Springs - Import export

Compression springs is the most common type of springs. The majority of compression springs are cylindrical and linear, but to this group belongs also conical, barrel shaped, tapered out ends and more. The design can be adjusted to fulfill a wide range of requirements concerning spring characteristic.

Lesjöfors’ range of standard springs consists of over 10,000 different items. Our highly efficient store of standard springs guarantees high delivery reliability. All our standard springs have been posted as 3D CAD models, and are available for downloading.

Westfälische Drahtindustrie manufactures steel wire for springs for use in a wide range of applications automotive, mechanical engineering, window and door equipment, agricultural technology, furniture industry, screen wire for the filter industry, various industrial products.

Dimensions Spring dimensioning according to customer request Material All spring materials Stainless steel Coating In-house phosphating Color code on the spring Additional coatings through external services Specialities Wave springs highly resistant against dynamic stress Wave springs highly resistant against static stress Minimal relaxation through heat treatment Automated setting- and force-inspection Customized dimensioning Axial installation space saving up to 50 % High spring rates with low tolerances

Dimensions Wire diameter: 0,2 – 8,0 mm Outside diameter: > 120 mm after consultation All wire profiles feasible Material All spring materials and quality steels with lower strengths Coating All commonly coated spring steels In-house phosphating In-house stove-enameling Additional coatings through external services Specialities Clamping rings made of round wire or flat material Clamping rings with a stamp Rings with defined bendings Minimum burr cut-geometry Additional processing available after consultation Customer specific packaging Rapid prototyping

Dimensions Wire diameter: 0,3 – 4,5 mm spring-hardened Wire diameter: 0,3 – 7,0 mm soft Profiles other than round wire after consultation Material All spring materials and quality steels with lower strengths Coating All commonly coated spring steels Additional coatings available after consultation Specialities Tight torsional tolerances Torsion springs with max. two coils (toggle springs) All kind of hook and leg configuration Rapid prototyping

Dimensions Wire diameter: 0,2 – 8,0 mm Spring length up to 1500 mm Special profiles feasible Outside diameter max. 120 mm Customer specific spring shape Material All spring materials Coating All commonly coated spring steels In-house phosphating In-house stove-enameling Additional coatings through external services Specialities Compression springs highly resistant against dynamic stress Compression springs highly resistant against static stress Minimal relaxation due to heat treatment Fully automated setting- and force-inspection Smallest force tolerances Customer specific packaging Assembling and mounting with other components Rapid prototyping

Dimensions Wire diameter: from 0,2 mm Spring geometry after consultation Material Stainless steel Copper alloy Customized solutions Coating Additional coatings through external services (e. g. gold-plated, silver-plated, tin-plated) Specialities Highest precision because of laser-welded spring ends Optimal contact properties because of inclined coils Automated manufacturing Customer specific packaging Rapid prototyping

Modern manufacturing faclilities using the latest in design and production technology ensure consistent, high quality, long life products that are competitive priced.

Multi-coil wave springs are made from flat-rolled spring wire that is coiled to a helical shape and the coils are at the same time given a sinus shaped wave form. The force-deflection relation is created by flattening out the wave form when the spring is compressed. The function is hence like a helically shaped leaf spring.

Many applications require two similar springs, but with one right-hand coiled and one left-hand coiled. In some cases, these two springs can be combined into a double spring, which has one right and one left-hand coiled spring body connected to each other.

Torsion bar springs is a good alternative to clock springs or helical torsion springs, when a rotational torque is needed in applications where the spring shall fit into a space that is limited radially, but with lots of space axially.

Most common ends are different types of end loops and hooks, there are also a wide range of other mechanical attachment possibilities such as coiled in and screwed in attachments. Examples are, half hooks, German loops, English loops, extended hooks, side hooks, side loops, screw plugs and screw shackles.

The number of turns is individually determined and can be as much as 50. Different coiling techniques exist to give the material the desired curvature that matches the torque-rotation requirements. The spring has many similarities with clock springs, but have a much larger operating range in terms of number of turns.

