SILO UNLOADERS - VAN DALE       Van Dale Magnum Pow'r Ring Silo Unloader Models available for 14'-24' diameter silos Free floating drive system with direct coupling positive ring and gear tooth engagement design Center position guide wheel provides balanced, positive ring drive performance and stability Large 7’4” diameter channel drive ring made of 7-1/8” x 3/16” thick steel with 2” drive lip for outstanding ring drive leverage Self-adjusting, spring-loaded cantilevered walking wheel holds wall cleaners snugly against the silo wall for smooth operation Positive position torque arm assembly is built to last with no twisting or flexing High performance 27” impeller provides high performance unloading at 993 RPM with tip speed of 7,019 feet per minute "Saber Edge" augers with 16 degree forward pitch keep forage moving toward the center of the auger tube, for increased capacity and less wear Van Dale Magnum Surface Drive Unloader Models available for 12' - 30' diameter silos Proven suspension - either single main cable for higher lifting and more material storage or tri-suspension for strong, steady support 1/4” thick “Saber Edge” augers with 16 degree forward pitch offer superior performance and unmatched durability Reliable torque arm assembly Easy-to-adjust balance weights Durable 10” wall wheels feature durable polypropylene construction