1621-ZZ Ball Bearing

The 1621-ZZ Ball Bearing is a deep groove ball bearing with double metal shields engineered for industrial applications requiring efficient rotation, low mechanical resistance, and dependable continuous operation.

Manufactured from chrome steel and supplied factory pre-lubricated, this model combines mechanical durability with stable performance in rotating equipment. The ZZ configuration uses metal shields on both sides of the bearing to help reduce light debris contamination while maintaining excellent high-speed capability. (pgnbearings.com)

What is the 1621-ZZ Ball Bearing

The 1621-ZZ belongs to the deep groove ball bearing category, one of the most widely used bearing types in industrial applications due to its versatility and operational efficiency.

The “ZZ” designation refers to double metal shields. This protection style helps reduce contamination from dust and light debris without creating the additional drag commonly associated with rubber seals. As a result, ZZ bearings are commonly used in higher RPM applications with lower moisture exposure. (SKF)

Applications for the 1621-ZZ Bearing

The 1621-ZZ can be used in a variety of industrial and mechanical systems, including:

• Electric motors
• Industrial pumps
• Fans and blowers
• CNC machinery
• Agricultural equipment
• Power tools
• Conveyor systems
• Automated equipment

Additionally, ZZ bearings are widely used in systems requiring high rotational speed and smooth operation. (NSK)

Benefits of the 1621-ZZ Ball Bearing

Lower rotational resistance

The metal shields help maintain low operational friction for high-speed applications.

Protection against light debris

The ZZ configuration helps reduce contamination from dust and small particles.

Stable operation

Deep groove bearing design supports smooth rotation, reduced vibration, and efficient mechanical performance.

Chrome steel construction

Chrome steel provides mechanical durability and dependable performance for industrial environments.

When to Use a ZZ Bearing

ZZ bearings are typically recommended for:

• Low-moisture environments
• Higher RPM applications
• Systems requiring lower friction
• Continuous-use equipment

Meanwhile, 2RS bearings are generally preferred for wet environments or applications exposed to heavier contamination.

Maintenance Tips

To maximize bearing service life, it is recommended to:

• Check shaft alignment
• Avoid excessive impact loads
• Monitor operating temperature
• Inspect abnormal noise
• Keep the system clean

These practices help preserve performance and reduce premature wear.

PGN Bearings Product Line

PGN Bearings supplies industrial components for rotating systems and mechanical applications. The product line includes ball bearings, roller chains, pillow block bearings, steel balls, and additional products designed for dependable performance and operational reliability.

FAQ

What does ZZ mean on a bearing?

“ZZ” indicates metal shields on both sides of the bearing. (SKF)

Is the 1621-ZZ suitable for high-speed applications?

Yes. ZZ bearings typically provide lower friction and improved high-speed performance.

Does this bearing come pre-lubricated?

Yes. The bearing comes factory pre-lubricated.

What is the difference between ZZ and 2RS bearings?

ZZ bearings use metal shields for lower rotational resistance, while 2RS bearings use rubber seals for greater moisture protection.

Can the 1621-ZZ be used in electric motors?

Yes. This model is commonly used in motors, fans, and industrial rotating equipment.