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When a flimsy spring causes your carefully built mechanism to fail mid-cycle, the frustration is real. Engineers, hobbyists, and model makers who demand consistent rotational force need a torsion spring that holds its geometry and torque rating across hundreds of cycles. These stainless steel torsion springs are engineered for exactly that — delivering reliable left-hand wound performance in compact assemblies where precision matters.
Each spring is wound from 2mm stainless steel wire with an outer diameter ranging from 12mm to 21mm (approximately 0.47 in to 0.83 in). Available in 1 to 5 active coils, the body length scales accordingly — typically 14mm to 60mm (approx. 0.55 in to 2.36 in). Rotation angles span 45°, 60°, 90°, 120°, 180°, and 270°, giving you precise control over the working deflection of your assembly.
Typical use cases include DIY scale model actuators requiring a left-hand torsion spring, small mechanical linkages and latch return mechanisms in maker projects, and precision instrument assemblies where a compact stainless steel coil spring for model mechanisms is needed to resist corrosion in humid or outdoor environments.
Consistent left-hand winding direction across all variants ensures correct torque application in your specific mechanism orientation.
Stainless steel construction provides corrosion resistance and maintains spring geometry under repeated deflection cycles in demanding environments.
Choose from 12mm, 14mm, 16mm, 18mm, or 21mm outer diameter to match your housing bore or shaft clearance requirements precisely.
Available in 45°, 60°, 90°, 120°, 180°, and 270° working angles — select the deflection that matches your mechanism's travel range.
Coil count directly affects spring rate and body length. More coils yield a softer spring with longer body; fewer coils give a stiffer, more compact spring.
Compact dimensions and precise specifications make these springs ideal for scale models, robotic linkages, latch mechanisms, and precision instrument assemblies.
| Material | Stainless Steel |
|---|---|
| Wire Diameter | 2mm (0.079 in) |
| Outer Diameter Options | 12mm / 14mm / 16mm / 18mm / 21mm |
| Active Coils | 1 / 2 / 3 / 4 / 5 |
| Wind Direction | Left-hand (Linke Feder) |
| Working Angle Options | 45° / 60° / 90° / 120° / 180° / 270° |
| Body Length (approx.) | See variant options |
| Inner Diameter | See variant options |
| Spring Rate | See variant options |
| Surface Finish | Natural stainless (uncoated) |
| Application | DIY models, mechanisms, precision assemblies |
Measure the bore or housing your spring will sit inside, then select an outer diameter (OD) that fits with a small clearance — typically 0.5mm to 1mm smaller than the bore. For shaft-mounted applications, the inner diameter (ID) must be larger than the shaft diameter. Check the variant options for ID values, or contact us to confirm fit.
The working angle is the angular deflection the spring is designed to exert torque through. For example, a 90° spring is intended to be twisted 90° from its free position during operation. Select the angle that matches the rotational travel of your mechanism's arm or lever.
More active coils result in a lower spring rate (softer spring) and a longer body length. Fewer coils produce a stiffer spring with a shorter body. If your assembly has limited axial space, choose fewer coils; if you need a gentler return force, choose more coils.
Yes. Stainless steel provides good resistance to rust and oxidation, making these springs suitable for use in humid, damp, or mildly corrosive environments. For highly aggressive chemical environments, please contact us to confirm suitability.
Left-hand winding means the coils spiral in a counter-clockwise direction when viewed from the leg end. This determines which direction of rotation tightens versus loosens the spring. If your mechanism requires a right-hand wound spring, these variants are not compatible — please contact us before ordering.
Yes. The compact 2mm wire diameter and range of outer diameters (12–21mm) make these springs well-suited for scale model actuators, robotic joint return mechanisms, latch springs, and small precision instrument assemblies. Select the coil count and angle that match your mechanism's torque and travel requirements.
The inner diameter of the spring must be larger than the shaft or pin diameter it will ride on. Inner diameter values vary by outer diameter variant — refer to the variant options or contact us with your shaft size and we will confirm compatibility before you order.
