Extension springs
An extension spring, also called a tension spring, resists a load that pulls it apart. Its coils sit tight at rest, with initial tension, and each end finishes in a loop, a hook or an insert. We offer ten end types.
Ends
End types
Each end can have its own type. Pick them in the request, or describe another end.
Full centered loop
Full twisted loop
Half loop
Double loop
Loop on the side
Reduced loop
Extended hook
Swivel hook
Swivel threaded rod
Threaded plug
Specifications
What we need to know
Give the values you know. A drawing, a photo or the target quantity helps us fill in the rest.
- dWire diameter
- DeOutside diameter
- NTotal coils
- nActive coils
- LBody length
- L0Length inside the loops
- TiInitial tension
- L1Length at position 1
- f1Deflection at position 1
- P1Load at position 1
- L2Length at position 2
- f2Deflection at position 2
- P2Load at position 2
Also give the material, the finish, the winding direction and the use (static or dynamic).
Fill in the request onlineExamples
Parts made by Foster
A spring to replace or a part to develop?
Send your drawing or a photo, or call us at 450 372-0812.