Constant-Force Springs
No matter how far you extend them, these springs pull back with the same amount of force. Compact and tightly coiled, these springs extend to multiple times their length to pull objects in a linear direction. 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.
| Extended Lg. | Load, lbs. | Load Tolerance, lbs. | Thick. | Wd. | ID | ID Tolerance | OD | OD Tolerance | Mounting Hole Dia. | Number of Mounting Holes | Material | Each | |
3,000 Cycles of Useful Life | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12" | 0.37 | -0.04 to 0.04 | 0.003" | 0.187" | 0.21" | -0.03" to 0.03" | 0.3" | -0.03" to 0.03" | 0.096" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 12" | 1.23 | -0.12 to 0.12 | 0.005" | 0.375" | 0.38" | Not Rated | 0.47" | Not Rated | 0.131" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 15" | 0.49 | -0.05 to 0.05 | 0.004" | 0.187" | 0.29" | -0.03" to 0.03" | 0.4" | -0.04" to 0.04" | 0.096" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 15" | 0.66 | -0.07 to 0.07 | 0.004" | 0.25" | 0.28" | -0.03" to 0.03" | 0.4" | -0.04" to 0.04" | 0.13" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 15" | 0.83 | -0.09 to 0.09 | 0.004" | 0.312" | 0.28" | -0.03" to 0.03" | 0.4" | -0.04" to 0.04" | 0.13" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 17" | 1.03 | -0.11 to 0.11 | 0.005" | 0.312" | 0.37" | -0.04" to 0.04" | 0.5" | -0.05" to 0.05" | 0.13" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 18" | 0.75 | -0.08 to 0.08 | 0.005" | 0.31" | 0.42" | -0.05" to 0.05" | 0.56" | -0.06" to 0.06" | 0.131" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 22" | 1.12 | -0.12 to 0.12 | 0.006" | 0.37" | 0.51" | -0.06" to 0.06" | 0.62" | -0.07" to 0.07" | 0.131" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 22" | 2.3 | -0.23 to 0.23 | 0.007" | 0.5" | 0.5" | Not Rated | 0.7" | Not Rated | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 22" | 2.87 | -0.28 to 0.28 | 0.007" | 0.625" | 0.5" | Not Rated | 0.71" | Not Rated | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 24" | 1.48 | -0.15 to 0.15 | 0.006" | 0.375" | 0.45" | -0.05" to 0.05" | 0.62" | -0.07" to 0.07" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 24" | 4 | -0.4 to 0.40 | 0.009" | 0.75" | 0.62" | -0.07" to 0.07" | 0.82" | -0.09" to 0.09" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 24" | 4.93 | -0.49 to 0.49 | 0.012" | 0.625" | 0.86" | Not Rated | 1.11" | Not Rated | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 25" | 1.97 | -0.2 to 0.20 | 0.006" | 0.5" | 0.45" | -0.05" to 0.05" | 0.65" | -0.07" to 0.07" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 26" | 1.62 | -0.17 to 0.17 | 0.007" | 0.5" | 0.59" | -0.06" to 0.06" | 0.75" | -0.08" to 0.08" | 0.131" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 28" | 6.88 | -0.69 to 0.69 | 0.014" | 0.75" | 1" | Not Rated | 1.29" | Not Rated | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 28" | 9.19 | -0.92 to 0.92 | 0.014" | 1" | 1.1" | Not Rated | 1.31" | Not Rated | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 30" | 2.63 | -0.27 to 0.27 | 0.008" | 0.5" | 0.59" | -0.06" to 0.06" | 0.82" | -0.09" to 0.09" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 30" | 3.29 | -0.33 to 0.33 | 0.008" | 0.625" | 0.61" | -0.07" to 0.07" | 0.83" | -0.09" to 0.09" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 32" | 14.76 | -1.5 to 1.50 | 0.018" | 1.25" | 1.28" | Not Rated | 1.65" | Not Rated | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 32" | 17.71 | -1.7 to 1.70 | 0.018" | 1.5" | 1.38" | Not Rated | 1.64" | Not Rated | 0.256" | 2 | 301 Stainless Steel | 00000000 | 0000 |
