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Nolan wheel/axle and bearing assemblies are adaptable for use on push cars, trailers and similar maintenance-of-way applications. The 74 Series assemblies come complete with one-piece tapered steel axle, two pillow block roller bearings and two tapered bore 16-inch or 20-inch cast ductile iron wheels. 74 Series axle assemblies are available in both insulated and non-insulated models. All models fit standard 56-1/2 inch track gauge. Models for special track gauges are available. The AATS Series stub axle assemblies are available in kits for 1-inch diameter axle sizes. Assemblies are available in insulated only. Wheels may be purchased separately.