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Rubber buffers
norelem rubber buffers are popular construction and standard elements for elastic bearings. These rubber buffers are distinguished by their robustness and their effective damping and cushioning of shocks. This is particularly important when there are repeated impacts and accelerations with an end stop. norelem rubber buffers assist in damping and cushioning machine vibrations.

Range of applications

Rubber buffers are used for pressure loads and shear loads in the widest variety of applications in industry and trade, mainly for absorbing kinetic energy, and they belong to the buffer element product family. However, norelem rubber buffers can support significantly less shear load than pressure load. You can find the load data at the technical information page on rubber buffers.

They are also used, among other things, in the bearings for assemblies, motors, compressors, pumps and testing machines. Rubber buffers are frequently used as door stops or as noise reduction elements.

Rubber buffer types

In the norelem online shop, rubber buffers are offered in different hardness grades. Natural rubber in combination with steel or stainless steel ensures durability and reliable damping.
For different mounting requirements, norelem offers rubber buffers with internal thread or external thread. Depending on their construction, rubber buffers absorb energy according to shape.
A waisted rubber contour ensures optimal damping, for example where there are radial loads with large radial deflection. On the other hand, tapered buffers are especially good for absorbing strong shock loads. The type of application depends on their design. Rubber buffers find variable applications throughout the machine environment.

Rubber buffer types

The rubber buffer type indicates the type of application the buffer can be used in when integrated in industry or machine construction.

Type A: The norelem rubber buffers in the Type A product group have an external thread on both sides.

Type B: The Type B rubber buffer can be fitted and/or integrated with an internal thread and an opposing external thread.

Type C: The Type C product group of rubber buffers have an internal thread at both ends.

Type D: The rubber buffer in the Type D product group has an external thread and a natural rubber overlay on the visible surface as an end stop to limit the spring deflection for moving bodies.

Type E: The Type E rubber buffer differs from the Type D buffer in its thread. The norelem Type E rubber buffer has an internal thread.

Rubber buffers with stainless steel

The norelem rubber buffers with stainless steel have a grey elastomer overlay made of natural rubber with a Shore A hardness grade of 55°. The bright, rustproof stainless steel rubber buffer versions can be used in a temperature range from -30 °C to +80 °C. There are various versions of the stainless steel rubber buffer in the norelem online shop, Type B, Type C, Type E and Type D (with external thread for use as an end stop or for machines which are not anchored to a foundation).

Rubber buffer with steel or stainless steel

The rubber buffers with black elastomer natural rubber overlay and steel or stainless steel have a Shore A medium hardness grade of 55°. Rubber buffers in the steel version (strength 5.6) are galvanized, rubber buffers in the stainless steel version are bright.
In the norelem shop, rubber buffers are available with external thread (Type A), external thread (Type B), internal thread (Type C) or with external thread (Type D, with external thread for use as an end stop or on machines which are not anchored to a foundation).
The bright, rustproof stainless steel rubber buffer versions can be used in a temperature range from -30 °C to +80 °C.

Waisted rubber buffers

Rubber buffers with waisted rubber contour reduce high edge loads on the rubber when there is radial deflection, thus increasing the lifetime of the component. norelem rubber buffers in the waisted version are available as Type CT (internal thread) or with two external threads (Type AT).

Parabolic rubber buffers

Parabolic rubber buffers have an external thread and a tapered elastomer overlay made of natural rubber. These buffers are always used where effective cushioning or damping of impacts is required.

Conical rubber buffers

The conical rubber buffer differs from the parabolic rubber buffer in its shape. It is not tapered, but it has the same impact damping properties.

Spherical rubber buffers

The norelem spherical rubber buffer has an internal thread and, like the conical and parabolic rubber buffers, is used for cushioning and damping impacts.

Suction foot rubber buffers

The Type DS suction foot rubber buffer has an external thread and finds applications in the bearings for assemblies, and as an end stop to limit the spring deflection for moving bodies.

Rubber stop buffers (door buffers)

The Type TP rubber stop buffer (door buffer) has a hole at the centre, which is used simply to screw it on. Rubber stop buffers can also be used as the feet under machines.

Rubber buffer accessories

Rubber stop rail

To absorb large impacts and to act as a bearing for large bodies, norelem offers a full range of rubber stop rails. These are used to absorb large impact forces, and as a bearing for large bodies. These rubber stop rails are supplied with steel which is painted black or galvanised.

O-shaped mount

Another accessory from the norelem rubber buffer product group is the O-shaped mount with galvanised steel. O-shaped mounts have a very soft cushioning characteristic, and for this reason they are also called low frequency mounts. They are used for the low-frequency mounting of instruments and electrical components, and for mounting light assemblies and precision mechanical devices.

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