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When a mechanism fails because a torsion spring loses its tension or snaps under load, finding an exact replacement with the right wire diameter, outer diameter, coil count, and leg angle can be a frustrating search. Engineers, repair technicians, and hands-on DIYers who need a reliable, dimensionally accurate left-hand torsion spring in a practical pack size will find this listing covers a wide matrix of configurations in one place.
Each pack contains 10 pieces of left-hand wound torsion springs manufactured from spring steel. Wire diameter is 1.6 mm (0.063 in). Outer diameter (OD) ranges from 8 mm to 18 mm (0.31 in to 0.71 in) depending on the variant selected. Coil counts span 3 to 9 active coils, and leg angles are available in 60°, 90°, 120°, and 180°, giving you precise control over the torque arm geometry.
Typical use cases include replacement torsion springs for cabinet hinges and door mechanisms, custom jig and fixture assemblies requiring left-hand torque bias, robotics and automation components where directional spring force is critical, and general mechanical repair where a specific OD-to-wire-diameter ratio must be maintained.
Made from spring steel for consistent elastic return, fatigue resistance, and reliable torque delivery across repeated deflection cycles.
Wire dia 1.6 mm, OD 8–18 mm, 3–9 active coils, and 4 leg angles (60°/90°/120°/180°) — select the exact configuration your application demands.
Counterclockwise coil winding provides the correct torque direction for left-hand spring applications, preventing binding or reverse-loading issues.
Each order ships as a pack of 10 identical springs, ideal for batch repairs, prototyping runs, or keeping spares on hand for maintenance.
Four leg angle options — 60°, 90°, 120°, and 180° — allow accurate torque arm positioning to match your mechanical design without bending or modifying legs.
Coil counts from 3 to 9 let you tune spring rate and deflection range: fewer coils for stiffer response, more coils for greater angular travel at lower torque.
| Wind Direction | Left-hand (counterclockwise) |
|---|---|
| Wire Diameter | 1.6 mm (0.063 in) |
| Outer Diameter (OD) | 8 mm – 18 mm (0.31 in – 0.71 in) — See variant options |
| Number of Active Coils | 3 – 9 Coils — See variant options |
| Leg Angle | 60° / 90° / 120° / 180° — See variant options |
| Material | Spring Steel |
| Surface Finish | See variant options |
| Pack Quantity | 10 pieces per pack |
| Inner Diameter (ID) | See variant options (OD minus 2× wire dia) |
| Free Leg Length | See variant options |
| Spring Rate | See variant options |
Measure the mandrel or shaft diameter your spring will wrap around, then select an OD that provides a small clearance fit — typically 0.5–1 mm larger than the shaft. For housing fits, measure the bore and select an OD that fits inside with minimal play. This listing offers OD options from 8 mm to 18 mm in the variant selector above.
A left-hand (LH) wound torsion spring coils counterclockwise when viewed from the leg end. To check your existing spring, hold it vertically and look at the coil direction from the top — if it spirals counterclockwise (like a standard left-hand thread), it is LH wound. If your application loads the spring by rotating the leg clockwise, you need a left-hand spring.
More active coils result in a lower spring rate (softer, more angular travel per unit of torque) and greater total deflection capacity. Fewer coils produce a stiffer spring with less angular travel. If you are replacing an existing spring, match the coil count exactly. If designing from scratch, select coil count based on your required torque and deflection angle.
The leg angle is the angle between the two straight legs of the spring in its free (unloaded) state. Select the angle that matches your mechanism's geometry so the legs align with your mounting points without pre-stressing the spring. A 90° spring is common for right-angle bracket mounts; 180° suits parallel-leg configurations such as door hinges. Measure your existing spring or consult your design drawing.
Spring steel provides excellent mechanical properties but has moderate corrosion resistance in its bare state. For outdoor or humid environments, consider applying a light coat of corrosion-inhibiting oil or grease, or use the spring in a protected housing. If your application requires extended exposure to moisture or chemicals, contact us to confirm suitability before ordering.
These torsion springs are suitable for a broad range of applications including cabinet hardware, door mechanisms, jigs, fixtures, robotics, and light mechanical assemblies. For heavy industrial or safety-critical applications, verify the spring rate and fatigue life against your load requirements. Contact us to confirm if you have specific load or cycle-life specifications.
The inner diameter equals the outer diameter minus twice the wire diameter. For example, a 1.6 mm wire spring with 10 mm OD has an ID of approximately 6.8 mm (10 − 2 × 1.6). Use this formula to verify shaft clearance for your specific variant. Exact ID values are available on request.