| 33" | 4.12 | -0.42 to 0.42 | 0.01" | 0.625" | 0.73" | -0.08" to 0.08" | 0.99" | -0.1" to 0.10" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 33" | 4.95 | -0.5 to 0.50 | 0.01" | 0.75" | 0.71" | -0.08" to 0.08" | 0.97" | -0.1" to 0.10" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 34" | 3.5 | -0.35 to 0.35 | 0.01" | 0.68" | 0.85" | -0.09" to 0.09" | 1.12" | -0.12" to 0.12" | 0.187" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 36" | 28.71 | -2.87 to 2.87 | 0.025" | 1.75" | 1.88" | Not Rated | 2.16" | Not Rated | 0.256" | 2 | 301 Stainless Steel | 0000000 | 0000 |
| 36" | 32.81 | -3.28 to 3.28 | 0.025" | 2" | 1.78" | Not Rated | 2.11" | Not Rated | 0.256" | 2 | 301 Stainless Steel | 00000000 | 00000 |
| 38" | 5 | -0.5 to 0.50 | 0.012" | 0.81" | 1.02" | -0.11" to 0.11" | 1.4" | -0.14" to 0.14" | 0.187" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 39" | 5.94 | -0.6 to 0.60 | 0.012" | 0.75" | 0.88" | -0.09" to 0.09" | 1.19" | -0.12" to 0.12" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 39" | 7.92 | -0.8 to 0.80 | 0.012" | 1" | 0.88" | -0.09" to 0.09" | 1.2" | -0.12" to 0.12" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 40" | 10.6 | -1.06 to 1.06 | 0.016" | 1" | 1.2" | -0.12" to 0.12" | 1.52" | -0.16" to 0.16" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 43" | 7 | -0.7 to 0.70 | 0.014" | 1" | 1.19" | -0.12" to 0.12" | 1.5" | -0.15" to 0.15" | 0.187" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 50" | 16.5 | -1.65 to 1.65 | 0.02" | 1.25" | 1.47" | -0.15" to 0.15" | 1.89" | -0.19" to 0.19" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 52" | 24.8 | -2.48 to 2.48 | 0.025" | 1.5" | 1.77" | -0.18" to 0.18" | 2.23" | -0.23" to 0.23" | 0.265" | 2 | 301 Stainless Steel | 0000000 | 00000 |
| 52" | 33 | -0.33 to 0.33 | 0.025" | 2" | 1.78" | -0.18" to 0.18" | 2.22" | -0.22" to 0.22" | 0.265" | 2 | 301 Stainless Steel | 00000000 | 00000 |
| 60" | 40.9 | -4.09 to 4.09 | 0.031" | 2" | 2.5" | -0.25" to 0.25" | 3.03" | -0.31" to 0.31" | 0.265" | 2 | 301 Stainless Steel | 0000000 | 00000 |
25,000 Cycles of Useful Life | |||||||||||||
| 18" | 0.23 | -0.03 to 0.03 | 0.004" | 0.25" | 0.53" | -0.06" to 0.06" | 0.62" | -0.07" to 0.07" | 0.13" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 18" | 0.36 | -0.04 to 0.04 | 0.005" | 0.312" | 0.69" | -0.07" to 0.07" | 0.78" | -0.08" to 0.08" | 0.13" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 25" | 0.43 | -0.05 to 0.05 | 0.005" | 0.375" | 0.65" | -0.07" to 0.07" | 0.78" | -0.08" to 0.08" | 0.13" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 25" | 0.52 | -0.06 to 0.06 | 0.006" | 0.375" | 0.7" | -0.07" to 0.07" | 0.9" | -0.09" to 0.09" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 25" | 0.7 | -0.07 to 0.07 | 0.006" | 0.5" | 0.8" | -0.08" to 0.08" | 0.92" | -0.1" to 0.10" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 33" | 0.93 | -0.1 to 0.10 | 0.008" | 0.5" | 1.07" | -0.11" to 0.11" | 1.23" | -0.13" to 0.13" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 35" | 1.46 | -0.15 to 0.15 | 0.01" | 0.625" | 1.36" | -0.14" to 0.14" | 1.53" | -0.16" to 0.16" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 45" | 2.09 | -0.21 to 0.21 | 0.012" | 0.75" | 1.6" | -0.16" to 0.16" | 1.82" | -0.19" to 0.19" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 45" | 2.8 | -0.28 to 0.28 | 0.012" | 1" | 1.6" | -0.16" to 0.16" | 1.84" | -0.19" to 0.19" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 46" | 4.1 | -0.41 to 0.41 | 0.016" | 1" | 1.96" | -0.2" to 0.20" | 2.21" | -0.23" to 0.23" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 48" | 3.5 | -0.35 to 0.35 | 0.015" | 1" | 1.96" | -0.2" to 0.20" | 2.2" | -0.22" to 0.22" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 48" | 3.86 | -0.39 to 0.39 | 0.016" | 1.25" | 2.28" | Not Rated | 2.52" | Not Rated | 0.191" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 48" | 4.37 | -0.44 to 0.44 | 0.015" | 1.25" | 2.03" | -0.21" to 0.21" | 2.29" | -0.23" to 0.23" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 48" | 5.21 | -0.52 to 0.52 | 0.018" | 1.5" | 2.65" | Not Rated | 2.86" | Not Rated | 0.256" | 2 | 301 Stainless Steel | 00000000 | 00000 |
