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ROCKWELL'S NEW FRONT NON-DRIVE STEER AXLES HELP EXTEND TIRE WEAR

 ROCKWELL'S NEW FRONT NON-DRIVE STEER AXLES HELP EXTEND TIRE WEAR
 TROY, Mich., Oct. 9 /PRNewswire/ -- A new camber angle setting for the entire line of Rockwell (NYSE: ROK) front non-drive steering axles may lead to a decrease in tire wear -- thereby extending tire life, say officials at Rockwell International Corporation's Automotive business.
 Effective Sept. 1, 1992, the new camber setting was implemented on all front non-drive axle models including: the FC, FD, FF, FG, FL, 17100, 17101 and 17111 Series.
 The camber angle change is the primary result of a recently concluded, multi-year field test and study launched by Rockwell, May Trucking and Michelin Tire to determine the effect of camber and toe settings on tire wear.
 The unloaded camber setting change is from positive 3/4 degree left/positive 1/4 degree right, to an unloaded positive 1/4 degree left and right.
 According to Thomas L. McNorton, national technical manager of Field Operations for Rockwell Automotive's On-Highway Products, the new camber angle setting will provide optimum performance under loaded conditions, where a slightly negative camber setting will result.
 The change in camber setting will be accomplished by revising the machined kingpin inclination angle from the current 5 degrees 45 minutes left hand/6 degrees 15 minutes right hand -- to 6 degrees 15 minutes both left and right hand.
 "The new camber settings are planned to equalize tire wear more uniformly on front non-drive axles and virtually eliminate high left-to- right bias," McNorton said.
 Front axles with the new camber are identified by the date of manufacture. Kingpins, steering knuckles, spindles and all other front axle components will be completely interchangeable.
 McNorton noted that front non-drive steer axles currently being manufactured by Rockwell offer dependable performance.
 "The camber setting on front non-drive axles that are currently being manufactured is perfectly fine and operable," he said. "However, by conducting this study, we have been able to fine-tune the camber setting to optimize the wear of today's radial tires," McNorton added.
 Toe Settings Will Remain Constant
 McNorton said toe settings will not change, adding the new camber setting should ensure that the front axle is less sensitive to minimal toe changes.
 McNorton also noted that study results demonstrate that slightly negative camber and slightly positive toe not only provide the best tire wear, but also "appear to be more forgiving by allowing for greater toe- angle setting variations," he said.
 Rockwell's On-Highway Products supplies vehicle manufacturers around the world with an evolving lineup of drivetrain components engineered with advanced technology. Rockwell components include axles -- steer, drive and trailer; brakes -- cam, wedge, air disc and automatic slack adjusters; clutches; driveshafts and universal joints; on-board electronic management systems; transmissions; vehicle control systems; and aftermarket parts. The company also supplies heavy-duty truck plastic hood assemblies.
 Rockwell International is a multi-industry company applying advanced technology to a wide range of products in its electronics, aerospace, automotive and graphics businesses.
 -0- 10/9/92
 /CONTACT: Mike Pennington of Rockwell, 313-435-1933/
 (ROK) CO: Rockwell International ST: Michigan IN: AUT SU: PDT


DH -- DE009 -- 8245 10/09/92 09:55 EDT
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Publication:PR Newswire
Date:Oct 9, 1992
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