Cases

Sealed Angular Contact Ball Bearings

1. What is the Sealed Angular Contact Ball Bearing?

A Sealed Angular Contact Ball Bearing is a high-precision bearing designed to handle both radial (sideways) and significant axial (thrust) loads simultaneously, featuring integrated seals to keep contaminants out and lubricant in, making them ideal for high-speed, demanding applications needing rigidity and long life, like machine tools or pumps. 

2. Features of the Sealed Angular Contact Ball Bearing

Parameter	Open AC Bearing	Sealed AC Bearing	Improvement
Contamination Protection	None	IP65-equivalent	Complete dust/moisture barrier
Lubrication Retention	Requires regular maintenance	Factory-filled, permanent	Lifetime lubrication
Maintenance Interval	500–2,000 hours	20,000+ hours	10–40× longer
Operating Temperature	-30°C to +120°C	-40°C to +150°C	Wider range
Speed Capacity	High	Optimized for sealed design	85–95% of open bearing speed
Installation Simplicity	Requires separate seals	Integrated sealing	Faster assembly
Cost of Ownership	Higher (maintenance)	Lower (maintenance-free)	Reduced TCO

3. Applications of the Sealed Angular Contact Ball Bearing

1. Electric Motors & Servo Motors

Servo motors

Variable-frequency motors

Compact high-speed motors

Sealed designs keep grease clean and ensure long service life without relubrication.

2. Pumps & Compressors

Centrifugal pumps

Vacuum pumps

Refrigeration compressors

They handle combined loads while preventing leakage and contamination.

3. Machine Tools

Spindle units

Tool changers

Feed drive systems

Sealed angular contact bearings maintain precision and reduce maintenance.

4. Robotics & Automation Equipment

Robot joints

Rotary actuators

Positioning modules

Compact size and sealed construction improve reliability in automated systems.

5. Gearboxes & Transmission Systems

Industrial gear reducers

Precision gearboxes

Planetary gear systems

They support axial loads generated by gears while keeping lubrication intact.

6. Medical Equipment

Imaging equipment

Laboratory automation systems

Surgical devices

Quiet operation and clean, maintenance-free performance are critical advantages.

7. Aerospace & Defense Equipment

Actuators

Control mechanisms

Instrumentation systems

Sealed bearings provide reliability in controlled or harsh environments.

8. Packaging & Printing Machinery

High-speed rollers

Feed mechanisms

Printing cylinders

Protection from dust and ink contamination extends bearing life.

9. Semiconductor & Electronics Manufacturing

Wafer handling equipment

Inspection and positioning stages

Sealed bearings reduce particle generation and maintenance.

10. General Industrial Machinery

Conveyors

Fans and blowers

Automation modules

4.How to Choose the Sealed Angular Contact Ball Bearing?

Choose Open Angular Contact Bearing if:  

Operating environment is clean and controlled.  

Regular maintenance access is available.  

Maximum possible speed is required.  

Cost-sensitive initial purchase.

Choose Sealed Angular Contact Ball Bearing if:  

Environment contains dust, moisture, or chemicals.  

Maintenance access is difficult or expensive.  

Long service life without intervention is needed.  

Cleanliness is critical

Seal Configuration Options:  

RS (Rubber Seal): Single-side contact seal for moderate protection.  

2RS: Double-side contact seals for full protection.  

Specialty Seals: Viton, PTFE, or metal shields for extreme conditions.

5.Price of the Sealed Angular Contact Ball Bearing

Open Angular Contact Bearing: Base price factor 1.0× plus additional sealing costs.  

Sealed Angular Contact Ball Bearing: 1.3–1.8× price factor, including integrated sealing and lubrication.

6.Manufacturer of the Sealed Angular Contact Ball Bearing

Manufacturer: Precision Sealed Bearing Technologies

Quality Assurance:  

100% seal integrity testing  

Lubricant quantity and distribution verification  

Vibration analysis per ISO 15242-2  

Accelerated life testing  

Material certifications

Customization Support:  

Special seal materials

Food-grade or high-temperature lubricants  

Corrosion-resistant coatings  

Preload adjustment for specific applications

Additional Services:  

Application engineering support  

Installation training  

Condition monitoring recommendations  

Global technical service network