System springs
System springs, they have rectangle cross sections. Produced according to ISO 10243 which defines its diameter, length and strength. This standard defines four series of springs, which when of same size they are interchangeable offering different forces. These four series are each one colour for an easy identification of the type of spring.
Inside the family of rectangle cross section springs there is a fifth serie which is superstrong, which with equivalent sizes to the other four series it offers a force up to four times the one of their strongest serie.
Also there is another type of system spring which follows the same rules as the previous, but this type has an oval cross section which keeping the same sizes it offers alternative forces and strokes.
System springs with rectangle cross sectionAll springs are made of steel alloy wires (Cr-V/Cr-Si). This wire is especially resistant to impacts and deformations. Thanks to its quality it can work in high temperature conditions, up to 230ºC. The springs are treated thermally and put through a "shot peened" process aswell as preloaded. All that removes tensions and achieves high fatigue limits. |
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There are five series of System Springs as the table shows:
| SERIE | LOAD | LONG LIFE DEFLECTION | MAX. RECOMMENDED DEFLECTION |
| SZ-8010 | LIGHT | 30% | 40% |
| SZ-8020 | MEDIUM | 25% | 37,5% |
| SZ-8030 | HEAVY | 20% | 30% |
| SZ-8040 | EXTRAHEAVY | 17% | 25% |
| SZ-8045 | SUPERHEAVY | 10% | 15% |
| SZ-8047 | DOUBLE EXTRA HEAVY | CONSULT | CONSULT |
| SZ-8049 | DOUBLE EXTRA EXTRA HEAVY | CONSULT | CONSULT |
Usage recommendations:
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Select the longest possible spring with the lowest possible force, resulting in a smaller ammount of work.
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Preload the spring; at least a 5% of its length with a 2 mm minimum.
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Prevent total deflection from being greater from the maximum recommended.
Table of Comparisons of Hardness within models
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Tables standard measures |
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| Helical Springs SZ-8010 | Helical Springs SZ-8020 | Helical Springs SZ-8030 | |
| Helical Springs SZ-8040 | Helical Springs SZ-8045 | Helical Springs SZ-8047 | Helical Springs SZ-8049 |
Oval cross section System Springs
Oval cross section system springs can be split into four series identified by their colour.
| SERIE | LOAD | LONG LIFE DEFLECTION | MAX. RECOMMENDED DEFLECTION |
| L1S | LIGHT | 25% | 50% |
| L2S | MEDIUM | 20% | 37% |
| L3S | HEAVY | 15% | 30% |
| L4S | EXTRAHEAVY | 15% | 25% |
Helical oval cross section springs have greater tensions than the ones with round cross sections. Life span of this springs is slightly shorter due to a worse tension distribution along the spring.