Mav shrink discs or external locking devices, That offer a rigid, Zero, Backlash frictional connection between hollow shafts hub and shafts. These elements offer extremely concentric and expertly ideal for, Balanced connections high speed applications. Presented in 3 depending upon, Options heavy medium and, Torque transmissions light. Also available in split version, For oxidising/corrosive stainless steel, Operating conditions alongside surface coated units are offered alongside zinc / nickel plating and phosphate treatment.