Hydroviscous Damping and Changeable Bearing Preload

Product catalog summary

Introduction
The document discusses the advanced spindle technology developed by GMN Paul Miller Industrie GmbH & Co. KG, focusing on hydroviscous damping and changeable bearing preload to enhance machining productivity.

Hydroviscous Damping
This technology significantly reduces natural vibrations by up to 65%, allowing for higher cutting depths and improved surface quality across various machining processes. The dynamic stiffness in the axial direction is improved by up to 135%, resulting in better surface finishes.

Performance Improvements
Tests conducted by the Laboratory of Machine Tools and Production Engineering at the Rhine-Westphalia Institute of Technology Aachen demonstrated that the GMN high-speed spindle could double the stable cutting depth at speeds between 10,000 and 18,000 rpm compared to standard spindles.

Surface Quality
Under production conditions, GMN spindles achieved a roughness of 0.89 µm, significantly better than the 2.36 µm achieved by standard models, indicating a 62% improvement in average roughness Rz.

Energy-Efficient Hydraulic Power Unit
The spindles are equipped with a specially developed hydraulic power unit that supplies oil efficiently, allowing for adjustable bearing preload to optimize spindle performance based on machining tasks.

Compatibility and Retrofitting
The new spindle models are structurally identical to standard models, making them easy to retrofit into existing machines. They are available for both grinding machines and machining centers.

Specifications
Various spindle types are available, including those for manual and automatic tool changes, with speeds up to 75,000 rpm and customizable interfaces. Options include automatic balancing systems and AE sensors.

Conclusion
The document highlights the significant advancements in spindle technology by GMN, offering improved machining capabilities and surface quality through innovative hydroviscous damping and adaptable bearing preload systems.

Catalog excerpts

Hydroviscous Damping and Changeable Bearing Preload-1

GMN Paul Miller Industrie GmbH & Co. KG AuBere Bayreuther Str. 230 - D-g041 Niirnberg Hydroviscous Damping and Changeable Bearing Preload Mail: [email protected] www.gmn.de Spindle technology: Phone: +49 911-5691-576 - Fax: +49 911-5691-699 Mail: [email protected]

Open the catalog to page 1

Hydroviscous Damping and Changeable Bearing Preload-2

Hydroviscous damping and changeable bearing preload Beating force} Due to the hydroviscous system, damping of natural vibrations is enhanced considerably. In the axial direction, an improvement in dynamic stiffness of up to 135 % is achieved. This results in significantly reduced natural vibrations in the machining process, enabling a very good surface quality. Under production conditions at GMN’s own manufacturing New spindles are structurally identical to standard models and easy to retrofit in already existing machines facility, GMN grinding spindles have been tested at internal cylindrical...

Open the catalog to page 2

All GMN USA catalogs and technical brochures

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

Brand list