Springs - Compression

So why machined Compression or Extension springs.?

Machined springs can provide very precise, linear deflection rates because virtually all-residual stresses are eliminated. As a result, there are no internal stresses to overcome before deflection occurs, which can be the case in the wire wound spring.

We like to think of it as.....Precision Elasticity...

Uniquely we can offer multiple start spring coil configurations. The most common configuration is the single start spring, which consists of a single continuous coil element, which starts at one end and terminates at the other end, much like its wire wound counterpart. In all multi start compression or extension springs they have intertwined continuous coil elements, still within the same single part construction. In effect, this puts multiple independent helix's in the same cylindrical plane, which provides totally enhanced spring performance.With the machined spring, perpendicularity, parallelism, lateral bending, axial and torsional rates can be guaranteed.

Normal rate accuracy is +/-10% but rates <1% are usually possible !

Multi-start springs have many advantages. When applied to compression and extension springs, a single start spring provides a reaction force plus a moment. On multiple start flexures, all internal moments are resolved within the spring itself, which translates into excellent compression or extension parallelism. Multiple start spring configurations also significantly unify the lateral bending and lateral translation forces and moments around the springs circumference given a lateral deflection.

Double and triple start variants make the loading points irrelevant on the radius of the spring but increase the accuracy of parallelism. Multiple starts as high as five have been employed to unify the lateral reaction forces of machined springs.

Another advantage of multiple start spring elements is that they not only provide redundant elastic elements should a failure occur, but a failed element (coil) will be physically trapped by the remaining one and in many cases will allow the albeit reduced function of the spring design to still operate.

• Single start machined springs are always available
• Double start machined springs provide uniform end reactions
• Triple start machined springs and beyond enhance the reaction uniformity.

Once the performance aspects of the spring are calculated and agreed, we can then look at the method of attachment. In many cases the machined spring incorporates other parts of the working mechanism into the single part, such as flanges, gears, splines etc, making the final item more reliable. The choice of end attachment is really up to your imagination. !

Amalgamation of parts reduces the tolerances on the overall part ...

The advantages of the machined spring product are numerous having proven itself in medical, aerospace, semiconductor and motor-sport industries to name a few. Wherever a wound spring is not able to meet your performance criteria or a new spring design requires ultimate accuracy and repeatability, the machined spring is the ideal partner. The next time you require a spring in a critical or high duty cycle environment, the machined spring from Abssac Limited may be the answer to your design problems.

The product is machined to meet exact customer size and performance requirement...

If you require further technical information, please do not hesitate to contact our sales engineers who will be more than happy to help you with your selection. Alternatively download the relevant catalogue from the download button on this page or use the following link to request a printed catalogue or a CD version. CD/Catalogue