Disc springs (also called Belleville springs) are geometrically a cylindrical washer with a slightly conical shape. It is used as compression spring and is the best solution when forces are high and travel relatively limited. This type of springs can or in parallel, which increases travel and/or force.

Constant Force Springs are manufactured from flat strip material and spooled to a specific curvature matching the needed pull force. There is practically no limit on extension speed and acceleration. The springs can be fitted in a number of ways and extended partly or completely.

Clock Springs – also called hair springs – is a torsion spring that is optimum for installation spaces that are limited axially, but with more space radially. They are made from strip material or flat rolled wire that is wound in a flat, spiral shape.

Dynamically dampened gas springs are commonly used in applications that do not allow the piston rod to be facing downward in the open position, while maintaining the ability for soft and controlled damping.

Lockable gas springs are commonly used in applications requiring the ability to lock out the stroke in a desired position without the need for external locking mechanisms. This is achieved by a unique piston design that separates the gas and oil chambers of the spring

As part of a global design, manufacturing and technological development network which includes sites in Cornwall, UK, Lesjöfors in Sweden and Åminnefors in Finland, our manufacturing excellence and customer service is dedicated to world-leading products and services.

Spring isolators can be used for source and sender vibration isolation. The springs are manufactured of a special spring steel wire and KTL coated. Every spring isolator can be provided with an additional damping cushion of stainless-steel. Elemente with a frequency range between 3-4 Hz can be provided with a viscous damping, too. Spring isolators with a natural frequency range of 3-5 or 4-6 Hz are especially made for higher forces. They can be expanded in size and load-capacity without any difficulty. Spring isolators of RG+ are available for four different natural frequency ranges: Spring isolators with a natural frequency of 3-4 Hz Spring isolators with a natural frequency of 5-6 Hz Spring isolators with a natural frequency of 7-9 Hz Spring isolators with a natural frequency of 3-5 or 4-6 Hz

This parts used for mechanical parts.

Polysorb Disk springs delivery program De [mm]: Di [mm]: disc springs are annulus discs stressable in the axial direction, which are turned over in the shape of a disc in the axial direction. disc springs provide a more favorable space usage than other spring types. They are particularly suitable for designs that demand a small spring deflection. + When not to use Polysorb Disk springs? For the implementation of specially flat load deflection curves that are possible with metal only with considerable complexity and expenditure (slotted versions). For compensation of axial clearance and manufacturing tolerances For vibration compensation For noise dampening When an antimagnetic material is required For electrical and thermal insulation When no corrosion problems should arise When lubrication is not necessary For low weight For low space requirement – When not to use polyserb disk springs? When constant spring forces are necessary over a wide temperature range When high spring forces are required The spring deflection of the disk spring is relatively small. Therefore a number of disk springs are combined in practice. Alternatively layered disk springs enhance the spring deflection in proportion to the number, whereby the overall spring force is as large as the force of the individual disk spring. To increase the force, the disk springs can be layered in parallel as a spring packet. Chemical resistance Polysorb disk springs are resistant to many chemicals. iglidur® A500 has a higher resistance than iglidur® J. Medium Resistance iglidur® J iglidur® A500 Alcohols + + Hydrocarbons + + Fats, oils without additives + + Fuels + + Diluted acids 0 to - + Strong acids - + Diluted bases + + Strong bases + to 0 + Humidity absorption The low humidity absorption allows them to be used in wet or humid environment. Polysorb® disk springs absorb humidity. Thereby their mechanical properties alter. In the worst application that can be thought of - extremely long application in water - Polysorb® disk springs still exhibit high spring force. iglidur® Standard environment saturated in water J 18 15 A500 24 23 Increased operating temperature Increased temperatures lead to the decline of stiffening in polymers. Polysorb® disk springs exhibit a maximum spring force of 8 N even at the maximum permitted temperature of 80° C. See figure for relationship of spring force to ambient temperature. Polysorb Disk springs long-term tests X = downward deflection [%] Y= spring force [N] A = JTEM-10 B = A500TEM-10 Figure 35.1: Spring force depending on the percentage of deflection measured in installation size 10 X= Ambient temperature [°C] Y= Maximum spring force [N] Figure 35.2: Influence of the ambient temperature on the spring force, measured on JTEM-10 Polysorb Disk springs delivery program De [mm]: Di [mm]: Dimensions according to DIN 2093

