Rubber cords
Material specification
Principal factors for the material selection are pressure, temperature, and packed medium.
| Material | Temperature range | Usage | Hardness |
|---|---|---|---|
|
NBR |
- 30 °C + 110 °C |
standart material for hydraulic and pneumatic compression fluid on mineral-oil base animal and vegetable oils heavily inflame fluids, aliphatic hydrocarbons (propane,butane,gas) silicon oils water up to +80°C, air, bio-oils, from synthetic ester and vegetable oils |
70 |
|
EPDM |
- 60 °C + 150 °C |
hot water, vapour, brake fluid, washing means alcohols, ketones, KFZ-cold water heavily inflame fluids on the phosphorus-acid base organic and anorganic acids and bases |
70 |
|
Silicone |
- 70 °C + 230 ° |
hot air, oxygen, ozone, UV-rays aliphatic engine and transmission oils, animal and vegetable oils brake fluids |
60 |
|
FPM |
- 20 °C + 260 °C |
mineral oils aliphatic, aromatic and chlorine hydrocarbons gas, super-gas, diesel-propellants heavily inflame fluids on phosphate-ester base, silicon oils acids, lyes |
70 |
Standard types:
NBR 70 and FPM 70 materials
Size toleration
| NBR material | |
|---|---|
| cord diameter in mm | toleration in mm |
| 1,5 - 2,0 | ± 0,2 |
| 2,1 - 3,0 | ± 0,25 |
| 3,1 - 4,0 | ± 0,35 |
| 4,1 - 6,0 | ± 0,4 |
| 6,1 - 10,0 | ± 0,55 |
| 10,1 - 16,0 | ± 0,65 |
| 16,1 - 24,0 | ± 0,85 |
| 24,1 - 30,0 | ± 1,00 |
| FPM material | |
|---|---|
| cord diameter in mm | toleration in mm |
| 1,5 - 2,5 | ± 0,2 |
| 2,6 - 3,0 | ± 0,25 |
| 3,1 - 6,0 | ± 0,3 |
| 6,1 - 10,0 | ± 0,4 |
| 10,1 - 16,0 | ± 0,5 |
| 16,1 - 25,0 | ± 0,7 |
| 25,1 - 30,0 | ± 0,9 |