Vibrator Motor
Specialized power for material handling and processing.
Vibrator Motor
WhatsApp for 15-min engineer call
Warranty
1 Year Standard
Service
Covered by Warranty
Certified
ISO 9001:2015
Experience
24 Years
Product Overview
The Sun Star vibrator motor is a three-phase induction motor with eccentric weights (unbalance masses) bolted to both ends of the rotor shaft. When the motor spins, these weights generate centrifugal force proportional to the weight mass and the square of rotational speed. By adjusting the relative angular position of the eccentric weights, the operator can tune the centrifugal force from 0% to 100% of the rated maximum — providing precise control over vibration amplitude for different materials and screen sizes.
Key Features
Technical Specifications
| Power Range | 0.5 HP to 20 HP |
| Speed | 2880 / 1440 / 960 / 750 RPM |
| Force Output | Up to 5000 kg |
| Insulation | Class F |
| Protection | IP55 / IP65 |
| Mounting | Universal Foot Mount |
Common Applications
Industries Served
Mining & Quarrying
Powers vibrating screens, grizzly feeders, and dewatering screens for aggregate, mineral, and ore processing operations.
Cement & Building Materials
Drives bin activators, cement silo discharge systems, and vibrating feeders for raw material handling in cement plants.
Foundry & Casting
Shakeout tables, sand reclaimers, and mould vibrating systems for ferrous and non-ferrous foundry operations.
Construction
Concrete vibrators for slab, column, and beam compaction, and precast concrete manufacturing vibration tables.
Food & Pharmaceutical
Sieving and grading equipment for powders, granules, and pellets in food processing and pharmaceutical manufacturing.
Key Benefits
- Adjustable centrifugal force from 0–100% rated output allows one motor to handle different material types and screen configurations
- IP65 dust-tight construction survives the abrasive dust and particle environments of mines, quarries, and foundries
- Heavy-duty vibration-rated bearings provide 8,000–10,000 hours of continuous vibration service life
Why Choose Our Motors
- Purpose-designed for vibration — not a modified standard motor with bolt-on weights
- Bearings are specifically rated for continuous vibratory loads with reinforced cages and special grease
- Housing is castings-grade iron with additional ribbing — not standard motor shells that crack under vibration stress
Manufacturing & Quality
Manufacturing Process
Vibrator motor manufacturing adds several critical steps beyond standard motor production. Eccentric weights are CNC-machined from high-density steel to precise mass tolerances (±2% of rated unbalance). The rotor assembly including eccentric weights is dynamically balanced as a complete unit — this is essential because any residual imbalance is amplified at operating speed.
Quality Standards
- Eccentric weight mass tolerance verified to ±2% of rated unbalance
- Complete rotor assembly dynamically balanced with eccentric weights installed
- 30-minute full-speed run-in test with bearing temperature monitoring
- IP65 ingress protection verified by pressurised air test where applicable
- Centrifugal force output verified against rated specification
Certifications
Selection Guide
Vibrator motor selection depends on three key parameters: centrifugal force required, vibration frequency (RPM), and amplitude. For vibrating screens processing aggregates, calculate the required centrifugal force as approximately 3–5× the weight of the screen deck plus material load. A 2-pole (2880 RPM) motor produces high frequency with small amplitude — ideal for fine screening and compaction.
Comparison With Similar Motors
| Feature | Sun Star Motors™ | Typical Market Motor |
|---|---|---|
| Construction | Purpose-built vibrator motor housing with reinforced ribbing | Modified standard motor shell |
| Bearings | Vibration-rated with reinforced cages | Standard motor bearings |
| Force Adjustment | Field-adjustable 0–100% with marked positions | Fixed or limited adjustment |
| Balancing | Complete rotor balanced with eccentric weights installed | Motor balanced without weights |
| IP Rating | IP55 standard, IP65 available | IP55 only |
| Run-in Test | 30-minute full-speed run-in with temperature monitoring | Quick no-load test only |
Installation Guidelines
- Mount the vibrator motor rigidly to the vibrating structure (screen deck, feeder trough, or bin) using high-tensile bolts — standard bolts will loosen and fail under vibration
- Use lock washers or Nyloc nuts on all mounting bolts — check bolt torque after the first 24 hours of operation and weekly thereafter
- For paired motor installations on vibrating screens, both motors must be identical in rating, pole count, and eccentric weight setting — mismatched motors cause irregular vibration patterns
- Adjust eccentric weight positions to achieve the required centrifugal force before energising — refer to the force adjustment chart on the motor nameplate
Maintenance Tips
- Grease bearings every 2,000 hours (more frequently than standard motors) using vibration-rated grease specified on the nameplate
- Check all mounting bolts weekly for the first month, then monthly — vibration gradually loosens bolted connections
- Inspect eccentric weight locking bolts at every greasing interval — a loose weight causes destructive imbalance
Troubleshooting Guide
| Issue | Possible Cause | Solution |
|---|---|---|
| Insufficient vibration force | Eccentric weights set to low force position, wrong motor speed selected, or one motor in a pair has failed | Verify eccentric weight angular position against the force chart. Check that both motors in paired installations are running. Verify motor speed matches screen design speed. |
| Excessive or uncontrolled vibration | Eccentric weight locking bolts loose, bearing failure causing additional imbalance, or structural resonance | Stop immediately. Check all eccentric weight bolts for tightness. Inspect bearings. If structure is resonating, change motor speed or adjust isolation spring stiffness. |
| Premature bearing failure (under 2,000 hours) | Incorrect bearing type installed during replacement, insufficient greasing, or motor mounted with excessive overhang | Replace only with vibration-rated bearings as specified on the nameplate. Increase greasing frequency. Verify mounting does not add cantilever loads to the motor shaft. |
Warranty Information
All Sun Star Motors™ vibrator motors carry a 12-month warranty from the date of dispatch, covering manufacturing defects including the motor, eccentric weight assembly, and special bearings. Warranty applies under normal operating conditions within the specified duty cycle and force output range.
Quality Assurance • Sun Star Motors™