TIMKEN angular contact ball bearings replacement
As we all know, the accuracy and quality of the spindle bearings are the key factors affecting the performance of the spindle. For how to define the accuracy level of a precision bearing, ISO/ABEC defines the width tolerance, roundness, verticality, taper, axial runout and radial runout of the inner and outer rings for the annular bearing engineering committee of the American Bearing Manufacturing Association. In order to achieve high precision, high speed, high stiffness, low vibration and low heat generation of the machine tool spindle, more parameters of the bearing itself need to be controlled.
TIMKEN's precision angular contact ball bearings add parameters not defined by ISO/ABEC to customers, including preload tolerances, functional testing, traceability and micron code, cleanliness, raceway curvature, ball grade and roundness, surface Processing (functional and non-functional surfaces), steel specifications, cage trim and design, and mounting chamfers. The definition of these parameters enhances the quality of Timken's precision angular contact ball bearings, which improves the performance of the machine spindle. The preload deviation of super precision angular contact ball bearings is at H. If the tolerance reaches H, the actual preload of a bearing with a nominal preload of KLM 5 can be between 178-980N. For the ball screw support bearing with inner diameter PM:, the preload deviation tolerance tight control of the preload tight tolerance of the ultra-precision angular contact ball bearing ensures the stability of the spindle stiffness and reduces the repair time of the machine tool customer. The bearing damage caused by the rolling bearing body slippage, heat generation and system unloading caused by the bearing manufacturer's large preload deviation is reduced, thereby prolonging the normal running time of the machine tool.
Functional test
Before leaving the factory, TIMKEN will perform 100% functional test on super-precision angular contact ball bearings, and test the super-precision angular contact ball bearings through digital vibration filter analysis to ensure bearing quality and application performance. All test results are traceable.
Cleanliness
TIMKEN precision bearing products are highly clean, because Timken will clean the precision angular contact ball bearing products in the cleaning workshop. F) GR ultra-precision bearing components are generally cleaned with multi-stage solvent 2 - to avoid impurities Bearings prevent inherent sources of contamination. It is worth mentioning that the cleanliness of the cleaning workshop has reached the level of cleanliness in the operating room of the hospital. In addition, Timken grinds the non-working surface of the bearing to ensure that the bearing is free of impurities before leaving the factory. Therefore, the production of bearing products can increase the normal running time of the machine. At the same time, in the production process, the technician also controls the curvature and uniformity of the raceway and the grade of the steel ball, which reduces the vibration and thus reduces the heat generation. Timken has extensive metallurgical knowledge and experience, and has its own special steel production plant, which enables
Guarantee the quality of precision bearing raw materials. The bearing steel produced by Timken is one of the purest bearing steels in the world, with no impurities, which increases the service life of the bearings.
Cage
The cage is critical to the machine tool bearings and its performance affects the stability of the machine bearings under high speed rotation. Timken's standard cages are made of phenolic resin. The internal design and pocket clearance tolerances tightly control the guide surface to ensure good stability of the cage during high speed operation, lubrication and dynamic loading. The precision angular contact ball bearings manufactured by Timken are all F)G*."! Brands. Precision angular contact ball bearings are mainly available in two structural designs: the high-rigidity S> series and the high-speed TU series for different applications. Requirements: Basic, open F) bearing design with higher spindle speed and greater dynamic radial stiffness, so the spindle can cut more material in less time while ensuring excellent finished tolerances. Thanks to the unique combination of the unique ball body and the precision engineered raceway contour, and further improving the machining efficiency, TIMKEN has a history of IM development in the development of ceramic ball bearings. The characteristics of the ceramic material itself give the ceramic ball bearing a high Stiffness, high speed, high temperature resistance and long life, to meet the needs of high-end customers for machine tool bearing products.
Ball Screw Support Bearings The new MMN, MMF double row ball screw support bearings have leading performance to meet the requirements of the machine for positioning smoothness and accuracy. The low torque integral seal is effective against impurities for more reliable operation and longer life. The ultra-precision double-row structure supports bidirectional axial loads and also supports composite radial load forces and overturning moments. The innovative cage design accommodates more balls for greater load capacity.
Axial running tolerances reduce runout and maximize precision in precision machine positioning and repeat positioning. This will allow the machine to achieve maximum productivity while ensuring a more accurate and smoother cut. The seal unit is divided into flanged MMF and non-flanged MMN series, which are designed to simplify standard nut mounting and swivel nut mounting. The MMF flange series does not require external positioning of the outer ring. The standard series is a pair of sealed constructions, both of which are available in both enclosed and sealed configurations in either a two- or four-column configuration.
