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Variable-Force Springs
Compared to constant-force springs, these are easier to pull at first but become harder to pull the farther you extend them. Use them for applications where the load becomes lighter as the spring contracts, such as in automated dispensing machines. All are stainless steel for corrosion resistance. Please allow for 1 1/2 coils on the shaft at full extension to hold the spring in place.
For technical drawings and 3-D models, click on a part number.
| Load, lbs. | Extended Lg. | Thick. | Wd. | ID | OD | Mounting Hole Dia. | Number of Mounting Holes | Material | Each | |
5,000 Cycles of Useful Life | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0.5-1.00 | 22" | 0.0045" | 0.5" | 0.4" | 0.85" | 0.191" | 1 | 301 Stainless Steel | 000000 | 00000 |
| 0.55-1.20 | 28" | 0.0045" | 0.5" | 0.4" | 0.73" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 0.75-1.50 | 22" | 0.005" | 0.5" | 0.5" | 0.8" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 0.9-1.80 | 22" | 0.007" | 0.5" | 0.5" | 1.125" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 1-2.20 | 22" | 0.007" | 0.5" | 0.55" | 1.03" | 0.191" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 1-2.20 | 28" | 0.007" | 0.5" | 0.55" | 0.95" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 1.5-2.60 | 22" | 0.008" | 0.5" | 0.63" | 1.2" | 0.191" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 1.5-2.60 | 28" | 0.008" | 0.5" | 0.63" | 1.275" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 1.75-3.30 | 22" | 0.01" | 0.5" | 0.98" | 1.38" | 0.191" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 1.75-3.30 | 28" | 0.01" | 0.5" | 0.98" | 1.46" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 2-4.00 | 28" | 0.012" | 0.5" | 0.95" | 1.55" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
7,500 Cycles of Useful Life | ||||||||||
| 0.55-1.00 | 28" | 0.0045" | 0.5" | 0.4" | 0.8" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |