Oil Cleaning Centrifuges

Worldwide Leader in Bypass Filtration

Allied Reliability’s Spinner II® oil cleaning centrifuges are highly efficient, self-contained, oil-cleaning units for bypass and off-line filtration of engine lubricants, transmission oil, gear oil, and hydraulic oil. They are proven effective on all types of industrial machinery in manufacturing, oil & gas, marine, power generation, rail, landfill gas, machining, waste handling, and many other applications.

Using the power of centrifugal force, Spinner II centrifuges remove both large contaminants and ultra-fine particles as small as one-tenth of a micron. In a broad range of applications, Spinner II centrifuges are proven to reduce critical component wear up to 50%.

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Spinner II centrifuges reduce wear of critical components by up to 50%


Our centrifuges have been installed as OEM first-fit for more than 50 engine manufacturers including Caterpillar, Cummins, General Electric, and many more


Spinner II® centrifuges have provided an exceptional oil-cleaning performance on more than two million diesel engines worldwide

How It Works

Allied Reliability’s Spinner II centrifuge is a highly efficient bypass filtration device. It diverts a small sidestream of oil for processing and returns clean oil to the crankcase.

All centrifuge models have the same basic method of operation. This demonstration shows a Model 200HD centrifuge, which has a reusable rotor. A 500 Series centrifuge operates by the same principle but has a sealed, single-use, disposable rotor.

Powered only by engine oil pressure (pump-assisted models are available if needed), the centrifuge rotates at speeds over 6,000 rpm, generating a force more than 2,000 times greater than gravity. This force slings contaminants smaller than one micron out of your oil and packs them into a dense cake on the wall of the centrifuge bowl.

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Superior Wear Reduction

This chart illustrates the reduction in wear achieved with a Spinner II oil cleaning centrifuge vs. bypass filters (AC fine test dust fed at 1 gram/hour; 400-hour test using component weight loss method). Contact us for a copy of the complete report.


Proper oil filtration provides many benefits, including better machine and process reliability, longer operating intervals, lower costs, extended machinery service life, and reduced maintenance costs.

Off-Road, Construction, Mining
  • Boost productivity while protecting mobile and fixed plant machinery.
Fleet Trucking
  • Extend drain intervals and better protect engines.
Oil and Gas
  • More uptime for gensets, pressure pumping equipment, and more.
Transit Service
  • Trusted by virtually every North American fleet - we help your vehicles go further.
General Industrial
  • From marine applications to construction applications, get protection and savings.
Fabrication and Metalworking
  • Reduce operating costs, extend tool life and increase productivity.

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