Elastomer compression springs are standardized in DIN ISO 10069-1. Our qualities EFFBE 295 and EFFBE Urelast exceed these standards in many cases.
For the production of EFFBE spring elements, three different elastomer types are offered, in accordance with the application criteria:
The Essential Material Properties:
Unit |
EFFBE 295 Chloroprene rubber CR 70 / DIN ISO 10069-1 |
EFFBE Urelast Polyurethane rubber UN80 |
EFFBE Urelast Polyurethane rubber | |
---|---|---|---|---|
Colour | Black | Natural | Red | |
Hardness in accordance with DIN ISO7619 | Shore A | 70 | 80 | 92 |
Tensile Strength in accordance with DIN 53 504 | N / mm2 | ≥12 | ≤50 | ≤40 |
Elongation at break in accordance with DIN 53 504 | % | ≥250 | ≥640 | ≥550 |
Tear propagation resistance in acc. with DIN ISO 34-1 | N / mm | 4 | ≤50 | ≤50 |
Rebound resilience in accordance with DIN 53 512 | % | 30 | 48 | 43 |
Abrasion in accordance with DIN ISO 4649 | mm3 | ≤150 | ≥40 | ≤40 |
Compression set in accordance with DIN ISO 815-1 | % | ≤20 | ≤30 | ≤30 |
Bulk density in accordance with DIN EN ISO 1183 | g / cm3 | 1,37 | 1,24 | 1,27 |
Temperature application area | °C |
-20°C to + 80°C Briefly from -40°C TO + 120°C |
-20°C to + 80°C
Briefly from -40°C TO + 120°C |
-20°C to + 80°C
Briefly from -40°C TO + 120°C |
Resistant to | ||||
Oil (Lubricating oil) | Adequate | Good | Good | |
Grease | Adequate | Good | Good | |
Alcohol | Good | Good | Good | |
Brenzene | Adequate | Good | Good | |
Water | Good | Adequate -1) | Adequate -1) | |
Humidity | Good | Adequate -1) | Adequate -1) | |
Ozone | Good | Good | Adequate | |
Alkaline Solutions | Adequate | Adequate | Adequate | |
Acids | Adequate/Condtionally |
Adequate |
Adequate |
use must be checked relative to duration, temperature and/or concentration.
* Shore hardness measured on the test sheet in accordance with DIN ISO 7619.
1) Hydrolysis-resistant material on request.
Service Life
If the design criteria are complied with more than 2x106 load changes are possible.
Other Advantages:
Temperature Resistance
The operating temperature range is between -20oC and +80oC;
Short-term temperatures -40oC and +120oC are possible. The determining factors are self-warming and ambient temperature.
Diagram 2 shows the elastic behavior depending on temperature. The spring characteristic is determined by the temperature-dependant modules of elasticity, by the geometric shape and the type and size of deformation