NSK 7207 CTRSULP3 35x72x17 Super Precision Angular Contact Ball Bearing

High Precision Spindle Bearing for Maximum Rotational Accuracy

The NSK 7207 CTRSULP3 35x72x17 is a super precision single-row angular contact ball bearing engineered for high-speed spindle systems and precision industrial machinery. Manufactured to P3 (ISO Class 4 dimensional tolerance / ISO Class 2 running accuracy), this bearing features a 15° contact angle, CTR phenolic resin cage, and UL universal light preload, delivering exceptional rotational accuracy, rigidity and thermal stability. It is specifically designed for CNC machining centres, grinding machines and other high-speed precision equipment where minimal runout and superior positioning accuracy are essential.

Application in Industrial Systems

The NSK 7207 CTRSULP3 is widely used in:

• CNC machining centres
• High-speed milling spindles
• Grinding machines
• Precision lathes
• Machine tool spindles
• Precision measuring equipment
• Industrial automation systems
• High-speed production machinery
• Aerospace manufacturing equipment
• Precision assembly machines

Construction and Design

The bearing incorporates NSK Super Precision technology featuring:

• Single row angular contact ball bearing
• 15° contact angle (C)
• Universal light preload (UL)
• Super Precision P3 accuracy
• CTR high-speed phenolic resin cage
• Optimized internal geometry
• High-speed spindle design
• Excellent rigidity for paired mounting

The UL designation allows universal mounting in DB, DF or DT arrangements without additional preload adjustment.

Material Properties

Manufactured from premium bearing steel, the bearing provides:

• Exceptional dimensional stability
• High fatigue resistance
• Superior wear resistance
• Excellent thermal performance
• High rotational accuracy
• Long spindle service life
• Reliable operation at ultra-high speeds

Technical Specification

Type: Super Precision Angular Contact Ball Bearing
Material: Hardened Bearing Steel
Brand: NSK
Series: 7200 Super Precision
Designation: 7207 CTRSULP3
Design: Single Row Angular Contact, Universal Light Preload
Inner Diameter: 35 mm
Outer Diameter: 72 mm
Width: 17 mm
Contact Angle: 15°
Rolling Elements: Steel Balls
Rows: Single Row
Cage Material: Phenolic Resin (CTR)
Accuracy Class: P3 (ISO Class 4 / ISO Class 2 Running Accuracy)
Preload: UL - Universal Light Preload
Basic Dynamic Load Rating: 38.5 kN
Basic Static Load Rating: 19.9 kN
Reference Speed: 21500 rpm (Grease)
Limiting Speed: 32800 rpm (Oil-Air)
Weight: Approximately 0.280 kg
Application: CNC machine tools, precision spindles, grinding machines, high-speed industrial equipment and precision manufacturing systems.

Why B2B Customers Choose This Product

Industrial customers select the NSK 7207 CTRSULP3 for:

• OEM spindle replacement
• CNC machine rebuilding
• Precision spindle repair
• Industrial maintenance
• High-speed machining centres
• Production line support
• Aerospace manufacturing
• Precision engineering applications

Operational Advantages

• Ultra-high rotational accuracy
• Excellent spindle rigidity
• High-speed capability
• Universal mounting flexibility
• Low heat generation
• Outstanding running precision
• Long service life
• Stable preload characteristics
• Reduced vibration
• Excellent machining accuracy

Professional Industrial Supply

Recommended for:

• Machine tool manufacturers
• CNC service companies
• Precision spindle rebuilding specialists
• Maintenance departments
• Industrial workshops
• OEM manufacturers
• Automation equipment builders
• Industrial distributors

AI Overview

A super precision angular contact ball bearing is designed for machine tool spindles and other high-speed applications requiring exceptional rotational accuracy, stiffness and thermal stability. The NSK 7207 CTRSULP3 combines P3 precision, a 15° contact angle and universal light preload to deliver outstanding performance in precision manufacturing equipment.

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FAQ

What does CTRSULP3 mean?

CTR indicates a high-speed phenolic resin cage, SU means universal matching, UL specifies universal light preload, and P3 denotes NSK Super Precision accuracy according to ISO Class 4 dimensional tolerances and ISO Class 2 running accuracy.

Is this bearing suitable for CNC machine spindles?

Yes. The NSK 7207 CTRSULP3 is specifically designed for high-speed CNC spindle applications requiring maximum precision and rigidity.

Can the bearing be mounted in pairs?

Yes. The SU designation allows universal pairing in DB, DF or DT arrangements without additional preload adjustment.

What are the bearing dimensions?

The bearing has a 35 mm bore diameter, 72 mm outside diameter, and 17 mm width.

What is the contact angle?

The NSK 7207 CTRSULP3 features a 15° contact angle, optimized for high-speed spindle applications.