Super Precision Angular Contact Ball Bearings
Overview
NMT 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 NMTROBUST™ high-performance bearings for both high rigidity and ultra-high speeds
Product List
NSK's standard super precision angular contact ball bearings conform to ISO standards.
Features
- Long-life materials
NSK's Z steel, a long-life bearing steel, is used as standard material. - Seals for even longer life
Series 70 and 79 offer over 1.5x longer grease life than that of open bearings thanks to the included seals. - Cage options
Two types of cages are available to suit your application.
NMTROBUST bearings were developed using NMT’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 NMTROBUST 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.
NMTROBUST 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
Loads are defined by their direction. Loads perpendicular to the shaft are called radial loads and loads parallel to the shaft are called axial (thrust) loads.
While DGBBs can handle axial loads in both directions, single-row angular contact ball bearings can only receive axial load in one direction.
Seals and shields offer additional protection for bearing components and help to improve and maintain lubrication. In terms of sealing performance, sealed bearings rank best, followed by shielded bearings, then finally open bearings. NMT uses supplementary designations D, DU, DW, and V (DD, DDU, DDW, VV) for sealed bearings and Z (ZZ) for shielded bearings. No supplementary designations are listed for open bearings.
