Super-Precision Bearings

Super-Precision Bearings

With high running accuracy, high-speed performance, and high system rigidity, SKF super-precision bearings are ideal for machine tools and other precision applications, such as high-speed finishing stands for steel wire, racing cars engines and transmissions, and innovative fluid treatment applications. The bearings also minimise noise, vibration, and heat generation.

SKF’s assortment includes different bearings’ steel grades, including SKF’s trademarked NitroMax (for specific designs), giving you up to three times longer service life than standard steel bearings and hybrid bearings with ceramic rolling elements, particularly suited for high-speed applications.

Custom bearing options are also available. Our expert team are on hand to assist you in finding the right bearing for your application

Angular Contact Ball Bearings

SKF manufactures super-precision angular contact ball bearings for shaft diameters from 6 to 360 mm. Application requirements vary, and as a result, the SKF assortment of super-precision angular contact ball bearings includes four ISO dimension series, in numerous executions. The wide selection of designs and variants enables them to be incorporated into virtually every machine tool application as well as other applications where precision bearings are required.

Cylindrical Roller Bearings

SKF super-precision cylindrical roller bearings are characterised by:

• High speed capability
• High radial load carrying capacity
• High rigidity
• Low friction
• Low cross-sectional height

These bearings are therefore particularly well suited for machine tool spindles where the bearing arrangement must accommodate heavy radial loads and high speeds, while providing a high degree of stiffness.

Double Direction Angular Contact Thrust Ball Bearings

SKF double direction angular contact thrust ball bearings are designed to locate spindle shafts axially in both directions. These bearings are intended for mounting in combination with cylindrical roller bearings in the NN 30 K or N 10 K series in the same housing bore. This bearing combination simplifies machining of the housing bore.

Axial-Radial Cylindrical Roller Bearings

Super-precision axial-radial cylindrical roller bearings are commonly used to support rotary tables, indexing heads and multi-spindle heads on machining centres.

Key features:

• Shaft diameters from 80 to 850 mm
• Axial run-out close to P4 tolerance class
• Radial run-out better than P4 tolerance class

Angular Contact Thrust Ball Bearings for Screw Drives

Machine tools require screw drives that can position a work piece or machine component quickly, efficiently, and precisely. To meet these requirements, screw drives can be supported at both ends by SKF super-precision angular contact thrust ball bearings.

Key features:

• High degree of axial stiffness
• High axial load capacity
• High running accuracy
• Suitable for high speeds and rapid accelerations

Precision Lock Nuts

Industrial lock nuts with lock washers are not considered to be suitable for super-precision bearing applications because of the relatively wide manufacturing tolerances of the thread and abutment surfaces. As a result, SKF has developed a full line of precision lock nuts that are manufactured within very tight tolerances. These simple to mount devices, which locate bearings and other components accurately and efficiently on a shaft, meet the requirements of machine tool applications, both technically and economically.

Gauges

Conventional measuring methods and instruments are not always suitable for checking tapered seats or measuring the inside or outside envelope diameter of the roller set of a cylindrical roller bearing in precision applications. Therefore, SKF has developed an assortment of gauges specially designed to take the accurate measurements necessary when mounting cylindrical roller bearings with a tapered bore.