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Blog - What colours do die springs have?
Die springs and their colour codes
All die springs are colour coded according to their respective standards. The colour code represents the load that can be placed on the die spring at a certain percentage of compression. Until now there are three different scales of colour codes. The colour codes of the ISO stamp springs, the colour codes of the JISS die springs and the colour codes of the American die springs.
The table below shows the colour code of the die spring.
|
Type of load |
Oval wire / American die springs |
ISO 10243 die springs |
Die springs round wire |
JIS B5012 die springs |
|---|---|---|---|---|
|
|
Spring travel at 1,000 compressions |
Spring travel at 1.5 million compressions |
Spring travel at 1.5 million compressions |
Spring travel at 1 million compressions |
|
Ultralight load |
None |
40%1 |
None |
40% |
|
Light load |
25 – 30% |
30% |
30% |
32% |
|
20 – 25% |
30% |
30% |
25,6% |
|
|
15 – 20% |
25% |
25% |
19,2% |
|
|
15% |
20% |
None |
16% |
|
|
None |
12% |
None |
None |
|
|
Hyper heavy load |
None |
White |
None |
*50% |
* Only available with 0.5 million compressions.
1 Specially designed for injection moulding
How do I select the right die spring?
It is quite confusing that each standard has a different colour coding from the other standards. To avoid this confusion, TEVEMA only uses the die spring loads. In addition, we measure the American die springs at 1,000 compressions per hour, while the spring travel of the ISO 10243 die springs is shown per 1.5 million compressions. The JIS B5012 B die springs are calculated on a spring travel at one million compressions, the percentages are recorded to the decimal point in the JIS B5012. Furthermore, ISO 10243 die springs are the only die springs that can handle an ultra and hyper heavy load at 1.5 million compressions.
Difference in Die springs
All the die sets of ISO, JIS and US springs are manufactured for the optimal lifetime. The JIS die springs are made from trapezoid wire crossing. The ISO-die springs are made from rectangular wire. Both ensure an long service life and high spring performance for high loads. The high quality round wire die springs are made with carefull engineering for these springs, it is recommended to apply a minimum pre-load of 5% of the free length to ensure longer service life and higer spring preformance.
All these die springs are available at TEVEMA. If you don't know which die spring is suitable for you, you can read how the die springs are calculated in our post.
