Material: Steel. The MSD clamping bush consists of a double-walled, hardened steel sleeve filled with a special pressure medium, a seal, a piston, a compression flange and fastening screws. When tightening the screws, the sleeves expand evenly against shaft and hub, creating a rigid connection. When the screws are loosened, the bush returns to its initial position and can be easily demounted. Concentricity: about 0,03 - 0,06 mm Tolerance: Shaft h8 - k6 (for Product No. 615 215 00 only h7), Hub H7 Advantages: -fast mounting/demounting -sensitive adjustment of the hub can be carried out during assembly -low fastening torque and few screws allow very simple assembly. -good concentricity -small dimensions allow little ouside diametre of the hub MN = transmittable torque at load of 0. If the screws are fastened with Manz. Fa = transmittable axial force at torque of 0. If the screws are fastened with Manz. Manz = required fastening torque for the screws. The dimensions refer to bushes before assembly. Temperature range: -30° to +85°C.