Next-generation disc pack coupling dramatically reduces service time

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

In environments where uptime is critical, traditional couplings often hide significant costs, demanding hours of labour for what should be routine servicing. The SFU challenges this norm with an innovative drop-out design that dramatically reduces service time while preserving precision.

In many high-speed spindle assemblies and automated test rigs, even minor interventions such as replacing a motor or bearing can escalate into a major operation. Conventional couplings typically require complete removal from the shaft, forcing technicians to dismantle surrounding housings, rely on heavy pullers to release press-fit components, and then spend considerable time realigning the system to regain accuracy. The disruption is costly, both in labour and lost production.

The Servoflex SFU addresses this bottleneck through a separable, modular architecture. Its central disc pack can be detached independently, while the hubs remain fixed securely on the shafts. This seemingly simple change transforms maintenance procedures. Components can be replaced quickly by dropping out the centre section, original alignment is preserved because the hubs never move, and accessible modular bolts remove the need for heat or specialist pulling tools. What once took hours of careful disassembly and re-alignment can now be completed in minutes, with far less risk of shaft or component damage.

Performance has not been compromised in the pursuit of serviceability. The SFU is engineered for zero-backlash operation, making it ideally suited to high-dynamic applications such as CNC machining, robotics and precision automation. The single-flex configuration offers a compact, rigid solution capable of operating at speeds of up to 18,000 rpm, while the double-flex version incorporates a spacer to accommodate more complex parallel and axial misalignment at speeds of up to 14,000 rpm. With outer diameters ranging from 70 to 140 mm and bore sizes from 8 to 60 mm, the SFU series provides flexibility across a wide range of demanding applications.

With the launch of the Servoflex SFU, ABSSAC is not simply introducing a new coupling, but redefining how high-speed systems can be maintained. By eliminating unnecessary downtime and preserving precision, the SFU allows manufacturers to focus less on servicing challenges and more on performance, productivity, and reliability.