521 Westland Road, Hickory, PA 15340 • Tel: (724) 356-2201 • Fax: (724) 356-4012 • Toll Free: 1-800-227-2970


In May 2004, the Bar & Cap System and A & O Engineering merged to become RQI Inc.

We specialize in Replacement Impactor Rotors and the Patented Bar & Cap System

We design and manufacture impactor rotors of the highest quality and advanced designs. Our rotors beat the OEM spare parts pricing, yet meet or exceed OEM specifications.
Our unique Bar & Cap System is available for most models of primary impactors and will increase crusher availability, there by increasing production and profits.




Solid Body Primary Rotors , retrofit or custom designed,  are available for CedarRapids, Universal, Missouri-Rogers, Jeffrey, Hewitt-Robins, Allis-Chalmers and other impactor models.

Semi-Solid Body Recycle Rotor assemblies are available for concrete and asphalt recycling and light duty primary applications with top feed size of 30 inches.

Secondary Open Disc Rotor retrofit assemblies are available for Boehringer, Humboldt-Wedag, Hazemag, Stedman, Universal Impact Master II and other HSI models.


Our unique Bar & Cap System is non-reversible for hard rock, primary application and fits single & double rotor impactors.

RQI Carrier Bars are Cast Alloy Steel, Triple Heat Treated, X-Rayed and machined as necessary.  Our Carrier Bars fit into Rotors exactly like the original O.E.M. Bars, utilizing O.E.M. Wedges and Bolts.

Caps mount onto the Dovetail or Bullnose Sliderail on the Carrier Bars, and are bolted to prevent lateral movement.  Caps are Cast Manganese Steel or Cast Alloy Steel, through hardened, for certain secondary applications.

Change out of Caps on a 2-Row Rotor can be accomplished in as little as 3 hours!