Duff Norton, USA, manufactures locking ring assemblies. They offer a superior solution for mounting, repositioning and removing components more securely and conveniently on a shaft than with keyways, setscrews and locknuts. Locking ring assemblies allow repositioning a component on a shaft to adjust alignment, synchronizing positions of different components, or for timing functioning. The assembly avoids backlash that is sometimes encountered with keyed connections. In addition, overall cost is often less because keyways, threads, and close tolerances are not required. These locking ring assemblies allow generous tolerances on shafts and hubs. Features and benefits include: superior performance against reversing, dynamic and impact loading; ease of installation, assembly and disassembly; capable of transmitting high torques and axial loads; precise positioning and adjustment; wide variety of sizes and styles available; and most sizes are in stock for immediate shipment. Uses are for: Flywheels, Levers, Cams, Shaft-mounted gear units, Crane wheels, Mixer shafts, Conveyor pulleys, Sheaves, Pump impellers, Fan wheels, Rolls, Flanges, Bucket wheels, Windmill propellers, Pinions, Drum connection for belt conveyors, Hand wheels, Winches, Bevel gears, Worm gears, Helical gears, Sprockets, Couplings, Clutches, Brake drums, Rock cutting heads, Ship propellers, Turbine rotors, and Truck wheels. Locking element series are available for low torques, for medium to high torques. Higher transmittable shaft torques can be obtained by mounting 2, 3 or 4 locking elements in series.