Valve Technology, Stainless Steel Force range max. 100 N Stroke 20 mm Protection against corrosion and superior optics for even more sophisticated requirements: Based on ACE's industrial gas push type springs GS-8 to 40 made of steel, these models combine all advantages of stainless steel: they look great and are rust free. They are filled with food-grade oil as standard, which conforms to the requirements of FDA 21 CFR 178.3570. These ACE gas push type springs do not only look good, they also are available in various stroke lengths and possible extension forces. A comprehensive range of accessories in stainless steel guarantees easy assembly and a broad range of uses.

It is possible to have square as well as round shapes, drilled holes and slots from Ø2 – Ø30 mm, with counter bores and tapped holes. To reduce stress concentration and shearing stress when mounting, we recommend the reinforcement of the clamping areas by fixing glass reinforced laminate (GHGW) plates. GHGW-reinforcement plates can be purchased loose or attached to the leaf spring. A special two-component adhesive is applied for the bonding. Following images indicate possible spring shapes:

Valve Technology Traction force range max. 1,200 N Stroke 30 mm The solution to a lack of space: If standard push type gas springs cannot be used due to a lack of space, ACES' industrial pull type gas springs come into their own. They work in the opposite way to standard push type gas springs. The piston rod is retracted when the cylinder is unloaded. The gas pressure in the cylinder draws the piston rod in. ACE pull type gas springs offer the maximum service life thanks to the solid chrome-plated piston rod and an integrated sliding bearing. The maintenance-free and ready-to-install products are available in body diameters of 15 to 40 mm as well as forces from 40 to 5,000 N and are available from stock with valve and large selection of accessories. The traction force can be subsequently adjusted using the valve.

Valve Technology, Stainless Steel Traction force range max. 1,200 N Stroke 50 mm Brilliant performance when things become tight: For specific use e.g. in tough surroundings or small spaces, the broad spectrum of ACE industrial pull type gas springs made of stainless steel with body diameters from 15 to 40 mm supplements the comprehensive programme of the ACE industrial pull type gas springs with valves. This high quality design is rust free and is more robust against environmental impact compared with standard gas pull type springs. These stainless steel gas springs are also optically appealing, very durable and available, upon request, in many stroke lengths and are also possible in many extension forces in combination with the suitable stainless steel accessories.

Valve Technology, Stainless Steel Traction force range max. 300 N Stroke 30 mm Brilliant performance when things become tight: For specific use e.g. in tough surroundings or small spaces, the broad spectrum of ACE industrial pull type gas springs made of stainless steel with body diameters from 15 to 40 mm supplements the comprehensive programme of the ACE industrial pull type gas springs with valves. This high quality design is rust free and is more robust against environmental impact compared with standard gas pull type springs. These stainless steel gas springs are also optically appealing, very durable and available, upon request, in many stroke lengths and are also possible in many extension forces in combination with the suitable stainless steel accessories.

Valve Technology, Stainless Steel Traction force range max. 150 N Stroke 20 mm Brilliant performance when things become tight: For specific use e.g. in tough surroundings or small spaces, the broad spectrum of ACE industrial pull type gas springs made of stainless steel with body diameters from 15 to 40 mm supplements the comprehensive programme of the ACE industrial pull type gas springs with valves. This high quality design is rust free and is more robust against environmental impact compared with standard gas pull type springs. These stainless steel gas springs are also optically appealing, very durable and available, upon request, in many stroke lengths and are also possible in many extension forces in combination with the suitable stainless steel accessories.