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DIN and standard parts

Washers with locking function

Lock washers effectively prevent the screw connection from working loose.

Lock washers – B5365

Effective anti-rotation locks

The washers effectively prevent the screw from working loose

The ribs on the upper and/or lower side of the washer dig into the screw and the clamping part and efficiently prevent the screw from working loose. Curved washers are highly flexible and reduce the loss of pre-tensioning force from settling phenomena.

Method and principle

Overview of washers with locking function

Working principle

Depending on the requirements and design, washers with a locking function can be used to lock/set screw connections and preventing loosening or loss of the connection.

Material

They are available in the hardest steel grades, as well as in stainless steel. Soft materials such as brass or aluminium are unsuitable for washers with a locking function.

Surfaces

Our products can be coated with different surface finishes, depending on requirements and application. We will be pleased to give you individual advice on the right coating system.

We offer the following surfaces as standard:

  • Plain
  • Zinc plated (industry standard)
  • VZD (zinc plated with thick layer passivation)
  • ISO Standard Galvanized
  • Zinc-nickel
  • Zinc flake

Working principle of the locking functions

Screw connections must be properly secured for the intended use. The correct mechanism must be selected to ensure the functioning of machines and components. A distinction is made between three groups:

Screw connections must be properly secured for the intended use. The correct mechanism must be selected to ensure the functioning of machines and components. A distinction is made between three groups:

  • Setting locks

    These use elastic components to compensate for relaxation and creep phenomena. As a result, a portion of the pre-tensioning force can be retained and the connection holds fast.

  • Locking devices

    These increase the friction on the screw bolt using chemical or mechanical clamping mechanisms. The increased torque prevents full loosening of the connection. At the same time, loss of pre-tensioning force can be kept to a minimum.

  • Anti-rotation locks

    By causing the partner threads to lock mechanically or adhere to one another, these are able to maintain at least 80% of the previously applied pre-tensioning force, even when subject to high dynamic loads. This is essential to keep a component in operation in safety-relevant applications.

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Types of washers with locking function

Information and more

Downloads

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