Applications
Where this spring style fits
Review best-fit uses, assembly constraints and situations where another spring style may be a better choice.
View application guidance →Torsion Springs
Custom Flat-Wire Torsion Springs
Helical torsion springs with a defined flat material section, specified by section orientation, leg geometry and torque at working angles.
- Specification
- Drawing and working requirement
- Dimensions
- Confirmed for the assembly
- Performance
- Specified at working positions
- Quotation
- Submit dimensions and quantity
About Custom Flat-Wire Torsion Springs
Flat-wire torsion springs use a non-round material section in a helical torsion body. Section width, thickness and winding orientation must be shown separately from coil diameter. The legs transfer torque into the assembly, so their contact points and working angles form part of the performance specification. A planar spiral strip spring is a different geometry and should not be selected from this page by name alone.
Key Design Characteristics
- Provide a section view showing width, thickness and orientation.
- Identify the support shaft and the full movement envelope.
- Dimension legs to their functional contact points.
Choosing Between Related Designs
Round-wire helical torsion springs need a different section calculation. A flat spiral or clock spring works through another body arrangement. Confirm the geometry in a drawing before comparing force or torque requirements.
Specification and Inspection Review
State section tolerances and angular measurement references. Agree a torque-test fixture that locates the body and loads the legs at the intended contact points, with clearance checked through the working movement.
Product Specification
What to Define for This Spring
Use these product-specific inputs to describe your requirement. Final dimensions, material and performance are confirmed against the drawing and operating conditions.
| Specification item | What to define |
|---|---|
| Flat section | Width, thickness, edge condition and winding orientation. |
| Helical body | Coil diameter, body width and active turns. |
| Leg arrangement | Free angle, leg forms and contact-arm lengths. |
| Torque positions | Torque at defined installed angles and direction of rotation. |
| Support and duty | Shaft clearance, axial space, material and cycle range. |
Next Design Decisions
Next Steps for Your Spring Design
Once the spring style is selected, confirm how it works in the assembly, which material suits the environment, how it will be manufactured and which dimensions and performance points should be controlled on the drawing.
Materials
Choose the material for the environment
Review flat-wire grade, condition and edges together with the required bend geometry, environment and angular cycling.
Compare spring materials →Manufacturing
Plan prototype and production
Review forming, heat treatment, secondary operations, inspection and the path from first samples to repeat production.
View manufacturing capabilities →Engineering Data
Use the engineering guide for design support
Use the engineering library to review materials, sizing considerations and applicable standards for the custom design.
Open Spring Engineering Guide →Material Direction
Common Material Families to Review
The links below are selection guides, not a claim that every grade is suitable for every size or load.
Related Spring Design Guides
Review the design and measurement requirements for this spring family.
Compare Designs
Related Spring Products
Use these alternatives when the available space, connection style, travel or force direction changes.
Torsion Springs
Double Torsion Springs
Custom Double Torsion Springs manufactured to your drawing, dimensions, load or torque, material, working environment and production requirements.
Torsion Springs
Double-Leg Torsion Springs
A torsion spring with two working arms used to share rotary load across a wider mechanism or provide balanced return around a common pivot.
Torsion Springs
External / Parallel Double Torsion Springs
Side-by-side double torsion spring layouts, specified by coil spacing, bridge geometry, winding direction and torque at working angles.
Product Questions
Flat-Wire Torsion Springs FAQ
Is flat wire the same as a flat spiral spring?
No. Flat wire describes the material section; this page addresses a helical torsion body. A planar spiral requires a different geometry specification.
Why do leg contact positions matter?
The assembly applies load through those positions. Define the torque, angle and contact-arm geometry together so the requirement can be reproduced.
RFQ
Send the Working Requirement
A drawing is ideal. If you do not have one yet, provide the dimensions, load or torque, travel, environment and expected quantity that matter in the assembly.
CustomSprings Engineering Catalog
Request This Spring
Send your dimensions, quantity and drawing for engineering review.