HOW TO MAKE A COIL SPRING

Step 1

Relevant details are entered into our in-house developed spring designing computer program that gives required production specifications and produces a process sheet that will accompany the springs until their completion.

Step 2

The required diameter spring steel bar is cut to the correct length. For automotive springs the steel used is a B.H.P. developed miro-alloyed spring steel grade X4K92M61S, other applications are dependant on the size of the material used and the springs designed use.

Step 3

The spring end treatment is then applied if applicable. This usually involves tapering one or both ends of the spring. This is done as a hot process either under eccentric rollers or on heavier material under a mechanical hammer.

Step 4

All hot wound coil springs are coiled on our own designed and built coil winders. Once wound the spring is checked for correct set and then quenched in oil to produce a hardened spring.

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