps, No posts were found.
Customer Testimonials
Trusted by industrial partners across 30+ countries — real feedback from our global clients.
“We’ve been using Dajing’s 9-19 high-pressure centrifugal blowers for our dust removal system. The airflow performance is excellent, and the noise level is much lower than our previous models. Truly reliable quality.”
Ali Rahman
FAQ's
Didn’t find the answer you were looking for?
Contact our engineering team for a customized solution.
Our engineers will recommend the suitable blower type based on your air volume, pressure, temperature, and working conditions.
You can also send your technical parameters or drawings directly for evaluation.
All Dajing blowers are ISO9001 and ISO14001 certified.
Depending on customer needs, we can also provide CE, EAC, or other international compliance certificates.
Yes. We offer fully customized blower systems to meet special environmental or industrial requirements, including high-temperature, dust-removal, and corrosion-resistant designs.
Generally 7-15 working days after receiving the deposit, depending on the order quantity and customization level.
Yes. We provide online technical guidance, spare parts supply, and on-site service if required.
Our goal is to ensure your blower operates efficiently throughout its service life.