"0" Defects

Muelles CROM can guarantee "0" defects thanks to modern and sophisticated detection systems, regulation and selection of parts. Our machinery and production lines are equipped with the latest technological advances

AID Design

We can design any type of spring and/or part of which we manufacture with 100% success guarantee We like our customers and even our potential.

Engineering

Muelles CROM Springs is a pioneer in the design and calculation of springs. No wonder we are the leading manufacturers of springs in the country to have an Internet presence.

Fishing hook

Description of the hook

Muelles Crom. Spring manufacturers leaders in design, quality and service since 1953

MUELLES CROM was founded in 1953 in Granollers. We currently have production facilities in Granollers and Les Franqueses del Vallès.

We are a family business focused on manufacturing all kinds of compression springs, tension and torsion, specializing in springs with high technical content and for this reason the facilities of production that we make available to our employees are technologically very high.

The sectors we serve include automotive, aerospace, motorcycle, military, electrical, electronics, nuclear, textile, etc ...

We currently export to the world, USA, Canada, Germany, Mexico, UK, Poland, Czech Republic, Brazil, Italy, Monaco, France, Belgium, India, Portugal, Morocco, Tunis, Venezuela, Colombia & Malaysia.

We are as well, distributors of the brands TOHATSU SPRINGS from Tokyo (Japan) and LESJOFORS AB from Stockolm (Sweden)

Technical considerations monographic on tension springs

Extension springs initial tension

One of the least understood elements of spring design is the initial tension in the tension springs . Often engineers designing springs only calculate the amount of charge needed to overcome this force at once , and often not even take into account either the calculated finger. Although two springs may be identical in geometry , can vary their A very technical description of the initial tension of the spring is wound up against its own axis...

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Initial tension test

Measuring the amount of initial strain in an extension spring can be a complicated and often poorly understood for those who are not familiar with the manufacture of springs. Sometimes drivers extend the docks until you can "see the light through.

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Extension samples 01

Extension hook, larged hook Traction spring with elongated hooks normally used in trestle spring, windshield wipers, cofent springs or even for exhaust pipes.

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Extension samples 02

SpringRock is a system of assembly & manufacturing of springs patented by Muelles CROM that allows the change of hooks in the springs of traction is automatic and guaranteed for life for our customers.
Shapes

This type of pieces usually require investment of tools and large quantities are required. For smaller quantities they are manufactured in CNC without investment of tools.

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