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Lee Spring custom designs aid bounce-back of manufacturing industry in UK

From engines to trim, toys to medical devices and instrumentation to valves, the Lee Spring capability to quickly create application specific springs and spring components is aiding the regrowth of UK manufacturing industry.

Although Lee Spring carry over 23,000 catalogued items, it is just as common to find that a variant or complete custom item is required to suit a new design or new assembly process. A special spring design may add quality to product operation or its longevity, often with significant savings in component cost and/or assembly time.

Lee Spring technical and cultural capability, derived from experience since 1918 working alongside customers, enables them to develop project specifications to international standards such as RoHS, REACH and DFARS. They can hand-hold customers through the specification prototyping, development/trials process to final sign-off and mainline production. This includes full CAD modelling on to prototyping and supply chain management for commercial, industrial, aerospace and military sectors. Custom springs may be stocked in depth to meet customers' demand schedule so enabling efficient and timely delivery wherever required worldwide.

Typical custom variants of standard springs include varying finishes, alternative materials for enhanced performance, polishing or coating, non-standard loadings, non-standard sizes, matching to suit exceptional environments, demands for extreme longevity or specific concerns regarding materials matching etc. A common request is to meet tighter tolerances required for specialist housing designs. This custom process encompasses special standards requirements, non-standard finishes - for aesthetic or functional reasons, such as colour matching or colour coding, special shapes, special end forming, retaining clips - wire forms and stampings/other formed metal parts (fourslide parts), trim clips etc.

Specification of custom springs or components can involve production in materials such as beryllium copper, brass, hard drawn carbon steel, oil tempered carbon steel, oil tempered chrome silicon, oil tempered chrome vanadium, Elgiloy®, Hastelloy®, Inconel®, Monel®, music wire, phosphor bronze, plastic composites, 300 series stainless steel, 17-7 stainless steel.

A vital part of custom design of course is the selection of secondary operations such as assembly, colour coding, electro-polishing, grinding, heat treating, looping, passivation, powder coating, shot peening, spring setting, plating e.g. with nickel or zinc and use of other special finishes e.g. black oxide.

For further information on Lee Spring products, view website:

Lee Spring offer a big expansion of standard Die Spring range

As major suppliers of ex-stock die springs Lee Spring are keen to expand their standard ranges - in this case their Die Spring catalogue has been greatly extended with 71 new items. These new items in music wire or OTCS (chrome silicon steel) reduce the gap between different standard lengths with additional options over 6 inch lengths, so making it easier to choose a suitable standard spring. New lengths include 4, 5, 6, 7, 7.5 and 8 inch with 8 different outer diameters to suit medium (grey), medium-heavy (purple), heavy (black) and extra heavy duty (orange) loadings.

Similarly to other Lee Spring die springs the new sizes are generally priced at 1/3 to 1/2 less than the cost of comparable rectangular wire springs, offering users a distinct value advantage. In independent testing conducted by the Institute of Spring Technology, Lee Spring's die springs demonstrated a life-expectancy equal to traditional rectangular wire die springs.

Ex-stock die springs are not solely used in dies but find application in clutches, brakes, farm machinery and aircraft mechanisms. They are ideal for use as die springs or as heavy duty compression springs for any high stress, heavy load application.

Lee Spring standard die springs are shot-peened for extended life and pre-set to prevent loss of length in service. Importantly they are supplied with closed and ground ends to provide square seating with a large bearing surface - they are suitable for orientation either way up and for use in heavy duty applications. They are powder coated for corrosion protection. Custom variants are also available.

For further information on Lee Spring products, view website: or follow them on twitter:

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