JB Springs / John Binns & Son (Springs) Ltd. Spring design and spring manufacturing based in North Yorkshire.

Tension springs are also known as extension springs. As the spring is extended from its free length it applies a resistive force. This increases at a linear rate but, unlike compression springs, closed coiled tension springs have the additional force from their initial tension. This initial tension is effectively the force required to begin to open up the spring’s coils.

Tension springs have a wide range of uses and are found in many mechanical applications; examples being their use in switches, levers and braking systems.

John Binns & Son has a great deal of experience and expertise in the design and manufacture of tension springs and always welcomes the opportunity to help customers obtain the best possible solution for their product.

The following parameters are important in establishing the correct design of tension spring:

• The size of any hole the spring works in

• The loads/forces required and the lengths at which they are required

• The maximum working deflection requiredt

• The frequency of operation

• The operating environment. This will determine the choice of material and/or the choice of any

finish for corrosion protection.

• How and where the spring is to be fitted. This will determine type of loops or ends required.

There are many different forms of tension spring end.

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