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Rubber items for brake pincer

Rubber items for brake valves

Rubber items for the engine



For 45 years BARBIERI RUBBER has been manufacturing all the rubber parts in the steering system of vehicles and other means of transport and movement produced by the most prestigious European manufacturers. Over the years it has specialized in designing and moulding shock absorbers for the steering column; protection boots and bellows for transmission organs and steering axle joints.


The protection boot for the steering system protects the constant-velocity joint from dust, mud, water and small solid bodies.

The use of rubber in the protection boot is certainly a necessity to achieve the high level of quality required by the automotive sector.

Once the bellows or boot mould has been created, we can produce it (compression or injection moulding) using all the main types of rubber available on the market. The choice of material for the boot is as important as its design.

The rubber that is used must be both elastic, to keep the mechanical stress within the elastomer to a minimum, and also mechanically resistant to shocks. What is more, the rubber of the protective boot is frequently hit by splashes of fluid such as oil and gasoline, while grease or lubricant that is corrosive for certain types of rubber is used inside the steering joint. Also, it is extremely important to determine the temperature range in which the rubber component will be working, so as to avoid problems of vitrification or deterioration of the material, resulting in the loss of its fundamental elasticity.





For all these reasons, the choice of rubber is a determining factor; BARBIERI RUBBER usually studies and plans both the design and the material to be used in collaboration with the customer. 

Despite all the above factors, the combination of which reduces the average life of a rubber boot or a rubber component in general considerably compared to work without stress, it is possible to produce a boot or bellows in such a way as to ensure a very long average working life. The variables to be maximized to achieve this result are: modulus and elongation at breaking point. However, this involves costs that need to be motivated by the production of an end product of high quality.

The choice to be made is thus a compromise between cost and average life, and BARBIERI RUBBER always supports the customer in this difficult choice, offering a material analysis service and carrying out accelerated life tests in the laboratory.


BARBIERI RUBBER, in collaboration with the customer, studies, designs and produces all the rubber parts for the brake system of motor vehicles, motorcycles, agricultural machinery, heavy transport and earthmoving equipment. 



For the brake princer Barbieri has been following the major European manufacturers of brake pincers for over 40 years, from design to production of the dust boot and the piston seal.






The rubber used is certified, it is not subject to attack by the brake oil or brake fluid, and at the same time it maintains its seal and protection characteristics for a long time.



The average working life of rubber components in the brake pincer determines the working life of the pincer itself. Our products are fitted in countries with both extremely hot and extremely cold climates, and continue to operate properly for long periods of time.


BARBIERI RUBBER also designs and manufactures rubber bellows to protect brake pumps and brake valves.


The bellows or boot protects the brake pump components from dust and other aggressive external agents, prolonging their average life. The mix used combines high elasticity and high resistance to mechanical and chemical attacks, and is also perfectly resistant to brake fluid and brake oil.

In this way, protection of the brake pump is ensured for many years even in severe weather conditions, even when exposed to direct sunlight and when installed on vehicles used in geographical areas where the climate is particularly hot or cold, and even in the case of contact with the fluids used in braking systems as a result of small leaks or maintenance operations. The design of the bellows, if properly studied, means that it reduces to a small size when closed, while retaining a considerable stroke. As a result the brake pump or brake valve is less bulky.



The world of cars, motorcycles, earth moving equipment (excavators, diggers, etc...) requires a number of rubber parts for shock absorption applications in a wide range of devices: door fasteners, steering column, cable and pipe grommets, electric fan motors, ventilation hoods, radiator supports, conditioning devices and drive shafts.

The shock absorbing properties of rubber are the best that can be achieved with a single material; no other material produces a response proportional to both displacement and also speed of movement, which is typical of a conventional shock absorber comprising a spring and a piston. 



BARBIERI RUBBER has studied different shock absorber devices for electric motors and drive shafts: small rubber parts, suitably designed, have greatly increased comfort inside the car, not only in terms of noise level, but also of vibration transmitted to the person in the car by moving parts.




Rubber spring drives, apparently of little importance, but carefully designed and tested, silence the drive system and decrease mechanical stress. In the same way, bearings supports made from special materials and to special hardness levels can greatly reduce the noise produced by a ventilation system whilst increasing its reliability and durability.


Barbieri also produces many items installed in the engine, rubber manifolds, suction seals, air and fuel pipes; items that require appropriate rubber compounds due to the fact that they are in contact with aggressive substances, oil or gasoline and fuel in general, and are operating in the presence of temperatures that in some areas may even compromise the working life of the component, if special materials resistant to high temperatures are not used.




Furthermore, the rubber components near the engine must maintain good flexibility over time because vibrations cause mechanical stress in the rubber and speed up its deterioration.





The materials developed for these items have taken several years of study and testing and are still evolving and being improved.


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