Logan Drive Cups are manufactured to perform in harsh conditions. Contact surfaces are heat treated to ensure long life. Standard cups are furnished with 1inch and 2 inch diameter pilot bores. All models can be furnished with standard lug or gear toothed configurations. Bolt Circle patterns, bores and axial lengths can be modified to meet specific design requirements. Drive Cups can be designed and manufactured to be integral with shafts, gears, couplings and stationary members (when used as a brake cup).