What Are Springs and Spools? Definition & Role in Vibratory Separators

Springs and spools are the vibration isolation and support components mounted between the vibratory separator body and its base frame, allowing the machine to vibrate freely while isolating the vibration from the floor, support structure, and surrounding equipment. They are critical maintenance items that directly affect screening performance.

Coil springs (typically steel) and spools (cylindrical rubber or urethane isolators) serve the same purpose: they support the weight of the separator while allowing it to oscillate in its designed motion pattern. Springs are more common on larger industrial separators, while rubber spools are typical on smaller units. Both types absorb the vibratory force, preventing it from transmitting to the building structure, and they must be matched to the separator's weight and vibration characteristics.

Why This Matters in Vibratory Screening

• Screening performance — Worn or broken springs/spools alter the vibration pattern, reducing screening efficiency and unbalancing material flow.
• Structural protection — Failed isolation allows vibration to transfer to floors and support structures, potentially causing fatigue damage.
• Noise reduction — Properly functioning springs/spools significantly reduce noise transmitted to the facility.
• Regular replacement — Springs fatigue over time (typically 1–3 years depending on use). Replace in complete sets to maintain balanced support.

Related Glossary Terms

• Motion Generator / Vibratory Motor — Generates the vibration that springs isolate
• Amplitude — Vibration throw that springs must accommodate
• Flex Connector — Another vibration isolation component

Springs and Spools FAQs

What are springs and spools on a vibratory separator?

Vibration isolation components between the separator body and base frame. They allow free vibration while preventing transmission to the facility. Replace in complete sets when worn.