High Speed and Precision
NSK High-Precision Ball Bearings for Machine Tools
NSK high-precision ball bearings are specifically engineered to meet the rigorous demands of modern machine tools, where accuracy, high rotational speeds, and thermal stability are paramount. This range includes the world-renowned ROBUST series, designed for ultra-high-speed applications with minimal temperature rise. Whether you require standard ISO-compliant precision bearings or specialised hybrid variants with ceramic balls for extreme performance, our portfolio ensures maximum machine uptime and competitiveness. Corsair Sarl is a leading supplier of high-quality NSK precision bearings, providing expert support and fast Swiss delivery to ensure your production processes remain precise and efficient.
Applications and Use
These bearings are essential for high-accuracy industrial environments where standard bearings cannot meet speed or precision requirements.
Common applications include:
Machine Tool Spindles
Primarily used in milling, grinding, and lathe spindles.
High-Speed Motors
Ideal for electric motors requiring low vibration and high rotational accuracy.
Precision Tooling
Suitable for ultra-precision machining applications.
Ball Screw Support
Specialised series (BSBD, TAC) for high axial load capacity in ball screw drives.
Downloads (PDF)
NSK Hochgenauigkeitslager für Werkzeugmaschinen
Key specifications are also summarised on this page.
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Quick Selection: Open vs Sealed vs High-Speed
Standard Precision (Offene Ausführung)
Open bearings are the base ISO-standard precision bearings (Series 70xx, 72xx, 79xx) used when external lubrication systems are provided.
Sealed Precision (Abgedichtet – V1V)
Sonderserie bearings are pre-lubricated and equipped with non-contact rubber seals (V1V). These are designed to reduce handling issues and are ideal for spindle maintenance.
Ultra-High Speed (ROBUST Series)
The ROBUST BNR, BER and BSR series are designed for ultra-high-speed machining with minimal heat generation. They are available with direct air-oil lubrication via holes in the outer ring (Robustshot) for maximum performance.
Standards, Naming, and Interchangeability
How to identify your bearing
Basic Code: Usually 4 digits beginning with 7 (e.g., 7010).
Series Code: 9 = Series 19, 0 = Series 10, 2 = Series 02.
Contact Angle: 15° (C/BSR), 18° (BNR), 25° (A5/BER), or 30° (A/BAR).
Ball Material: Steel (Standard) or Ceramic (SN24).
Precision Class: P2 (ISO Class 2), P4 (ISO Class 4), or P3 (ISO 4 dimensions with ISO 2 runout).
Internal Clearance and Preload
Preload Suffixes: EL (Extraleight), L (Light), M (Medium), H (High).
Arrangement: SU (Single Universal), DU (Double Universal), DB (Back-to-back), DF (Face-to-face).
Materials, Coatings, and Related Options
Standard Steel
High-purity SUJ2 bearing steel.
High-Performance Steel (SHX)
Heat-resistant steel for ultra-high-speed operation (Standard in ROBUST ‘X’ types).
Hybrid Bearings
Steel rings combined with Ceramic balls ($Si_3N_4$Si3N4) for lower centrifugal force and higher speeds.
Cage Options
*Polyamide (TYN): Best for grease lubrication and quiet operation.
Phenolic Resin (TR/T): Standard for high-speed spindle applications.
PEEK/PPS (TSR): Used in ROBUST series for ultra-high speeds and low temperature rise.
How to Request a Quote Quickly
To provide an accurate quote, please include the following in your enquiry:
- Full Bearing Reference (e.g., 7010 A5 SN24 TR V1V SU EL P3).
- Quantity.
- Application Details (Speed, load, and whether it is a replacement for an existing spindle).
- Lubrication Type (Grease or Air-Oil).
- Delivery Location and required date.
Call for availability and a quote
Phone
+41 32 737 70 60
Email
sales@corsairsarl.com
Opening hours
Monday – Friday, 8:00 am – 5:00 pm
FAQ
What is the difference between BNR and BER bearings?
The difference lies in the contact angle: BNR has an 18° contact angle, while BER has a 25° angle.
When should I use ceramic balls (SN24)?
Ceramic balls are recommended for ultra-high speeds and applications requiring high rigidity and low thermal expansion.
What is 'Robustshot'?
obustshot is a series featuring a lubrication groove and O-rings in the outer ring, allowing direct air-oil lubrication for the highest possible rotational speeds.
Can I replace an SKF or FAG bearing with NSK?
Yes. For example, an NSK 70xxA5 matches an SKF 70xxACD or FAG B70xxE. Please share your current reference for a confirmed cross-reference.
What does 'V1V' mean?
V1V indicates that the bearing is equipped with non-contact rubber seals, which protect against contamination without increasing friction.
Call for availability and a quote
Phone
+41 32 737 70 60
Email
sales@corsairsarl.com
Opening hours
Monday – Friday, 8:00 am – 5:00 pm
- Large stock list
- Prompt Swiss delivery
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- Expert technical assistance