Retractable devices depend on stable torque output. If the torque is too low, the mechanism may not return completely. If it is too high, the product may feel rough, wear faster, or become unsafe for users.
Common applications
- Cord reels and cable reels
- Seat belt retractor mechanisms
- Retractable consumer products
- Rotary return systems in compact devices
Key design inputs
- Required starting torque and ending torque
- Working angle and number of turns
- Arbor diameter and housing diameter
- Cycle life, lubrication, and working temperature
Selection notes
Torque should be matched to the real load and friction of the mechanism. A sample test with the final housing is important because the same spring may behave differently in different assemblies.
For related product information, visit power springs. For drawings, samples, or project support, contact Shenzhen Leading Spring.
FAQ
What torque data is needed for a power spring?
Starting torque, ending torque, working turns, and return force requirements are the key data.
Can a power spring fit a compact housing?
Yes, but housing diameter, strip width, and arbor size must be checked early in the design.
What causes unstable return force?
Excess friction, incorrect torque range, poor lubrication, and unsuitable material can all affect return stability.