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High-precision zirconia ceramic bearing for extreme conditions and high-speed applications.
The 7306 ZrO₂ (zirconia) Angular Contact Ball Bearing is a high-precision ceramic bearing designed to excel in extreme conditions. Made of yttria-stabilized zirconia (Y-TZP), it offers corrosion and wear resistance, low density, and electrical insulation, making it suitable for demanding applications where conventional steel bearings may fall short.
With a 30 mm bore, 72 mm outside diameter and 19 mm width, this zirconia bearing is suitable for selected aerospace, medical, semiconductor and high-speed spindle applications. Its 15°–40° contact angle design provides combined radial and axial load capability with high-speed performance up to 1.5× that of steel bearings.
Need a 7306 ZrO₂ bearing for your application?
Send TOJO your requirements for a technical evaluation and quotation.
| Parameter | Specification |
|---|---|
| Bearing No. | 7306 |
| Bearing Type | Angular Contact Ball Bearing |
| Material | ZrO₂ Ceramic |
| Bore Diameter (d) | 30 mm |
| Outside Diameter (D) | 72 mm |
| Width (B) | 19 mm |
| Minimum Chamfer Radius (r) | 1.1 mm |
| Minimum Chamfer Radius (r1) | 0.6 mm |
| Mounting Dimension (da min.) | 37 mm |
| Mounting Dimension (Da max.) | 65 mm |
| Maximum Fillet Radius (ra max.) | 1 mm |
| Reference Weight | 0.27 kg |
Yttria-stabilized zirconia provides corrosion and wear resistance, low density, and electrical insulation. Ideal for harsh environments where steel bearings would degrade.
Angular contact design handles combined radial and axial loads. High-speed capability up to 1.5× that of steel bearings. Contact angle, preload and arrangement can be selected per application.
Operates from -200°C to +600°C with minimal thermal expansion. No lubrication needed in vacuum environments, reducing maintenance requirements.
ZrO₂ is electrically insulating and non-magnetic, preventing arcing damage and electrolytic corrosion in electrical, semiconductor and precision equipment applications.
The lower density of ZrO₂ reduces centrifugal forces, enabling high rotational speeds with reduced heat generation. Available in high-precision grades for demanding rotational accuracy.
*Actual operating temperature and speed limits should be confirmed according to the complete bearing configuration and application conditions.
● Aerospace — actuators, gyroscopes, flight control systems and lightweight instrumentation.
● Medical & Dental Equipment — surgical handpieces, CT scanners, centrifuges and precision medical instruments.
● Semiconductor & Cleanroom — wafer handling, vacuum robots and precision equipment.
● High-Speed Spindles — CNC, grinding and PCB drilling applications.
TOJO BEARING COMPANY specializes in special-material bearing development, manufacturing and application support. Application-specific solutions can be evaluated according to:
Bearing dimensions
Ceramic material
Contact angle
Cage material
Lubrication
Preload
Precision requirements
Temperature
Speed
If the standard 7306 configuration does not meet your requirements, send TOJO your operating conditions and bearing specifications for evaluation.
The 7306 has a 30 mm bore, 72 mm outside diameter and 19 mm width, with a reference weight of approximately 0.27 kg.
Yes. As an angular contact ball bearing, it is designed for combined radial and axial loading. Actual load capacity depends on the bearing configuration and operating conditions.
Yes, suitable ZrO₂ configurations can be evaluated for high-temperature applications. TOJO indicates an approximate -200°C to +600°C range, depending on the complete bearing configuration.
Yes. TOJO can evaluate material, dimensions, contact angle, cage, lubrication, preload, precision and operating-environment requirements.
Looking for a 7306 ZrO₂ Angular Contact Ball Bearing? Send us your:
● Required quantity
● Application
● Speed
● Radial and axial load
● Operating temperature
● Lubrication conditions
● Environmental requirements
● Precision requirements
TOJO engineers can evaluate your application and recommend a suitable ZrO₂ ceramic bearing configuration.
TOJO BEARING COMPANY — Our Bearings, Your Solutions.
Our bearings, Your solutions!
NO.23 JIAHE ROAD XIAMEN CHINA
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