Flanged Ball Screw Nuts for Dynamic Linear Motion Systems

Bosch Rexroth is releasing the FEH-E-B single nut with flange as part of its Performance Line of ball screw assemblies. This mechanical component optimizes travel behavior and load distribution for highly dynamic linear applications, specifically targeting the machine tool and servo press industries.

Redesigned Internal Geometry and Load Capacity
The FEH-E-B single nut integrates a split ball chain design with a reduced number of ball revolutions. This internal geometric modification yields a more uniform travel performance and alters how mechanical stress is distributed across the ball screw assembly. As a result of this optimized load distribution, the dynamic load capacities have increased by up to 14 percent, while the calculated service life of the component is extended by up to 50 percent compared to preceding models. This structural improvement directly supports continuous operation environments where large masses undergo highly dynamic movements.

Technical Specifications and Industrial Applications
Engineered to support heavy-duty linear motion technology requirements, the flanged single nut is available in eight sizes featuring a nominal diameter ranging from 32 to 63 millimeters and a lead of 5 to 20 millimeters. The connecting dimensions conform to the DIN 69 051, part 5 standard. These specifications allow the assemblies to be integrated into processing machines, automated manufacturing systems, and vertical linear actuators where high precision, energy efficiency, and mechanical repeatability are necessary. To accommodate diverse industrial requirements, the assemblies are manufactured in multiple preload classes and reach tolerance grades up to T3.

Sealing Architectures and System Integration
The updated FEH-E-B component operates within a broader system ecosystem that includes comprehensive sealing architectures and pre-lubrication configurations to mitigate operational wear. It joins other specialized components within the Performance Line, such as the FAR series for driven nuts and the FED series of double-speed nuts utilized with multi-start screws. For engineering integration, the mechanical parameters and physical data for these configurations can be modeled using proprietary digital selector and configurator platforms. These tools streamline the system design process for engineers calculating exact stroke lengths, lubrication requirements, and load limits.

Additional Context
This section details technical specifications and competitive benchmarking not included in the original news release.

High-dynamic ball screw assemblies in the machine tool sector are frequently benchmarked against comparable high-load series from manufacturers such as THK and NSK. For instance, NSK’s HTF (High Thrust Forward) series utilizes a specialized ball recirculation mechanism designed specifically to handle the extreme axial loads found in servo press applications. Similarly, THK’s high-speed ball screws implement proprietary ball cage technology to reduce friction and extend service intervals. The Bosch Rexroth FEH-E-B distinguishes itself through its split ball chain mechanism and reduced revolution count, an approach that specifically targets the mitigation of internal ball collision friction. While traditional end-cap or return-tube recirculation systems can induce vibration at high rotational speeds, the optimized internal recirculation in the FEH-E-B minimizes acoustic noise and thermal expansion, positioning it as a direct mechanical alternative for precision vertical axis drives requiring DIN 69 051 dimensional compliance.

Edited by Aishwarya Mambet, Induportals Editor, with AI assistance.

www.boschrexroth.com