16004 C3 KOYO Ball Bearing 20x42x8 mm

16004 C3 KOYO Deep Groove Ball Bearing 20x42x8 mm

16004 C3 KOYO is a deep groove ball bearing with increased internal clearance, engineered for high-speed industrial applications where thermal expansion and continuous operation require enhanced performance stability.

Technical specifications

Type: deep groove ball bearing
Manufacturer: KOYO
Model: 16004 C3
Inner diameter: 20 mm
Outer diameter: 42 mm
Width: 8 mm
Internal clearance: C3 increased clearance
Design: open
Cage: steel cage
Load type: radial and moderate axial
Material: bearing steel
Operating temperature: -20 to +150 C

Industrial applications

The KOYO 16004 C3 deep groove ball bearing is widely used in compact industrial systems where both speed and thermal resistance are critical. Typical applications include:

• electric motors and high-speed drives
• automation systems and conveyor units
• pumps, fans, and ventilation systems
• light industrial machinery and gear assemblies

Its thin-section design makes it ideal for installations with limited axial space.

Construction and design

This 20x42x8 deep groove ball bearing belongs to the thin-section bearing category, providing a reduced width while maintaining high load capacity and precision.

The C3 internal clearance allows for compensation of thermal expansion during operation, preventing excessive preload and reducing friction under high-speed conditions. Precision-ground raceways and high-quality steel balls ensure smooth rotation, minimal vibration, and extended service life.

The open design allows flexible lubrication depending on operating conditions, making it suitable for various industrial environments.

Dimensional compatibility

The bearing 20x42x8 mm is frequently searched as:

• deep groove ball bearing 20x42x8
• thin section bearing 20 mm shaft
• compact bearing 42 mm outer diameter
• 16004 C3 bearing

Its slim 8 mm width enables installation in narrow housings, compact motors, and precision assemblies where standard bearings cannot be used.

Operational advantages

The KOYO 16004 C3 bearing delivers:

• high rotational speed capability
• improved performance under elevated temperatures
• reduced friction and energy loss
• stable operation under dynamic loads
• extended service life with proper lubrication

Compared to standard clearance bearings, the C3 version performs better in demanding environments with heat and speed variations.

FAQ

What does C3 clearance mean in 16004 KOYO bearing
C3 indicates increased internal clearance, allowing better performance at high speeds and temperatures.

Is this bearing suitable for high-speed applications
Yes, the design and clearance make it ideal for high-speed rotating equipment.

What loads can this bearing support
It supports primarily radial loads and moderate axial loads typical for deep groove ball bearings.

Is 16004 C3 bearing sealed
No, it is an open bearing and requires external lubrication.

Where is 20x42x8 bearing commonly used
It is commonly used in electric motors, pumps, automation systems, and compact industrial machines.