Product Overview
The 7006C Angular Contact Ball Bearing is a single-row angular contact ball bearing from the 70 series, designed to accommodate combined radial and axial loads in applications requiring high rotational precision. With a 15° contact angle designated by the “C” suffix, it is optimized for high-speed operation while maintaining axial positioning accuracy. The bearing features a machined phenolic resin cage (TYN) that ensures smooth ball guidance and reduced friction at elevated speeds, and is preloaded to the SUL (light) specification for consistent stiffness in matched-pair or universal mounting arrangements. Manufactured to P4 precision class in accordance with ISO 492, it meets tolerance grade 4 requirements, making it suitable for precision spindles and measuring equipment where runout and vibration control are critical. This 7006C angular contact ball bearing is also available in matched sets for spindle applications requiring preload consistency across multiple bearings.
Technical Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Boundary Dimensions | |||
| Bore Diameter | d | 30 | mm |
| Outside Diameter | D | 55 | mm |
| Width | B | 13 | mm |
| Contact Angle | α | 15 | ° |
| Effective Load Center | a | 12.2 | mm |
| Chamfer Dimension | r (min.) | 1 | mm |
| Chamfer Dimension | r1 (min.) | 0.6 | mm |
| Properties | |||
| Bearing Material | — | GCr15 Bearing Steel | — |
| Cage Material | — | TYN | — |
| Preload | — | SUL (Light) | — |
| Tolerance | — | P4 (ISO Class 4) | — |
| Basic Load Ratings | |||
| Basic Dynamic Load Rating | Cr | 19 | kN |
| Basic Static Load Rating | C0r | 10.1 | kN |
| Speeds | |||
| Grease Lubrication | — | 27,000 | rpm |
| Oil-bath Lubrication | — | 41,000 | rpm |
| Mass | |||
| Mass (approx.) | — | 0.114 | kg |
Manufactured to ISO 492:2023 P4 tolerance classification standard for radial bearing geometrical product specifications.
Features and Benefits
- P4 Precision Tolerance — Meets ISO Class 4 runout and dimensional accuracy standards, ensuring consistent performance in applications that demand minimal vibration and precise shaft positioning.
- Phenolic Resin Cage (TYN) — Lightweight, high-strength cage material reduces centrifugal forces at elevated speeds and provides smooth ball-pocket guidance, extending service life in high-speed spindles.
- 15° Contact Angle (C) — Optimized for axial load capacity at high rotational speeds, delivering a balanced trade-off between load support and speed capability for precision equipment.
- SUL Light Preload — Factory-set preload eliminates internal clearance and ensures consistent stiffness in pair or set mounting, reducing deflection under varying load conditions.
- GCr15 Bearing Steel Rings — Through-hardened chrome steel provides wear resistance and dimensional stability under cyclic loading, maintaining accuracy over extended operating periods.
Applications
Machine Tool Spindles
The 7006C angular contact ball bearing’s P4 precision and grease speed rating of 27,000 rpm make it a natural fit for grinding, milling, and drilling spindles where runout limitations are tight and thermal stability matters. Multiple bearings can be mounted in tandem, back-to-back, or face-to-face arrangements with matched preload for specific stiffness requirements. Browse our full range of angular contact ball bearings for compatible models in other sizes.
Precision Measuring Equipment
Coordinate measuring machines (CMMs), rotary tables, and inspection fixtures benefit from the bearing’s low runout and consistent rotational accuracy, which directly contribute to measurement repeatability.
High-Speed Motors and Drives
Servo motors, spindle drives, and high-speed rotating assemblies operating in the 10,000–27,000 rpm range under grease lubrication can use this 7006C precision bearing for reliable positioning and reduced maintenance intervals.
Quality and Manufacturing
Manufactured to ISO 492:2023 P4 tolerance class, the 7006C bearing undergoes dimensional, runout, and noise testing before dispatch. The GCr15 bearing steel rings are vacuum-degassed for cleanliness, heat-treated to 58–62 HRC hardness, and stabilized for dimensional stability. Cage pocket geometry and ball grade are selected per the P4 specification to ensure consistent torque and vibration characteristics across production batches.
OEM Customization
Customizations including modified preload values, alternative cage materials, or matched sets (pairs or triplets) with specified preload and radial runout orientation can be accommodated for OEM programs. Contact us with your application parameters for a configuration review.
Why Choose Us for 7006C Angular Contact Ball Bearing
We supply precision angular contact ball bearings direct from ISO-certified production lines, offering competitive pricing for both small-quantity qualification orders and volume OEM contracts. With export experience covering over 40 countries and flexible incoterm options (FOB, CIF, EXW), we maintain competitive lead times on standard models including the 7006C. Pre-sales technical support and after-sales service — including documentation, custom packaging, and inspection reports — are included with every order.
- Lead time from stock: 3–7 working days for standard quantities
- MOQ: 10 pieces for initial orders, negotiable for OEM programs
- Samples: Free samples available for qualified OEM evaluation
- Export packaging: Individual boxes + export-grade carton + pallet consolidation for bulk shipments
Frequently Asked Questions
What is the difference between 7006C and 7006AC angular contact bearings?
The “C” suffix denotes a 15° contact angle, while “AC” denotes a 25° contact angle. A 15° contact angle provides higher speed capability and lower axial stiffness, making the C type more suitable for high-speed spindle applications rather than heavy axial loading scenarios.
Can the 7006C be used as a direct replacement for SKF or FAG equivalents?
The 7006C bearing dimensions (30×55×13 mm) and P4 tolerance follow ISO standard boundary dimensions, which are interchangeable across manufacturers. For the specific cage type (TYN phenolic) and preload (SUL), verify the exact OEM specification before substitution.
What is the maximum operating temperature for the 7006C with phenolic resin cage?
Phenolic resin cages (TYN) are rated for continuous operation up to approximately 120 °C (250 °F). For applications exceeding this range, alternative cage materials such as polyamide or brass should be considered.
How should the 7006C bearing be lubricated for a 20,000 rpm spindle application?
For 20,000 rpm operation, a lithium-complex grease with ISO VG 68–100 base oil viscosity is recommended. The bearing’s grease speed rating of 27,000 rpm provides sufficient margin. For oil-bath or oil-air lubrication systems, the speed ceiling extends to 41,000 rpm.
Can 7006C bearings be ordered as a pre-matched pair?
Yes. Universal-mounting 7006C angular contact ball bearings can be supplied as pre-matched pairs (tandem, back-to-back, or face-to-face) with specified preload and runout orientation for machine tool spindle applications.
What is the mass of a single 7006C bearing?
The approximate mass of one 7006C angular contact ball bearing is 0.114 kg (114 grams), consistent with the 30×55×13 mm envelope with a phenolic resin cage.
