Clamping Elements Type RCK 13 Email: [email protected] These shaft clamping elements are very compact units capable of transmitting medium torques. Their design ensures good concentricity between hubs and shafts, without any other means of location. A slight axial movement between hub and shaft occurs during clamping. These units can be installed totally within the hub providing optimum safety, and minimal axial length. Recommended tolerances for full torque transmission are:Shaft Hub Clamping surfaces to be finished to Rz ≤ 15 µm. X = Distance required to remove screws, additional clearance for alan key may be required. Surface Pressure Shaft Hub Ps Ph 2 N/mm N/mm2 Clamping Screws Approx. Size Torque Weight *Minimum outside diameter of hubs manufactured in medium carbon steels with yield strength ≥ 320 N/mm . For hub types, and other materials, refer to page 3. For assembly and disassembly instructions refer to page 24.