YJ18-1 1/4 Steel Spur Gear 106mm ID a spring loaded pressure plate

a spring loaded pressure plate (magnet armature) presses against the rotating discs

But why settle for a knock-off when you can have the original - from Boston Gear

ANGULAR DISPLACEMENT — Single 45° — Double 90°

California Provision: WARNING: Cancer and Reproductive Harm - www

YJ18-1 1/4 Steel Spur Gear 106mm ID a spring loaded pressure plateBoston Gear spur gears are designed to transmit motion and power between parallel shafts. The different styles offered include spur, gear rack, pinion wire, stem pinions, and internal gears, and most come with a selection of bore diameters, keyways, and setscrews to accommodate a wide variety of application requirements. They are available in plastic, non metallic, brass, steel, and cast iron and are manufactured in a variety of styles, including