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Clock spring

The clock spring (also referred to as a flat torsion spring) is designed to produce a torsional force (circular movement). In contrast to the tightly coiled motor spring on the previous page, the clock spring has open coils that, when mounted correctly, reduces fricton to zero. However, torque capacity is reduced as a result. The standard range is made from rounded edge stainless steel, which affords a better fatigue life.

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  • All measurements are in mm

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.

Click for information about 3D CAD!

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2. Choose item in the table

3. Save file

Cat.no t b A Mn Nmm Mn Nmm 2 3D CAD Order
900 0,5 3 7 198 158
901 0,5 5 7 329 263
902 0,5 3 7 198 158
903 0,5 5 7 329 263
904 0,6 4 8 374 300
905 0,6 6 8 562 449
906 0,6 4 8 374 300
907 0,6 6 8 562 449
908 0,7 4 10 506 405
909 0,7 7 10 886 709
910 0,7 4 10 506 405
911 0,7 7 10 886 709
912 0,8 5 12 816 653
913 0,8 8 12 1306 1044
914 0,8 5 12 816 653
915 0,8 8 12 1306 1044
916 1 6 14 1500 1200
917 1 10 14 2500 2000
918 1 6 14 1500 1200
919 1 10 14 2500 2000
920 1,25 7 16 2625 2100
921 1,25 12 16 4500 3600
922 1,25 7 16 2625 2100
923 1,25 12 16 4500 3600
924 1,5 10 20 5400 4320
925 1,5 15 20 8100 6480
926 1,5 10 20 5400 4320
927 1,5 15 20 8100 6480
928 2 12 24 11200 8960
929 2 20 24 18667 14933
930 2 12 24 11200 8960
931 2 20 24 18667 14933
932 2,5 15 28 21094 16875
933 2,5 25 28 35156 28125
934 2,5 15 28 21094 16875
935 2,5 25 28 33854 28125
936 3 18 32 36450 29160
937 3 30 32 60750 48600
938 3 18 32 36450 29160
939 3 30 32 60750 48600