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When a mechanism fails because a tiny spring snaps or loses tension, the whole project stalls. Engineers, hobbyists, and repair technicians who work with compact assemblies — clocks, hinges, latches, sensors, and small appliances — need torsion springs they can spec with confidence. These miniature torsion springs are wound from spring steel wire and are available in a wide matrix of sizes and angles so you can match the exact geometry your design demands.
Each pack contains 10 springs wound from 1.0 mm spring steel wire. Outer diameters span 5 mm to 12 mm (approximately 0.20 in to 0.47 in), with coil counts of 3, 6, or 9 turns. Torsion angles are available in 60°, 90°, 120°, and 180°, and each size is offered in both left-hand and right-hand wind directions.
Typical applications include miniature door and lid hinges requiring a 90° return force, precision instrument latches where a 60° or 120° pre-load is needed, and compact robotics or automation linkages that call for a consistent 180° torsion spring with a small OD footprint.
| Wire Diameter | 1.0 mm (0.039 in) |
|---|---|
| Outer Diameter Range | 5 mm – 12 mm (0.20 in – 0.47 in) |
| Coil Count Options | 3 Coil / 6 Coil / 9 Coil |
| Torsion Angle Options | 60° / 90° / 120° / 180° |
| Wind Direction | Left spring / Right spring |
| Material | Spring steel |
| Finish | See variant options |
| Inner Diameter | See variant options |
| Free Leg Length | See variant options |
| Quantity per Pack | 10 pieces |
| Torque Rating | See variant options |
Match the outer diameter (OD) to the bore or housing your spring sits in, leaving a small clearance. The coil count affects angular stiffness — more coils (e.g., 9 coils) produce a softer spring with greater angular travel before reaching the rated torque, while fewer coils (3 coils) give a stiffer response over a shorter deflection range. If you need a gentle return force over a wide angle, choose a higher coil count.
The wind direction determines which way the spring tightens under load. A right-hand (right spring) torsion spring winds clockwise when viewed from the front; a left-hand (left spring) winds counter-clockwise. To select correctly, identify the direction your mechanism rotates to apply the load — the spring should wind tighter in that direction. Using the wrong hand will cause the spring to unwind and lose tension.
Torque capacity depends on the specific OD, coil count, and deflection angle you select. Spring steel wire at 1.0 mm diameter is suited to light-duty precision applications such as instrument latches, small hinges, and sensor mechanisms. For exact torque values, refer to standard spring steel torsion spring torque tables using wire dia 1.0 mm and your chosen OD, or contact us to confirm suitability for your load requirement.
Spring steel offers good mechanical properties but has limited inherent corrosion resistance compared to stainless steel. For indoor, dry, or low-humidity environments these springs perform reliably. If your application involves moisture, chemicals, or outdoor exposure, consider applying a light protective coating after installation, or contact us to discuss stainless steel alternatives.
These miniature torsion springs are compatible with any assembly that accepts a spring with OD 5–12 mm and wire dia 1.0 mm. Common uses include small cabinet and lid hinges, precision instrument latches, clock and timer mechanisms, robotics linkages, toy mechanisms, and compact electrical switch returns. Always verify the inner diameter clears your mounting shaft before ordering.
The torsion angle is the pre-wound angle between the two legs of the spring. Choose the angle that matches the angular travel your mechanism needs to return to its rest position. For example, a lid that opens 90° and must snap back needs a 90° spring. A latch that sweeps 180° needs a 180° spring. If your required angle falls between options, select the next larger angle and adjust the leg position during installation.
These springs are sold in packs of 10 pieces per variant. This pack format is ideal for prototyping, repair stock, or small-batch production where having spares on hand saves time. If you need a different quantity, please contact us and we will do our best to accommodate your requirement.
