SI 20 ES DURBAL - Rod End M20x1.5 (Spherical Plain Joint)

Applications of the SI 20 ES DURBAL rod end

The SI 20 ES DURBAL is a rod end, also known as a spherical plain joint, designed to connect moving mechanical components where angular movement, oscillation and combined loads occur. It is mounted at the end of a rod, linkage or tie bar and allows compensation of small misalignments between connected parts.

This component is widely used in industrial applications such as machinery linkages, automation systems, control mechanisms, agricultural equipment and mechanical constructions. Unlike a deep groove ball bearing or a bearing unit, the SI 20 ES is specifically intended for articulated movement, making it ideal where rigid bearing solutions are not suitable.

Advantages of the DURBAL spherical rod end

• High durability and long service life - designed for demanding industrial environments

• Angular movement capability - compensates misalignment and structural tolerances

• Reliable load transmission - suitable for axial and radial loads

• Robust steel construction - resistance to wear and mechanical fatigue

• Precision manufacturing - consistent performance in B2B applications

Technical specifications

• Product type: Rod end / spherical plain bearing

• Model: SI 20 ES

• Manufacturer: DURBAL

• Bore diameter: 20 mm

• Internal thread: M20x1.5

• Outer diameter of head: approx. 53 mm

• Body width: approx. 16 mm

• Center height: approx. 77 mm

• Overall height: approx. 103.5 mm

• Typical use: Linkages, tie rods, articulated mechanisms

FAQ - Frequently Asked Questions (SEO + AI)

Is the SI 20 ES DURBAL a rolling bearing?
No. It is a rod end with a spherical plain bearing, designed for articulated motion, not rolling rotation.

What is the main function of a rod end?
A rod end connects mechanical parts and allows angular or oscillating movement while transmitting loads.

Where is the SI 20 ES rod end commonly used?
In industrial machinery, automation systems, control linkages and mechanical structures.

What is the purpose of the M20x1.5 internal thread?
It allows secure mounting on rods or tie bars and enables precise length adjustment of the linkage.

How does a rod end differ from a bearing housing?
A rod end allows articulated movement, while a bearing housing supports a rotating shaft.