Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When a hinge sticks, a door fails to return, or a mechanism loses its snap, the culprit is almost always a worn or incorrectly sized torsion spring. Engineers, makers, and repair technicians who need a reliable, dimensionally consistent torsion spring in 1.4mm wire diameter will find this range covers the most common OD and coil count combinations in a single listing.
Each spring is wound from 1.4mm wire diameter steel, with outer diameters ranging from 7mm to 20mm (approximately 0.28" to 0.79") and coil counts of 3, 6, or 9 turns. Opening angles span 60°, 90°, 120°, and 180°, available in both left-hand and right-hand wind orientations. Body length varies by coil count: 3-coil bodies are typically 4–5mm, 6-coil bodies 8–10mm, and 9-coil bodies 12–15mm.
Typical use cases include cabinet door hinges and lid return mechanisms, small appliance and tool trigger assemblies, and precision instrument or robotics linkage joints — all scenarios where a compact torsion spring with a defined opening angle and consistent torque output is required.
Consistent 1.4mm wire diameter across all variants ensures predictable torque output and dimensional fit in tight housings.
Outer diameters from 7mm to 20mm (0.28"–0.79") cover the most common small-to-medium torsion spring applications in a single product family.
Choose 3, 6, or 9 coils to balance body length against torque requirement — more coils deliver greater angular deflection capacity.
Both left-spring and right-spring orientations available, ensuring correct torque direction for your specific hinge or pivot assembly.
Pre-set opening angles of 60°, 90°, 120°, and 180° eliminate the need for custom bending in most standard mechanical designs.
Wound from steel wire with a natural finish; suitable for indoor mechanical assemblies, tooling fixtures, and light-duty cycling applications.
| Wire Diameter | 1.4 mm (0.055") |
|---|---|
| Outer Diameter (OD) | 7 mm – 20 mm (0.28" – 0.79") |
| Inner Diameter (ID) | Approx. 4.2 mm – 17.2 mm (varies by OD) |
| Coil Count | 3 / 6 / 9 coils (see variant options) |
| Body Length (approx.) | 3-coil: ~4–5 mm | 6-coil: ~8–10 mm | 9-coil: ~12–15 mm |
| Opening Angle | 60° / 90° / 120° / 180° |
| Wind Direction | Left spring / Right spring |
| Material | Steel wire |
| Surface Finish | Natural (uncoated) |
| Torque Rating | See variant options |
| Operating Temperature | Contact us to confirm |
The OD should match the bore or housing your spring sits in, with a small clearance (typically 0.5–1mm) to allow free rotation. The mandrel or shaft the spring wraps around should be slightly smaller than the spring's inner diameter. For example, a 10mm OD spring with 1.4mm wire has an inner diameter of approximately 7.2mm, so use a mandrel no larger than 7mm.
Wind direction determines which way the spring exerts torque. A left-hand (left spring) torsion spring winds counterclockwise when viewed from the front; a right-hand (right spring) winds clockwise. Choosing the wrong direction will cause the spring to unwind rather than store energy. Check your hinge or pivot direction before selecting.
More coils mean a longer body and greater angular deflection capacity before the spring reaches its elastic limit. Use 3-coil springs where space is tight and deflection is small. Choose 6 or 9 coils when you need the spring to travel through a larger angle repeatedly without fatigue. For most door-return and lid-hinge applications, 6 coils offer a good balance.
These springs are made from uncoated steel wire and are intended for indoor or protected environments. Prolonged exposure to moisture or humidity may cause surface oxidation. For outdoor or high-humidity applications, consider applying a light machine oil or contact us to confirm suitability for your specific environment.
The opening angle is the angle between the two legs of the spring in its free (unloaded) state. Select the angle that matches the geometry of your assembly when the spring is at rest. Common choices: 90° for right-angle hinges, 180° for flat-mounted return springs, 60° or 120° for angled linkages. If your application requires a different angle, contact us.
These springs are suitable for light-duty cycling applications. For high-cycle industrial machinery (millions of cycles), we recommend confirming the fatigue rating with us before ordering. Factors such as deflection angle, operating speed, and load will affect service life.
Measure your existing spring's wire diameter, outer diameter, coil count, leg angle, and wind direction. Match these to the variant options above. If you are replacing a broken spring and cannot measure it directly, measure the housing bore (for OD) and the shaft (for ID clearance), then select the closest available size. Contact us if you need help confirming compatibility.
