18" and Model 460 EXCEN-CRUSHER

EXCEN-CRUSHER® Clinker Grinders are specifically designed for both wet and dry bottom ash applications, offering superior performance and high-level reliability. With decades of proven experience, UCC clinker grinders effectively reduce material size providing higher efficiency in pneumatic, hydraulic and mechanical bottom ash handling systems.

The Model 460 is an equivalent design to the 18”, with the exception that the Model 460 has been specifically engineered for the International market with the drive and routine maintenance components designed to meet International standards.

With thousands of units in service, UCC EXCEN-CRUSHER Clinker Grinders are the industry standard for utility and industrial power plants across the world. Through continuous design improvement, the UCC EXCEN-CRUSHER offers efficient operation, superior sealing and longer service life. Most models are in-stock for immediate delivery to help minimize downtime.

  • Superior Construction for Longer, Reliable Service
    • Rugged and reusable fabricated steel body and cam support are built to last multiple service interval
    • Carbon steel construction with optional stainless steel for corrosive application
    • Standard 4-bolt DURITE® H cams are designed for severe-duty applicationSquare profile teeth provide effective shearing and longer wear life.
    • Optional flame sprayed ductile iron cams for high temperature applications
  • Optimal Sealing Performance
    • Standard spring-loaded packing glands prevent leakage, minimize maintenance and increase reliability
    • Elastomer seal rings resist abrasion and wallowing in low-temperature, wet applications
    • Superior performance of woven graphite packing in high-temperature, dry applications
  • Superior Seal Design
    • Fixed Bearing Style – UCC proven design includes elastomer seal rings in wet/low-temperature applications and woven graphite packing in dry/high-temperature applications fixed Bearing Style – UCC proven design includes elastomer seal rings in wet/low-temperature applications and woven graphite packing in dry/high-temperature applications
  • Efficient Operation
    • Single roll cam design produces more crushing force than a double roll design while reducing
      initial cost, rebuild cost and power consumption
    • 3 HP gearmotor is field proven to efficiently reduce the broadest range of friable materials
    • Solid state control panels provide automatic reversing and overload current protection
    • Standard drive design with flex coupling and control panel maximizes crushing torque
  • Simple Installation and Maintenance
    • Optional roll-out feature cuts down on installation and maintenance time and effort
    • Compact design and industry standard inlet/outlet/overall dimensions allow easy retrofit

    • Optional auto-lube controller eliminates day-to-day maintenance and ensures sealing performance

    • UCC factory rebuilds and kits extend clinker grinder life and increase return on investment

  1. What is an EXCEN-CRUSHER Clinker Grinder & what does it do?[+]
    "Clinker Grinders” are commonly used in the Coal Fired Power & other industries to reduce the size of friable materials (bottom ash, economizer ash, etc) so downstream handling systems can process the particles properly without plugging the line. EXCEN-CRUSHER is designed specifically for severe duty, abrasive ash crushing applications. Through continuous innovations and design improvements, the UCC EXCEN-CRUSHER remains the preferred clinker grinder for bottom ash size reduction.
  2. What information is needed to select the proper size crusher?[+]

    Basic requirements should be determined before selecting an EXCEN-CRUSHER clinker grinder, including:

    - Type of process material that will be handled and at what temperature

    - Application for a wet or dry service

    - Capacity (throughput) required for normal and upset conditions

    - Input or Discharge Particle Size Requirements

  3. What factors determine crusher size?[+]

    Size selection is primarily determined by the required capacity (throughput), although other considerations may play a factor. UCC EXCEN-CRUSHER clinker grinders are available in the following standard (inlet) sizes:

    - 12”x12”

    - 18”x18”

    - 27”x20”

    - 33”x30”

    - 54”x43”

    - 1370 mm

    - 840 mm

    - 460 mm

  4. What styles are available & how do I choose a crusher style?[+]

    Flange Bearing Style: This standard seal design uses spring loaded packing glands and seal rings to prevent leakage in both wet or dry applications. UCC’s proven designs include elastomer seal rings in wet/low temp applications (better abrasion resistance and better seal by resisting wallowing) and woven graphite packing in dry/high temp applications.

    Wet only - Floating Seal Style: For exceptional seal performance in wet/submerged applications, the optional floating seal design includes a flexible diaphragm which allows the packing gland to “ride along” with the shaft as it deflects so that the seal constantly remains concentric and leak-free. Basically, the floating seal compensates for the shaft deflection.

    Pillow-Block Style: This legacy design which features heavy-duty pillow-block bearings and fixed packing glands is still available to replace existing Pillow-Block style EXCEN-Crusher clinker grinders.

  5. How is the EXCEN-CRUSHER superior to other clinker grinders?[+]
    EXCEN-CRUSHER clinker grinders are specifically designed for superior performance in severe duty ash grinding applications. Our customers benefit from 40 years of clinker grinder design/operation experience and with readily available quality components, and field support. EXCEN-CRUSHER’s are the most durable, reliable, and cost-effective clinker grinders available
  6. How do I obtain additional information, product recommendations or pricing for EXCEN-CRUSHER clinker grinders?[+]
    Additional information can be obtained by contacting your local UCC Sales Representative.
Submerged Flight Conveyor

The Submerged Flight Conveyor (SFC) is a proven bottom ash system and the most cost-effective compared with other alternatives.



Mechanical chain and flight conveyor that continuously transports high temperature, dry or moist abrasive material.


Pneumatic Systems

UCC pioneered the first dry bottom ash system using pneumatic technology in 1920. The PAX Pneumatic Ash Extractor added new technology to this time-proven vacuum system design and offers many benefits over wet bottom ash systems.

Vibratory Systems

The VAX system is the latest evolution in dry bottom ash technology which delivers superior heat recovery, lower installed cost, higher reliability and less maintenance compared with conventional moving belt designs.