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When a hinge won't return, a lid won't close, or a mechanism loses its snap, the culprit is almost always a worn or incorrectly sized torsion spring. Whether you're a hobbyist repairing a tool, a maker building a custom assembly, or a technician replacing a worn component, finding the exact wire diameter, outer diameter, coil count, and leg angle in one listing saves hours of searching. This pack of 10 right-hand torsion springs with 0.7mm wire diameter is designed for that exact scenario.
Each spring is wound from 0.7mm (approximately 0.028 in) round wire with outer diameters ranging from 4mm to 8mm (approximately 0.16 in to 0.31 in) depending on the variant selected. Coil counts span 3 to 9 coils, and leg angles are available in 60°, 90°, 120°, and 180° to suit a wide range of mounting configurations. The springs are right-hand wound, meaning the coil tightens when rotated clockwise when viewed from the leg end.
Typical use cases include small appliance hinges requiring a torsion spring for lid return, DIY robotics and automation projects needing precise rotational preload, and custom jig or fixture assemblies where a compact right-hand torsion spring with a specific leg angle is critical for repeatable positioning.
| Wire Diameter | 0.7 mm (approx. 0.028 in) |
|---|---|
| Outer Diameter (OD) | 4 mm – 8 mm (approx. 0.16 in – 0.31 in) — See variant options |
| Number of Coils | 3 – 9 Coils — See variant options |
| Leg Angle | 60°, 90°, 120°, or 180° — See variant options |
| Wind Direction | Right-hand (clockwise) |
| Material | Contact us to confirm |
| Finish / Coating | Contact us to confirm |
| Quantity per Pack | 10 pieces |
| Spring Rate | See variant options |
| Free Angle | See variant options |
The outer diameter (OD) of the torsion spring should be slightly smaller than the bore or housing it sits in, or it should match the shaft diameter it wraps around. Measure the shaft or bore with calipers, then select the OD variant closest to your measurement. For shaft-mounted springs, the inner diameter (OD minus 2× wire diameter) should clear the shaft with minimal play.
The leg angle is the angle between the two straight legs of the torsion spring when it is in its free (unloaded) state. A 90° spring has legs perpendicular to each other; a 180° spring has legs pointing in opposite directions. Choose the angle that matches your mechanism's geometry in its resting position so the spring applies force in the correct direction when deflected.
More coils generally means a lower spring rate (softer spring) for the same wire diameter and OD, because the additional coil length distributes the stress over a greater active length. If you need more angular travel before reaching your target torque, choose a higher coil count. If you need higher torque at a given deflection angle, choose fewer coils.
The surface finish and material of these springs should be confirmed before use in wet or corrosive environments. Please contact us to confirm the material specification and any available coating options if your application involves moisture, chemicals, or outdoor exposure.
A right-hand wound torsion spring coils in a clockwise direction when viewed from the leg end. When the spring is deflected by rotating the leg clockwise (tightening the coil), it stores energy and returns the leg when released. If your mechanism requires the spring to be wound in the opposite direction, you would need a left-hand wound spring instead. Check your existing spring or mechanism drawing to confirm the required wind direction.
Yes. Torsion springs with 0.7mm wire and 4–8mm OD are well suited for small hinges, lid return mechanisms, latch assemblies, and light-duty rotational return applications. Select the OD that fits your hinge pin diameter, the leg angle that matches your hinge geometry, and the coil count that provides the desired closing force.
Torsion springs are small and easy to lose during installation. Having 10 per pack means you have spares for prototyping iterations, replacements if a spring is over-deflected during testing, and extras for multi-unit production runs — all without waiting for a reorder.
