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Engineers and machine builders working in corrosive, high-speed, or electrically sensitive environments know the frustration of steel bearings that corrode, conduct stray currents, or require constant lubrication. These full ZrO2 ceramic angular contact ball bearings are designed for exactly those conditions — delivering reliable rotary performance where conventional steel bearings fall short.
Each bearing is constructed entirely from zirconia (ZrO2) ceramic — inner ring, outer ring, and rolling elements — with no metallic components. Available in 17 size variants spanning the 7000 and 7200 series, with bore diameters from 10 mm (0.39 in) to 40 mm (1.57 in) and outer diameters from 26 mm (1.02 in) to 80 mm (3.15 in). Angular contact geometry supports combined radial and axial loads simultaneously.
Typical applications include CNC spindle assemblies requiring non-magnetic bearings, chemical processing pumps exposed to aggressive media, food and beverage equipment where lubrication contamination is a concern, and medical or laboratory instruments where electrical isolation is critical. The angular contact design also suits paired-mounting configurations in precision machine tool spindles.
Inner ring, outer ring, cage, and balls are all ZrO2 ceramic — no steel components. Eliminates galvanic corrosion risk and makes the bearing fully non-magnetic and electrically non-conductive.
Designed to carry combined radial and axial loads. The contact angle allows simultaneous thrust and radial force transmission, making these suitable for spindle and precision positioning applications.
ZrO2 ceramic is inert to most acids, alkalis, and solvents. Suitable for wet environments, washdown conditions, and exposure to aggressive process media where steel bearings would corrode rapidly.
Full ceramic construction provides inherent electrical insulation. Prevents stray current damage in variable-frequency drive (VFD) motor applications and eliminates interference in sensitive electronic equipment.
ZrO2 has a lower coefficient of thermal expansion than steel, reducing preload variation at elevated temperatures. Supports higher DN values compared to equivalent steel angular contact bearings.
Covers bore sizes from 10 mm to 40 mm across both series. Select the exact designation (7000–7007 or 7200–7208) to match your existing housing without modification.
| Bearing Type | Angular Contact Ball Bearing |
|---|---|
| Material | Full Zirconia Ceramic (ZrO2) — rings, balls, and cage |
| Series Available | 7000 series (7000–7007) and 7200 series (7200–7208) |
| Bore Diameter (ID) Range | 10 mm – 40 mm (0.39 in – 1.57 in) |
| Outer Diameter (OD) Range | 26 mm – 80 mm (1.02 in – 3.15 in) |
| Width Range | 8 mm – 18 mm (0.31 in – 0.71 in) |
| Contact Angle | See variant options |
| Dynamic Load Rating | See variant options |
| Static Load Rating | See variant options |
| Lubrication | Dry / grease-compatible (ceramic is self-lubricating at moderate speeds) |
| Operating Temperature | Typically –40°C to +300°C (–40°F to +572°F) |
| Electrical Conductivity | Non-conductive (insulating) |
| Magnetic Properties | Non-magnetic |
| Corrosion Resistance | Resistant to most acids, alkalis, and solvents |
| Packing Quantity | 1 Pcs per order (select size above) |
Match the bearing designation (e.g., 7204) to your housing bore diameter, outer diameter, and width. These dimensions are listed in each variant name — for example, 7204 (20×47×14 mm) means 20 mm bore, 47 mm OD, 14 mm width. Cross-reference with your housing drawing or the existing bearing label before ordering.
Both series share the same bore diameter for a given designation number, but the 7200 series has a larger outer diameter and greater width, providing higher load capacity. For example, 7004 (20×42×12 mm) vs. 7204 (20×47×14 mm). Choose the 7200 series when your housing accommodates the larger envelope and you need higher radial or axial load ratings.
ZrO2 ceramic has inherently lower friction than steel and can operate with minimal lubrication at moderate speeds. For high-speed or high-load applications, a compatible grease (PTFE-based or ceramic-compatible) is recommended to extend service life. Avoid petroleum-based greases that may degrade at elevated temperatures.
Yes. Angular contact ball bearings are specifically designed to carry combined radial and axial loads. For pure axial load applications or heavy thrust loads, mounting in pairs (face-to-face DB or back-to-back DF arrangement) is standard practice. Contact us to confirm the appropriate preload and mounting configuration for your load case.
Yes. Full ceramic bearings are electrically non-conductive, which prevents the bearing current damage (pitting and fluting) commonly caused by stray currents in variable-frequency drive (VFD) motor applications. They are a direct solution for motors where insulated bearings are specified.
ZrO2 ceramic is resistant to most chemical environments but can be susceptible to impact shock loads and thermal shock (rapid temperature cycling). Avoid applications with heavy impact loading, severe vibration without damping, or rapid quenching. For extreme shock conditions, consider hybrid ceramic bearings (ceramic balls with steel rings) instead.
Full ceramic angular contact bearings follow the same ISO dimensional standards as steel bearings of the same designation. A 7204 ceramic bearing has identical outer envelope dimensions to a steel 7204 bearing, so it is a drop-in replacement dimensionally. Verify the tolerance class (P0/P5/P6) matches your housing fit requirement — contact us if you need a specific tolerance class.
