Precision shaft–hub connections without compromise

(See ABSSAC at Machine Building North, 13 May 2026, on stand 18)

ETP clamping bushes operate on a hydraulic principle, using an internal pressure medium to generate uniform radial forces between the shaft and hub. When pressurised, the internal medium expands, creating a strong, evenly distributed clamping force around the entire shaft circumference. This uniform pressure eliminates stress concentrations commonly associated with mechanical locking methods and ensures precise concentricity between mating components.

One of the defining technical advantages of ETP clamping bushes is their ability to achieve extremely low runout and zero backlash. This makes them particularly well suited to applications involving high positional accuracy, such as servo-driven systems, indexing mechanisms and precision automation equipment. Because torque is transmitted purely through friction rather than mechanical engagement, wear is minimised and performance remains consistent over time.

Installation and removal are significantly simplified compared to conventional shaft-hub connections. ETP clamping bushes require no heating, cooling, or special tooling, allowing components to be mounted, adjusted, or replaced quickly and safely. This ease of handling reduces downtime during maintenance and enables precise axial and angular positioning during assembly, even in confined spaces.

ETP clamping bushes supplied by ABSSAC are engineered to handle a wide range of torque capacities while maintaining compact dimensions. Their design allows high torque transmission without increasing shaft diameter or hub size, supporting lighter, more efficient machine designs. The absence of keyways also preserves shaft integrity by avoiding stress risers, contributing to improved fatigue life and long-term reliability.

Material quality and manufacturing precision are central to the performance of ETP clamping bushes. Each unit is produced to exacting tolerances to ensure consistent pressure distribution, repeatable clamping force, and long service life under dynamic loading conditions. The sealed hydraulic system is designed for durability, making ETP bushes suitable for continuous industrial operation.

As a trusted supplier, ABSSAC supports customers not only with high-quality ETP clamping bushes but also with technical expertise to ensure correct selection and application. By matching torque requirements, shaft dimensions, and operating conditions, ABSSAC helps engineers achieve optimal performance and reliability from their shaft-hub connections.