Types, properties and utilization of retaining rings

The retaining ring is one of the most important tools in construction. It is used to secure individual components and prevent axial movement. In this article, we will take a look at the different types of retaining rings, their features and their utilization.

Retaining rings for shafts and bores

Retaining rings are standard parts that are specified and manufactured based on normative specifications. Retaining rings are used to prevent axial position shifts of components mounted on a shaft or in a bore. At both ends there are brackets with a bore, so that the retaining ring can be mounted and dismantled using a tool.

There are basically two types of classic retaining rings.

  • Retaining rings for shafts (outer rings)
  • Retaining rings for bores (inner rings)

Features of retaining rings

Retaining rings have a number of different properties that make them unique. For example, they are usually made of high-quality metal or plastic, making them robust and durable. They are also very easy to install and remove, making them ideal for use in applications where quick assembly is required.

  • Retaining rings are small metal rings used to hold gear wheels, bolts and screws in place.
  • They are used to ensure that parts do not fall out and possibly block a mechanism.

Use of retaining rings

Retaining rings are used in a variety of applications. They are used to secure and connect individual components, making them ideal for utilization in mechanical engineering. Retaining rings are often used as a simple and usually cost-effective solution, for example to secure components on a shaft against axial direction. Some forms, e. g. Slat retaining rings can also be used to provide axial locking and also serve as a form of labyrinth seal.

Retaining rings for shafts (outer rings) according to DIN 471

The inner diameter of the retaining rings for shafts lies positively on the groove surface in the shaft after assembly. The assembly brackets are aligned outwards.

Retaining rings for bores (inner rings) according to DIN 472

After assembly, the outer diameter of retaining rings for bores lies positively on the groove surface in the bore. The assembly brackets are aligned inwards.

Other types of retaining rings

There are many different types of retaining rings. The most common are spring rings, rolling bearing rings, round sealing rings and screw locking rings.

  • Shaft ring
  • Spiral retaining ring
  • Snap rings
  • Spring rings are the most commonly used retaining rings. They are usually made of steel, stainless steel or brass. They are used to secure components and to prevent their unintentional loosening.
  • Rolling bearing rings are another type of retaining ring. They are usually made of plastic or metal and are available in different sizes and shapes. They are used to secure the rolling bearings in wheels and other mechanical assembly parts.
  • Round sealing rings are another type of retaining rings. They are usually made of rubber or plastic, and are used as a mechanical seal between two components.
  • Screw locking rings are also a common type of retaining rings. They are usually made of steel or plastic and are used to secure and connect screws.