| 55" | 5.83 | -0.59 to 0.59 | 0.02" | 1.25" | 2.53" | -0.26" to 0.26" | 2.82" | -0.29" to 0.29" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 56" | 7.24 | -0.72 to 0.72 | 0.025" | 1.5" | 3.54" | Not Rated | 3.75" | Not Rated | 0.256" | 2 | 301 Stainless Steel | 00000000 | 00000 |
| 60" | 8.74 | -0.88 to 0.88 | 0.025" | 1.5" | 3.35" | -0.34" to 0.34" | 3.7" | -0.37" to 0.37" | 0.265" | 2 | 301 Stainless Steel | 0000000 | 00000 |
| 60" | 11.7 | -1.17 to 1.17 | 0.025" | 2" | 3.37" | -0.34" to 0.34" | 3.68" | -0.37" to 0.37" | 0.265" | 2 | 301 Stainless Steel | 00000000 | 00000 |
| 70" | 14.4 | -1.44 to 1.44 | 0.031" | 2" | 4.35" | -0.44" to 0.44" | 4.74" | -0.48" to 0.48" | 0.265" | 2 | 301 Stainless Steel | 0000000 | 00000 |
50,000 Cycles of Useful Life | |||||||||||||
| 30" | 0.44 | -0.07 to 0.07 | 0.006" | 0.5" | 1" | -0.1" to 0.10" | 1.22" | -0.13" to 0.13" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 36" | 0.58 | -0.09 to 0.09 | 0.008" | 0.5" | 1.49" | -0.15" to 0.15" | 1.61" | -0.17" to 0.17" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 50" | 1.31 | -0.2 to 0.20 | 0.012" | 0.75" | 2.24" | -0.23" to 0.23" | 2.4" | -0.24" to 0.24" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
Clip-On Constant-Force Springs
Clip the end onto a flat surface to install—no fasteners needed. Once installed, these springs pull back with the same amount of force no matter how far you extend them. Compact and tightly coiled, they extend to multiple times their length to pull objects in a linear direction. All are stainless steel for corrosion resistance. When using, please allow for 1 1/2 extra 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.
| Extended Lg. | Load, lbs. | Load Tolerance, lbs. | Thick. | Wd. | ID | ID Tolerance | OD | OD Tolerance | For Max. Mounting Surface Thick. | Material | Each | |
5,000 Cycles of Useful Life | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 24" | 1.5 | -0.15 to 0.15 | 0.006" | 0.5" | 0.53" | -0.05" to 0.05" | 0.68" | -0.031" to 0.03" | 0.138" | 301 Stainless Steel | 000000 | 00000 |
| 24" | 1.75 | -0.17 to 0.17 | 0.007" | 0.5" | 0.63" | -0.05" to 0.05" | 0.725" | -0.031" to 0.03" | 0.136" | 301 Stainless Steel | 000000 | 0000 |
13,000 Cycles of Useful Life | ||||||||||||
| 24" | 0.2 | -0.02 to 0.02 | 0.003" | 0.25" | 0.35" | -0.02" to 0.02" | 0.45" | -0.031" to 0.03" | 0.119" | 301 Stainless Steel | 000000 | 0000 |
| 24" | 0.4 | -0.04 to 0.04 | 0.004" | 0.25" | 0.4" | -0.04" to 0.04" | 0.55" | -0.031" to 0.03" | 0.117" | 301 Stainless Steel | 000000 | 0000 |
| 24" | 0.6 | -0.06 to 0.06 | 0.005" | 0.25" | 0.45" | -0.05" to 0.05" | 0.6" | -0.031" to 0.03" | 0.115" | 301 Stainless Steel | 000000 | 0000 |
| 24" | 0.8 | -0.08 to 0.08 | 0.005" | 0.312" | 0.5" | -0.05" to 0.05" | 0.675" | -0.031" to 0.03" | 0.115" | 301 Stainless Steel | 000000 | 0000 |
| 24" | 1 | -0.1 to 0.10 | 0.006" | 0.312" | 0.51" | -0.05" to 0.05" | 0.6" | -0.031" to 0.03" | 0.138" | 301 Stainless Steel | 000000 | 0000 |
| 24" | 1.25 | -0.12 to 0.12 | 0.006" | 0.375" | 0.55" | -0.05" to 0.05" | 0.675" | -0.031" to 0.03" | 0.138" | 301 Stainless Steel | 000000 | 0000 |
Linear Wave Springs
Similar to disc springs, these linear springs are good for absorbing vibration and filling in gaps along the length of an object. Their thin profile allows them to fit in tight spots.
