Ball Bearing Bush for Rotary and Linear Motion

1.3505 (100Cr6) Steel and Brass Material Selection Guide

Introduction to Ball Bearing Bushes

A Ball Bearing Bush, also referred to as a Rotary Ball Bearing Bush or Linear Ball Bearing Bush, is widely used in industrial automation, machine tools, and precision motion systems.
Choosing the correct ball bearing bush material is essential for ensuring smooth operation, long service life, and reliable load performance.

This guide explains why the combination of 1.3505 (EN 100Cr6) bearing steel and Brass is a proven material solution for both rotary and linear ball bearing bushes.

Structure and Key Components of a Ball Bearing Bush

A standard ball bearing bush consists of the following functional parts:

• Steel balls for rolling motion

• Hardened raceways for load transmission

• Ball cage or retainer for ball guidance

• Bearing bush or sleeve housing

Each component requires a specific material to meet mechanical and tribological demands.

1.3505 (EN 100Cr6) Bearing Steel for Rolling Elements

Application of 1.3505 in Ball Bearing Bushes

1.3505 bearing steel is primarily used for:

• Ball bearing steel balls

• Inner and outer raceways

• All rolling contact surfaces under high load

Advantages of 1.3505 Bearing Steel

1.3505 steel ensures that the ball bearing bush can withstand continuous rolling contact and high mechanical stress.

Brass Material for Ball Cage and Bearing Bush

Why Brass Is Used in Ball Bearing Bush Design

Brass bearing bushes and cages offer important functional advantages:

Brass acts as a protective and stabilizing material, reducing friction-related failures between steel balls.

Rotary Ball Bearing Bush Material Configuration

Material Selection for Rotary Applications

For rotary motion systems, key performance requirements include rotational speed, noise control, and durability.

Recommended material combination:

• Balls and raceways: 1.3505 (100Cr6) bearing steel

• Ball cage and bush: Brass (CuZn30, CuZn39Pb3 or equivalent)

This configuration ensures stable rotation and extended bearing life.

Linear Ball Bearing Bush Material Configuration

Material Selection for Linear Motion Systems

Linear ball bearing bushes operate under repeated reciprocating motion and are more sensitive to contamination.

Recommended material combination:

• Steel balls: 1.3505 bearing steel

• Raceways: 1.3505 or hardened steel

• Cage and housing: Brass for improved anti-jamming performance

Brass is particularly suitable for linear guide systems exposed to dust or vibration.

Typical Applications of Ball Bearing Bushes

• Linear motion guide systems

• Industrial automation equipment

• CNC machines and machine tools

• Sliding tables and actuators

• Precision mechanical equipment

Summary: Best Material Solution for Ball Bearing Bushes

1.3505 bearing steel provides load capacity and wear resistance.
Brass ensures smooth operation, stability, and protection against seizure.

The combination of 1.3505 (100Cr6) steel and Brass represents a mature, reliable, and industry-proven solution for both rotary and linear ball bearing bushes.

Why Choose 1.3505 and Brass Ball Bearing Bushes?

• Long service life under high load

• Reduced friction and noise

• Stable performance in industrial environments

• Suitable for rotary and linear motion applications

For precision motion systems, ball bearing bushes made from 1.3505 bearing steel and Brass remain the optimal material choice.