Overview of Shaft Clamping Elements Type RCK 50

The RCK 50 clamping elements consist of two conical rings designed to minimize radial space, allowing compact assemblies and use within small hub diameters. These units require the customer to provide their own thrust ring assembly. They provide low torque transmission per unit but can be combined up to four units to increase torque capacity. When fully clamped, they offer excellent gastight sealing. However, they do not self-center and require external centering of the hub.

Design and Usage Recommendations

• Recommended tolerances for full torque transmission:
  - Shafts up to 38 mm diameter: shaft tolerance h6, hub tolerance H7
  - Shafts 40 mm and above: shaft tolerance h8, hub tolerance H8
• Clamping surfaces should have a finish of Rz < 15 µm.
• Torque capacity increases with the number of elements combined:
  - 2 elements: 1.55 M Nm
  - 3 elements: 1.86 M Nm
  - 4 elements: 2.03 M Nm

Key Dimensions and Parameters

The document provides a detailed table listing various RCK 50 models with parameters including shaft diameter, hub diameter, torque capacity (Nm), axial force (kN), surface pressure (N/mm²), minimum hub diameter, and weight. For example, the RCK50-6x9 model supports 6 Nm torque with a minimum hub diameter of 37 mm and weighs approximately 10.9 grams. Larger models support higher torque and axial forces, with corresponding increases in hub diameter and weight.

Minimum outside hub diameters are based on medium carbon steels with a yield strength of 320 N/mm². For other materials or hub types, additional references are provided.

Additional Notes

• Assembly and disassembly instructions are referenced on page 24.
• Clamping rings for shafts up to 200 mm diameter are available on request.

Clamping Elements Types CCE 54 and CCE 55

These clamping elements utilize a single lock nut to apply clamping pressure, enabling quick assembly and removal. The lock nut can be secured by bending a tab of the lock washer. The thin walls of the clamping cones and low hub pressures make these suitable for soft materials such as aluminum and small hub diameters.

Type Selection and Usage

• Type CCE 54 is recommended where axial space is limited and torque requirements are low.
• Type CCE 55 is designed for higher torque transmission.
• Recommended tolerances for full torque transmission include shaft tolerance hs and clamping surfaces finished to Rz ≤ 15 µm.

Dimensions and Performance Data

The document includes detailed tables for both CCE 54 and CCE 55 types, listing parameters such as shaft and hub diameters, torque capacity (Nm), axial force (kN), surface pressure (N/mm²), locking nut type and thread, locking torque (Nm), minimum hub diameter, and assembly weights.

For example, the CCE54-14x25 model supports 32 Nm torque with a minimum hub diameter of 65 mm and uses an M20 locking nut with 95 Nm locking torque.

Minimum hub diameters are based on medium carbon steels with yield strength of 320 N/mm². For other materials or hub types, further references are provided.

Additional Notes

• Assembly and disassembly instructions are referenced on page 24.

Critical Specifications and Best Practices

• Ensure shaft and hub tolerances meet recommended values for full torque transmission.
• Maintain clamping surface finish to Rz <= 15 µm to ensure proper sealing and torque capacity.
• Use external centering methods for RCK 50 units as they do not self-center.
• Combine multiple RCK 50 units to increase torque capacity when needed.
• Secure lock nuts properly on CCE types to prevent loosening during operation.
• Refer to assembly and disassembly instructions carefully to avoid damage and ensure correct installation.

Summary of Tables

The tables provide comprehensive data on dimensions, torque capacities, axial forces, surface pressures, minimum hub diameters, and weights for various models of RCK 50, CCE 54, and CCE 55 clamping elements. These data are essential for selecting the appropriate clamping element based on shaft size, torque requirements, and material considerations.