Extension Spring/English Hook

  Side-hook extension springs refer to springs with hooks designed on the edge rather than at the spring’s mean diameter.This design allows the hooks to achieve more precise positioning during extension and provides more stable tension when under load.  Side-hook extension springs are suitable for applications where the hooks engage on flat or planar surfaces. Like other extension springs, they operate by exerting a counteracting force using the restoring tension when stretched.

  Long German hook extension springs are a common type of extension spring featuring long German-style triangular hooks at both ends.This design increases the contact area between the hooks and the fixture under load, enhancing grip and thereby improving the spring’s reliability.  Long German hook extension springs are mostly used in electronic and electrical products. Like other extension springs, they operate by exerting a counteracting force when stretched, utilizing the restoring tension force.

  Loose-coil extension springs refer to springs where the coils are not tightly adjacent but have a certain gap between them.Compared to traditional close-coil extension springs, this design offers unique characteristics and application scenarios. The spring works by exerting a counteracting force when stretched or extended, utilizing the restoring tension force.  Loose-coil extension springs are a type of spring known for their excellent elasticity and long travel, and they are widely used in many fields. If you need an extension spring with good flexibility and a long stroke, loose-coil extension springs are a great choice.