KOYO 16004 Ball Bearing 20x42x8 mm

KOYO 16004 is a deep groove ball bearing designed for compact industrial systems requiring high rotational speed, low friction, and reliable radial load performance.

Construction and design

The KOYO 16004 deep groove ball bearing belongs to the category of thin-section bearings, optimized for applications where space is limited but performance cannot be compromised. Its open design allows for flexible lubrication options depending on industrial requirements.

This bearing features precision-machined raceways and high-quality steel balls that ensure smooth operation and reduced vibration. The optimized internal geometry supports consistent performance even under continuous operation.

Compared to standard bearings, the 20x42x8 mm configuration offers a slim profile, making it ideal for lightweight assemblies, electric motors, and compact mechanical systems.

Technical specifications

Type: deep groove ball bearing
Manufacturer: KOYO
Model: 16004
Inner diameter: 20 mm
Outer diameter: 42 mm
Width: 8 mm
Design: open
Cage: steel cage
Load type: radial and moderate axial
Precision class: standard industrial

Dimensional compatibility

The KOYO 16004 bearing 20x42x8 mm is commonly searched under dimensional queries such as bearing 20x42x8, thin section ball bearing 20 mm shaft, and compact deep groove bearing 42 mm outer diameter.

Its slim width allows seamless integration into narrow housings, gear assemblies, and precision equipment. This makes it a preferred choice in applications where standard width bearings cannot be installed.

Operational advantages

This deep groove ball bearing ensures:

• low friction and high rotational speed capability
• stable operation under continuous load
• reduced heat generation
• long service life with proper lubrication

Its balanced design supports both radial loads and light axial forces, making it versatile across multiple industrial environments.

Industrial applications

KOYO 16004 is widely used in:

• electric motors and small drives
• automation systems and conveyors
• pumps and compact gear units
• agricultural and light industrial machinery

Thanks to its thin cross-section, it is especially effective in modern equipment where compact engineering is essential.

FAQ

What machines typically use KOYO 16004 bearing
This bearing is commonly used in electric motors, compact gearboxes, and automation systems requiring slim-profile components.

Is KOYO 16004 suitable for high speed applications
Yes, its deep groove design and precision raceways make it suitable for high-speed rotation with low friction.

Can this bearing handle axial loads
It supports moderate axial loads in addition to radial loads, typical for deep groove ball bearings.

What makes 20x42x8 bearings different from standard sizes
The reduced width allows installation in space-constrained assemblies while maintaining performance.

Is lubrication required for this bearing
Yes, as an open bearing it requires external lubrication depending on the application environment.