The Allis-Chalmers 5×14 vibrating screen remains a workhorse in sand/gravel and crushed stone operations, particularly in mid-sized aggregate plants processing 100-300 TPH. Its robust design features twin shaft mechanical exciters with grease-lubricated spherical roller bearings, handling materials up to 4″ (100mm) with screening efficiency of 85-92%.
| Component | Specification |
|---|---|
| Deck Size | 5′ x 14′ (1.5m x 4.3m) |
| Screen Cloth | High-carbon steel or polyurethane |
| Bearing Type | 22320CC/W33 Spherical Roller |
| Motor Power | 15-25 HP (11-18.5 kW) |
| Vibration Frequency | 700-900 RPM |
| Stroke Length | 0.375″-0.5″ (9.5-12.7mm) |
In a standard crushing-screening circuit:
1. Primary jaw crusher discharge → 5×14 screen
2. Oversize returns to cone crusher
3. Mid-size feeds secondary screens
4. Fines (-3/8″) direct to sand classifiers
Q: Premature bearing failure?
A: Check for proper grease quantity (fill 50% housing) and contamination from dust ingress.
Q: Uneven material distribution?
A: Install adjustable feed baffles at 45° angle, maintain ≤30° feed chute slope.
Q: Excessive frame vibration?
A: Verify spring condition (replace if compressed >10%) and proper torque on all fasteners.
A southwest US operation achieved 22% production increase after:
– Replacing worn deck panels with modular polyurethane