For technical drawings and 3-D models, click on a part number.
| Wd. | Lg. | Ht. | Compressed Ht. @ Working Load | Working Load, lbs. | Material | Each | |
0.012" Thick. | |||||||
|---|---|---|---|---|---|---|---|
| 0.25" | 1.5" | 0.225" | 0.125" | 2.2 | High-Carbon Steel | 000000 | 00000 |
| 0.25" | 3" | 0.225" | 0.125" | 7.8 | High-Carbon Steel | 000000 | 0000 |
| 0.25" | 4.5" | 0.225" | 0.125" | 13 | High-Carbon Steel | 000000 | 0000 |
| 0.25" | 6" | 0.225" | 0.125" | 19 | High-Carbon Steel | 0000000 | 0000 |
| 0.375" | 1.5" | 0.225" | 0.125" | 3.5 | High-Carbon Steel | 000000 | 0000 |
| 0.375" | 3" | 0.225" | 0.125" | 11 | High-Carbon Steel | 000000 | 0000 |
| 0.375" | 4.5" | 0.225" | 0.125" | 20 | High-Carbon Steel | 000000 | 0000 |
| 0.375" | 6" | 0.225" | 0.125" | 25 | High-Carbon Steel | 0000000 | 0000 |
0.02" Thick. | |||||||
| 0.25" | 7.5" | 0.25" | 0.15" | 44 | High-Carbon Steel | 0000000 | 0000 |
| 0.375" | 7.5" | 0.25" | 0.15" | 74 | High-Carbon Steel | 0000000 | 0000 |
0.025" Thick. | |||||||
| 0.25" | 4.5" | 0.275" | 0.175" | 21 | High-Carbon Steel | 000000 | 0000 |
| 0.25" | 9" | 0.275" | 0.175" | 50 | High-Carbon Steel | 0000000 | 0000 |
| 0.375" | 4.5" | 0.275" | 0.175" | 29 | High-Carbon Steel | 0000000 | 0000 |
| 0.375" | 9" | 0.275" | 0.175" | 76 | High-Carbon Steel | 0000000 | 0000 |
0.045" Thick. | |||||||
| 0.25" | 3" | 0.325" | 0.225" | 12 | High-Carbon Steel | 000000 | 0000 |
| 0.25" | 6" | 0.325" | 0.225" | 42 | High-Carbon Steel | 0000000 | 0000 |
| 0.25" | 9" | 0.325" | 0.225" | 83 | High-Carbon Steel | 0000000 | 0000 |
| 0.25" | 12" | 0.325" | 0.225" | 120 | High-Carbon Steel | 0000000 | 00000 |
| 0.375" | 3" | 0.325" | 0.225" | 20 | High-Carbon Steel | 000000 | 0000 |
| 0.375" | 6" | 0.325" | 0.225" | 73 | High-Carbon Steel | 0000000 | 0000 |
| 0.375" | 9" | 0.325" | 0.225" | 133 | High-Carbon Steel | 0000000 | 00000 |
| 0.375" | 12" | 0.325" | 0.225" | 190 | High-Carbon Steel | 0000000 | 00000 |