Additional product ranges

Rubber-metal buffer

Efficient vibration decoupling

Effective reduction of noise and vibrations

Rubber-metal buffers protect people and machinery against harmful vibration emissions while also reducing wear.

Any machine generates vibrations and shocks during operation.
These vibrations are transmitted to the floor and foundations, producing cracks in the building. People working in the vicinity of the machines are also affected by the vibrations and often complain of joint and back pain. In addition, the noise level from machines that have not been decoupled is significantly higher, so employees have to wear ear defenders.

The risks are also recognised by legislators, who have enacted noise and vibration abatement laws. In this context, rubber-metal buffers from Böllhoff offer a particularly effective solution.

Böllhoff parabola

Method / principle

Rubber-metal buffers are mounted on the machine by means of the attached threaded element (bolt or nut thread). The damping effect is immediate, decoupling machine vibrations.

Applications

Rubber-metal buffers are widely used wherever there is a need to reduce vibrations or sudden loads. Typical areas of use include automotive construction or the decoupling of equipment units or pumps.

Product benefits
  • Isolates machines and components
  • Reduces sudden acceleration
  • Absorbs shocks
  • Maintenance‑free
  • Special parts available on request

Product benefits

There are many good reasons for using our products.

Strength and options.
Point by point.

Effective vibration reduction

The variation in material and geometry of the spring body allows for appropriate vibration decoupling for a given application.

Long service life

High quality standards and a sophisticated (optimised) processing chain significantly prolong the life of rubber-metal buffers. The products can also withstand high pull‑out forces, so even extreme stresses do not lead to immediate failure.

Robust and maintenance‑free

Unlike other damping elements used in mechanical engineering, rubber-metal buffers are resistant to many environmental influences and are maintenance‑free thanks to the encapsulated spring body.

Cost‑effective

Thanks to well‑established manufacturing processes and the use of standardised elements, rubber-metal buffers are very cost‑effective as compared with expensive shock‑absorber components.

Detailed description

 

Construction of our rubber-metal buffers

Böllhoff's rubber-metal buffers use an elastomer core as the spring and damping element to reduce vibrations. In the standard version this is made from natural rubber in three hardness variants. To ensure optimum hold and high pull‑out strengths, an optimised binder is applied to the metal components to hold the components together securely during the vulcanisation process. This durable binder system produces a secure material bond, which means that it is not absolutely necessary to enclose the metal components.

Construction of our rubber/metal buffers

Construction of our rubber-metal buffers

1) Metal component 2) Binder system 3) Elastomer (spring body)

 

Load direction

Elastic bearings in one spring axis are often not sufficient to compensate fully for machine vibrations. Complex machine sequences and movements lead to a spectrum of movements with differing spring constants. Böllhoff's rubber-metal buffers are capable of offsetting simultaneously acting forces, thereby offering comprehensive protection against vibration.

Rubber/metal buffers – load direction

The right option for every application

 

For vibration decoupling there are two basic options, both of which are widely used in industry.


Active decoupling

With active decoupling, vibrations generated by a machine are reduced. This in turn reduces the vibrations introduced into the environment.
Example: Machine feet for injection moulding machines

Rubber/metal buffers – active decoupling

Active decoupling

 

Passive decoupling

Passive decoupling ensures that machines and equipment are not disrupted by environmental vibrations which may lead to malfunctions or damage.
Example: Bearing assemblies for measuring instruments

Rubber/metal buffers – passive decoupling

Passive decoupling

 

Application support for special parts

As well as offering a wide selection of standard components, we are also happy to work with you to develop customised solutions. There are various material combinations and colour options available – please contact us for details.

Screw-in rubber/metal buffer – special geometry

Product variants

Every project deserves a tailor-made solution.

Learn more about the product types and find the right variant for your particular application.

Type A

Rubber-metal buffer with stud bolt, both sides.
Wide variety of uses, e.g. for mounting equipment units or engines. Pressure and shear loads can be offset, as can inclined loads.

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Type B

Rubber-metal buffer with stud bolt on one side and internal thread on the other.
Wide variety of uses, e.g. for mounting equipment units or engines. Pressure and shear loads can be offset, as can inclined loads.

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Type C

Rubber-metal buffer with internal thread, both sides.
Wide variety of uses, e.g. for mounting equipment units or engines. Pressure and shear loads can be offset, as can inclined loads.

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Type D

Rubber-metal buffer with stud bolt on one side and planar contact surface, one side.
Particularly suitable for installing equipment units or measuring instruments – wide variety of uses, e.g. for limiting end stops or for mounting equipment units.

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Type DS

Rubber-metal buffer with suction foot and external thread, one side.
Particularly suitable for installing equipment units or measuring instruments – wide variety of uses, e.g. for mounting equipment units without a reinforced base.

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Type E

Rubber-metal buffer with internal thread and planar contact surface, one side.
Particularly suitable for installing equipment units or measuring instruments – wide variety of uses, e.g. for mounting equipment units without a reinforced base.

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Type ES

Rubber-metal buffer with suction foot and internal thread, one side.
Particularly suitable for installing equipment units or measuring instruments – wide variety of uses, e.g. for mounting equipment units without a reinforced base.

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Type P

Parabolic rubber-metal buffer with external thread, one side.
Good properties for damping end positions or as a limit stop – highly versatile.

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Type TA

Tapered rubber-metal buffer with external thread, both sides.
Especially suitable for high compressive forces – highly versatile.

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Type TB

Tapered rubber-metal buffer with external thread on one side and internal thread on the other.
Especially suitable for high compressive forces – highly versatile.

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Type TC

Tapered rubber-metal buffer with internal thread, both sides.
Especially suitable for high compressive forces – highly versatile.

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Type K

Conical rubber-metal buffer with external thread, one side.
Especially suitable for damping end positions and for absorbing sudden loads.

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Type KE

Conical rubber-metal buffer with internal thread, one side.
Especially suitable for damping end positions and for absorbing sudden loads.

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Type KV

Conical-square rubber-metal buffer with external thread, one side.
Especially suitable for damping end positions and for absorbing sudden loads.

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Type KRA

Rubber-metal buffer with internal thread, one side.
Especially suitable for damping end positions and for absorbing sudden loads.

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More information

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