Custom Clock Springs

Custom Clock Springs

Introduction to Clock, Power, Motor and Spiral Torsion Springs

All clock springs are made from strip material, also referred to as flat wire. These springs typically will have attachment/anchoring features on both ends; often the products have a formed hook, slot/hole and formed tang. Spiral torsion springs will have spacing between the spiral coils which allow it to be torqued without binding.  Alternatively, some clock and motor springs are wound and are usually maintained in a keeper/housing until installed in the application. Spiral Torsion springs are typically made from annealed (soft) material that is then post heat-treated to the specified spring temper.  Clock, power and motor springs are typically wound from spring tempered material, which is why they require a keeper/housing.

Manufacturing Considerations – Custom Clock Springs

Clock, power, motor and spiral torsion springs can be made of many different material types, including:

  • Stainless steel
  • Carbon
  • High temp nickel alloy
  • Copper
  • Many other material types depending on the product requirements    

Some items to consider when designing springs for any application include:

  • The space/envelope where the spring will need to fit
  • The environment the spring will need to survive in (corrosive, high or low temperature)
  • Cycle life,
  • Forces required and the stresses associated with those forces for the chosen material types and sizes.

There are numerous other factors to consider and all can have an impact on cost. Designing a spring for manufacturability and cost can at times be a challenge.  Consulting with knowledgeable spring manufacturers and their engineering departments can minimize these challenges and cost drivers.

Customer Case Study – Clock Springs

A designer and manufacturer of a technical consumer product application had a general design of a spiral torsion spring that would fit in the envelope/space that had been designed prior to designing a spring. This customer brought the specifications to Orlando Spring and asked for engineering assistance to establish the specification of this spring.  This included the material size and type to meet the torque requirements and to withstand the temperatures that it would be subjected to.  Initially the customer believed he would need a stainless steel material, but in working with Orlando Spring’s engineering team, it was determined that a high carbon steel would be better for the torque and the stresses that would be applied to this spring.  Furthermore, a Zinc plating would provide the corrosion resistance requirement. This solution resulted in a cost effective spring (approximately 30% unit cost savings) as compared to the higher cost of a stainless steel material.

 

Our Current Aerospace Customers

For your next clock springs project please reach us on our Contact Us page or call us at (562) 594-8411.