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Silicon Nitride Ceramic Self-Aligning Ball Bearing with PEEK Cage.
The CE-2204-Si3N4-PEEK is a high-precision full ceramic self-aligning ball bearing. It features Si₃N₄ (silicon nitride) rings and balls paired with a PEEK cage. The double-row self-aligning structure allows the bearing to accommodate angular misalignment between the shaft and housing, reducing operational stress in flexible mounting configurations.
With the standard 2204 envelope (20 mm bore, 47 mm outside diameter, 18 mm width), it provides a dimensional basis for evaluating replacements of standard steel 2204 bearings in specialized applications. However, material differences in thermal expansion and fit must be reviewed by engineering teams prior to substitution.
Need a CE-2204-Si3N4-PEEK bearing for your application?
Send TOJO your requirements for a technical evaluation and quotation.
| Parameter | Specification |
|---|---|
| Bearing No. | CE-2204-Si3N4-PEEK |
| Bearing Type | Self-Aligning Ball Bearing (Full Ceramic, Double Row) |
| Rings & Balls Material | Si₃N₄ (Silicon Nitride) |
| Cage Material | PEEK (Polyetheretherketone) |
| Seal Type | Open |
| Bore Diameter (d) | 20 mm |
| Outside Diameter (D) | 47 mm |
| Width (B) | 18 mm |
| Chamfer Radius (r) | 1 mm |
| Mounting Dimension (da / Da / ra) | 25 mm (min) / 42 mm (max) / 1 mm (max) |
| Reference Weight | ~0.057 kg (57 g) |
| Basic Dynamic Load Rating (Cr) | 8.96 kN |
| Basic Static Load Rating (C0r) | 2.31 kN |
| Maximum Speed (reference) | ~16,000 RPM |
| Temperature Range | -80°C to +250°C (PEEK cage limit) |
| Tolerance Class | ISO Normal (P0) standard; higher grades available |
Si₃N₄ provides high hardness, low density, and excellent thermal shock resistance. The material is non-magnetic and electrically insulating, helping prevent electrical current passage in sensitive equipment.
The double-row self-aligning design accommodates angular misalignment between the shaft and housing. This reduces mechanical stress and extends service life in systems subject to shaft deflection or mounting inaccuracies.
The PEEK cage provides structural support and reliable ball guidance. It offers excellent chemical resistance and dimensional stability at elevated temperatures, establishing the continuous operating limit of +250°C.
With boundary dimensions of 20×47×18 mm, the bearing serves as a dimensional replacement candidate for standard 2204 applications. Clearance, fit, and load characteristics must be evaluated prior to substitution.
● Precision Machinery — Selected mechanisms requiring misalignment tolerance and dimensional stability.
● Chemical & Food Processing — Pumps and mixers exposed to aggressive media, benefiting from the PEEK cage's chemical resistance.
● Semiconductor & Cleanroom — Wafer handling and vacuum equipment where non-magnetic and non-conductive components are required.
● Aerospace Equipment — Selected actuators and flight control systems requiring lightweight stability.
TOJO BEARING COMPANY specializes in special-material bearing development. If the standard CE-2204-Si3N4-PEEK configuration does not match your equipment, our engineering team can evaluate the following:
Bearing dimensions
Ceramic material
Cage material
Radial clearance
Precision grade
Lubrication conditions
The CE-2204-Si3N4-PEEK follows the standard 2204 boundary dimensions (20×47×18 mm). However, because Si₃N₄ and steel differ in elastic modulus, thermal expansion, and load ratings, direct substitution requires engineering review. Please provide shaft/housing fits and operating loads for evaluation.
The PEEK cage offers excellent chemical compatibility and structural stability up to +250°C. It is the limiting factor for the bearing's maximum operating temperature.
The open design and Si₃N₄ materials may support dry-running in selected applications. However, the self-aligning structure and double-row configuration introduce specific contact dynamics. Lubrication conditions and speeds should be evaluated by TOJO engineering.
Si₃N₄ (silicon nitride) offers higher hardness, better thermal shock resistance, and lower density, making it preferred for high-temperature and high-speed applications. ZrO₂ (zirconia) offers higher fracture toughness and is often chosen for corrosive environments.
Send TOJO your operating conditions, load, and speed requirements. Our engineering team will evaluate your self-aligning ceramic bearing application and provide a technical recommendation and quotation.
Request a Technical Evaluation →
TOJO BEARING COMPANY — Our Bearings, Your Solutions.
Our bearings, Your solutions!
NO.23 JIAHE ROAD XIAMEN CHINA
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