Super Precision Angular Contact Ball Bearings
Overview
NSK offers a wide lineup of super precision angular contact ball bearings to provide optimal specifications for your application.
Our bearings provide the perfect solution for equipment requiring high running accuracy or high rotational speed, such as the main spindles of machine tools.
Lineup Highlights
- Standard bearings that conform to ISO standards and specialized series for machine tools
- Sealed bearings with prepacked grease
- A range of NSKROBUST™ high-performance bearings for both high rigidity and ultra-high speeds
Product List
NSKROBUST bearings were developed using NSK’s flagship material, evaluation, and analysis technologies and offer especially high performance in machine tools. Sealed options allow for even longer life, improving machine tool reliability.
These features reduce impacts on the environment and help to save energy.
Features
- High speeds
The NSKROBUST Series reduces heat generation and achieves high-speed rotation. - Long life
X-type bearings feature heat- and wear-resistant SHX steel for long life in high-speed applications. - Wide lineup
A variety of contact angles and ball materials meet needs across applications. - Sealed options for even longer life
A wide range of sealed types offer 1.7x longer grease life than that of open bearings.
Spinshot II bearings further optimize lubrication to achieve remarkably quiet operation with ultra-high-speed rotation.
Features
- Oil-air lubrication realizes extremely high speeds
Spinshot II bearings support speeds up to 40,000 min-1 using oil-air lubrication with NT#40 tooling. - Quiet operation
Noise levels reduced by 3-5 dB compared to conventional oil-air lubrication.
The BSR Series provides high precision and ultra-high speeds for shaft diameters of 25 mm or less. This high-performance line is designed to support compact machine tool spindles.
Features
- Ultra-high speeds
BSR Series bearings are specialized to meet the ultra-high speeds required by small machine tool spindles. - Long life
X-type bearings feature heat- and wear-resistant SHX steel for long life in high-speed applications. - High precision
High-precision specifications come standard.
NSKROBUST angular contact ball bearings sustain axial loads under high speeds and with high rigidity.
Features
- High rigidity/low heat generation
The BTR Series features a contact angle of 40° for both high thrust rigidity and low heat generation. - High speeds
The BAR Series features a contact angle of 30° for a boost in high-speed performance.
TAC-F Series angular contact ball bearings are designed to receive axial loads with a particular focus on rigidity.
Features
- High rigidity
A contact angle of 50° is used to enhance rigidity, perfect for highly rigid spindles operating under heavy-duty cutting applications. - User friendly
An inseparable design makes these bearings easy-to-handle.
FAQs
The various series have internal designs specialized for certain applications.Generally, we recommend our Standard Series for precision machinery, the NSKROBUST Series for ultra-high speeds, the BSR Series for small shaft diameters, and the TAC Series for high-rigidity when receiving thrust (axial) loads.
We recommend filling 15 to 30% of the bearing's free internal space with grease.Catalogs
Search our full listing of catalogs for more details.
2D/3D CAD Data
Download 2D & 3D CAD model files and spec. sheets for NSK products through PARTcommunity.
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