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GREYSUN ENGINEERING TOOL

Decanter Centrifuge Differential Speed Calculator

Calculate differential speed using main drive speed, back drive speed, gearbox ratio, and forward or reverse back drive rotation.

RPM
RPM
: 1
Differential Speed
—
RPM
Enter the operating values and select Calculate Differential Speed.

Back Drive Forward

When the back drive rotates forward, subtract back drive speed from main drive speed, then divide by the gearbox ratio.

Differential RPM = (Main Drive RPM − Back Drive RPM) ÷ Gearbox Ratio

Back Drive Reverse

When the back drive rotates in reverse, add main drive speed and back drive speed, then divide by the gearbox ratio.

Differential RPM = (Main Drive RPM + Back Drive RPM) ÷ Gearbox Ratio

Why It Matters

Differential speed affects solids conveying, retention time, cake dryness, back drive load, capacity, and overall separation performance.

Important: This calculator provides a mathematical result based on the entered values. Confirm the correct gearbox ratio, rotation configuration, and manufacturer specifications before making operating adjustments.

Need Help Optimizing Differential Speed?

Greysun can help troubleshoot wet cake, poor centrate clarity, back drive load problems, changing feed conditions, and centrifuge performance.

Talk to a Greysun Engineer

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Whether you need repairs, replacement parts, remanufacturing, or a new OEM centrifuge, Greysun’s engineers are here to help.

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