Part Spotlight: Rotary Drum Knockers

This article was co-authored by:

Carrie Carlson
Technical Writer

Craig Peppin
Service & Lab Manager

Knockers are an essential tool in managing buildup in rotary dryers, coolers, and granulation drums, helping to maintain product integrity and process efficiency.

What knockers are available?
FEECO offers two different types of knockers – pneumatic hammer knockers and ball and tube knockers. Parts and retrofits are available for both.

How often do knockers require replacement?
Since knockers are a self-contained system not exposed to the material processing environment, they rarely require replacement.

What is the lead time for knockers?
Knockers have a typical lead time between 6 to 8 weeks for replacements, or 12 weeks for new systems/retrofits.

Is there anything else I need to keep in mind when ordering knockers?
Consider whether your existing knocking system is effective, or if an upgrade could provide improved performance.

How can I order knockers? 

Contact a FEECO Customer Service Engineer for a quote by filling out our contact form. The following info is necessary for a quote:

    • Shell material of construction
    • Shell thickness
    • Length of drum
    • Photos
    • Where the sticking occurs

About the Authors . . .


Carrie Carlson is a technical writer and visual designer.

More About Carrie

Craig Peppin is FEECO’s Customer Service Manager and Lab Manager.

More About Craig