Flat Wire Helper Springs
Premium 70-Series (Various IDs)
These 70-Series flat wire springs utilize a rectangular wire cross-section to achieve a lower solid block height compared to standard round wire springs. This design maximises usable stroke and is ideal for tender/helper applications where space is at a premium. Please check the Di column carefully as this series contains mixed Inner Diameters.
Lo Open Length (mm)
R Spring Rate (N/mm)
Di Inside Diameter (mm)
Sn Block Length (mm)
Fn Force at Block (N)
St Usable Stroke (mm)
| Part Number | Lo | R | Di | Sn | Fn | St |
|---|---|---|---|---|---|---|
| AST-70-40-61 | 70 | 40 | 61 | 40 | 1200 | 30 |
| AST-70-40-75 | 70 | 40 | 75 | 27 | 1730 | 43 |
| AST-70-50-61 | 70 | 50 | 61 | 28 | 2100 | 42 |
| AST-70-50-64 | 70 | 50 | 64 | 27 | 2150 | 43 |
| AST-70-50-75 | 70 | 50 | 75 | 23 | 2350 | 47 |
| AST-70-65-61 | 70 | 65 | 61 | 26 | 2880 | 44 |
| AST-70-65-64 | 70 | 65 | 64 | 27 | 2828 | 44 |
| AST-70-65-75 | 70 | 65 | 75 | 23 | 3055 | 47 |