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Extension spring with turnable loops

Extension springs with normal loops or hooks should not be used for up to more than 60% of the permitted tension, as the loop or the hook of the spring is weaker than the rest of the spring. In order to be able to use the spring to its maximum, without running the risk of loop breaks, you can instead use this series of extension springs with hardened loops, which have tapered ends.

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See "full-screen" models of the springs and download a PDF file of the designed compression, tension or torsion spring!

Lesjöfors configurator for compression, tension and torsion springs allows you to design a spring based on your demands. Our CAD configurator stretches from wire diameter 0,1mm up to 15mm.

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3. Save file

Cat.no Dt De L0 c 3D CAD
3828 2,5 17 110 5.93
3829 2,5 17 170 2.84
3830 2,5 17 230 1.86
3831 2,5 20 140 2.18
3832 2,5 20 200 1.28
3833 2,5 20 260 0.91
3834 2,5 24 110 1.82
3835 2,5 24 170 0.87
3836 2,5 24 230 0.57
3837 3 18 120 11.37
3838 3 18 180 5.82
3839 3 18 240 3.98
3840 3 23 150 3.27
3841 3 23 210 1.98
3842 3 23 270 1.44
3843 3 28 120 2.46
3844 3 28 180 1.26
3845 3 28 240 0.86
3847 3,5 22 200 6.44
3848 3,5 22 260 4.39
3849 3,5 27 170 4.06
3850 3,5 27 230 2.56
3851 3,5 27 290 1.87
3852 3,5 32 140 3.22
3853 3,5 32 200 1.76
3854 3,5 32 260 1.2
3855 4 24 150 15.9
3856 4 24 210 9.18
3857 4 24 270 6.46
3858 4 30 180 5.3
3859 4 30 240 3.45
3860 4 30 300 2.56
3861 4 35 150 4.27
3862 4 35 210 2.47
3863 4 35 270 1.73
3864 5 30 180 22.64
3865 5 30 240 13.58
3866 5 30 300 9.7
3867 5 35 210 9.83
3868 5 35 270 6.55
3869 5 35 330 4.91
3870 5 40 180 8.25
3871 5 40 240 4.95
3872 5 40 300 3.54
3873 6 36 210 29.64
3874 6 36 270 18.45
3875 6 36 330 13.4
3876 6 42 240 13.16
3877 6 42 300 8.98
3878 6 42 360 6.82
3879 6 50 210 9.39
3880 6 50 270 5.85
3881 6 50 330 4.25
5017 3,5 22 140 11.78
6350 2,5 17 140 3.84
6351 2,5 17 200 2.25
6352 2,5 17 260 1.59
6353 2,5 20 110 3.38
6354 2,5 20 170 1.61
6355 2,5 20 230 1.06
6356 2,5 24 140 1.18
6357 2,5 24 200 0.69
6358 2,5 24 260 0.49
6360 3 18 210 4.7
6361 3 18 270 3.42
6362 3 23 120 4.8
6363 3 23 180 2.46
6364 3 23 240 1.68
6365 3 28 150 1.68
6366 3 28 210 1.02
6367 3 28 270 0.74
6368 3,5 22 170 8.33
6369 3,5 22 230 5.25
6370 3,5 22 290 3.83
6371 3,5 27 140 5.75
6372 3,5 27 200 3.14
6373 3,5 27 260 2.14
6375 3,5 32 230 1.44
6376 3,5 32 290 1.05
6377 4 24 180 11.64
6378 4 24 240 7.58
6379 4 24 300 5.62
6380 4 30 150 7.24
6381 4 30 210 4.18
6382 4 30 270 2.94
6383 4 35 180 3.13
6384 4 35 240 2.04
6385 4 35 300 1.51
6386 5 30 210 16.98
6387 5 30 270 11.32
6388 5 30 330 8.49
6389 5 35 180 13.1
6390 5 35 240 7.86
6391 5 35 300 5.61
6392 5 40 210 6.19
6393 5 40 270 4.13
6394 5 40 330 3.09
6395 6 36 240 22.74
6396 6 36 300 15.52
6397 6 36 360 11.78
6398 6 42 210 17.15
6399 6 42 270 10.68
6401 6 50 240 7.21
6402 6 50 300 4.92
6403 6 50 360 3.73
6463 3 18 150 7.76
6467 3,5 32 170 2.28
6487 6 42 330 7.75