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Finding a torsion spring that matches your exact coil count, outer diameter, and leg angle can be a frustrating bottleneck for engineers, repair technicians, and serious DIYers. These left-hand wound torsion springs are available in a wide matrix of configurations — wire diameter 1.5 mm, outer diameters from 8 mm to 16 mm (0.31" to 0.63"), coil counts from 3 to 9, and leg angles of 60°, 90°, 120°, and 180° — so you can match the spring to your mechanism rather than the other way around. Each pack contains 10 pieces.
Each spring is formed from spring steel wire with a 1.5 mm (0.059") diameter. The outer diameter spans 8–16 mm (0.31"–0.63"), with a corresponding inner diameter that varies by OD selection. The coil body length scales with the number of active coils (3–9), and the straight legs extend at your chosen angle. The left-hand wind direction means the spring tightens when rotated clockwise when viewed from the leg end.
Typical use cases include cabinet door hinges and lid mechanisms requiring left-hand torque, small appliance return springs for levers and triggers, automotive interior clip assemblies, and custom jig or fixture designs where a specific leg angle is critical. The multi-variant format also makes these torsion springs well-suited for prototyping and small-batch production runs where several configurations need to be tested side by side.
Tightens under clockwise rotation (viewed from leg end) — correct for mechanisms that require left-hand torque return.
Wire dia 1.5 mm, OD 8–16 mm, 3–9 active coils, and four leg angles (60°/90°/120°/180°) — select the exact combination you need.
Formed from spring steel for consistent elastic return, fatigue resistance, and reliable torque delivery across repeated cycles.
Each order ships 10 identical springs — enough for prototyping, small-batch production, or keeping spares on hand for maintenance.
Four fixed leg angles (60°, 90°, 120°, 180°) allow direct drop-in replacement or new-design integration without bending or reworking legs.
More active coils increase angular deflection capacity and reduce spring rate — choose 3–9 coils to tune stiffness for your load requirement.
| Wire Diameter | 1.5 mm (0.059") |
|---|---|
| Outer Diameter (OD) | 8 mm / 9 mm / 10 mm / 11 mm / 12 mm / 14 mm / 15 mm / 16 mm — see variant options |
| Inner Diameter (ID) | See variant options (OD minus 2× wire dia) |
| Number of Active Coils | 3 / 4 / 5 / 6 / 7 / 8 / 9 — see variant options |
| Leg Angle | 60° / 90° / 120° / 180° — see variant options |
| Wind Direction | Left-hand (LH) |
| Material | Spring Steel |
| Finish | See variant options |
| Quantity per Pack | 10 pieces |
| Body Length | See variant options (scales with coil count) |
The spring's inner diameter (ID) must be slightly larger than the mandrel or shaft it mounts on. The ID equals the outer diameter minus twice the wire diameter (ID = OD − 2 × 1.5 mm). For example, the 10 mm OD variant has an ID of approximately 7 mm. Select an OD so the resulting ID gives 0.1–0.5 mm clearance over your shaft.
A left-hand wound torsion spring tightens (stores energy) when its coil body is rotated clockwise as viewed from the end where the active leg is attached. To check your existing spring: hold it vertically and look at the coil direction — if the wire winds from bottom-left to top-right (like a standard screw thread in reverse), it is left-hand wound. If your mechanism rotates counterclockwise to load the spring, you need a right-hand spring instead.
More active coils lower the spring rate (less torque per degree of rotation) and increase the maximum angular deflection before the spring reaches its solid height. Fewer coils produce a stiffer spring with higher torque output per degree. If you need a softer return with more travel, choose 7–9 coils; for a firm, snappy return over a short angle, choose 3–4 coils.
The leg angle is the angle between the two straight legs of the spring when it is in its free (unloaded) state. Match this to the angle between your two mounting points at rest. Common choices: 90° for right-angle brackets and hinges, 180° for parallel-leg configurations (e.g., clothespin-style clamps), 120° for intermediate pivot mechanisms, and 60° for compact assemblies with a narrow mounting gap.
Standard spring steel offers moderate corrosion resistance suitable for indoor and protected environments. For outdoor, high-humidity, or chemical-exposure applications, consider applying a light coat of corrosion-inhibiting oil after installation, or contact us to confirm whether a coated or stainless variant is available for your size.
Yes, provided you match four parameters: wire diameter (1.5 mm), outer diameter, number of active coils, and leg angle. Also confirm the wind direction — these are left-hand only. If your original spring has a different wire diameter or OD, browse our other torsion spring listings for the correct size.
Each variant is sold in packs of 10 pieces. You can add multiple variants (different OD, coil count, or angle combinations) to your cart in a single order to test several configurations or stock different sizes for a repair kit.
