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When a worn-out torsion spring causes a cabinet door to sag, a mechanism to bind, or a hinge to lose its return force, finding the exact replacement geometry is the real challenge. These 2.5mm wire diameter torsion springs are engineered for makers, maintenance technicians, and engineers who need a specific wire diameter, outer diameter, coil count, angle, and winding direction — all available in a single configurable listing.
Each spring is formed from Federstahl (spring steel), a carbon-steel alloy selected for its high elastic limit and fatigue resistance. Wire diameter is 2.5 mm (approx. 0.098 in). Outer diameter ranges from 12 mm to 30 mm (approx. 0.47 in to 1.18 in), with coil counts of 3, 6, or 9 turns. Leg angles are available in 60°, 90°, 120°, and 180°. Both left-hand (Linke Federn) and right-hand (Rechte Federn) winding directions are stocked.
Typical use cases include torsion spring replacement for cabinet hinges and door-return mechanisms, custom jig and fixture assemblies requiring a defined return torque, and light-duty industrial automation components where a compact coil spring with a precise leg angle is required. Long-tail applications include 2.5mm wire torsion spring for cabinet hinge, small torsion spring 12mm OD 90 degree, and left-hand torsion spring spring steel 30mm OD.
Made from Federstahl (carbon spring steel) for a high elastic limit, consistent return force, and long fatigue life under repeated deflection cycles.
Outer diameters from 12 mm to 30 mm (0.47"–1.18"), coil counts of 3, 6, or 9 turns — covering a broad range of torque and space requirements in a single listing.
Choose 60°, 90°, 120°, or 180° leg geometry to match your mechanism's required deflection angle and mounting configuration.
Both Linke Federn (left-hand) and Rechte Federn (right-hand) winding directions available — critical for correct torque direction in your assembly.
Spring steel surface provides inherent resistance to light oxidation in dry indoor environments. For humid or outdoor use, consider additional protective coating after installation.
Each spring is wound to consistent OD, wire diameter, and coil count tolerances, ensuring repeatable fit and torque characteristics across replacement sets.
| Wire Diameter | 2.5 mm (approx. 0.098 in) |
|---|---|
| Outer Diameter (OD) | 12 mm – 30 mm (approx. 0.47 in – 1.18 in) — See variant options |
| Coil Count | 3, 6, or 9 coils — See variant options |
| Leg Angle | 60°, 90°, 120°, or 180° — See variant options |
| Winding Direction | Left-hand (Linke Federn) / Right-hand (Rechte Federn) — See variant options |
| Material | Federstahl (Carbon Spring Steel) |
| Finish | Natural spring steel |
| Inner Diameter (ID) | OD − 2 × 2.5 mm — See variant options |
| Spring Type | Torsion / Leg Spring (Schenkelfeder) |
| Application | Hinges, door returns, jigs, light industrial mechanisms |
Measure the mandrel or shaft your spring will coil around. The spring's inner diameter (ID = OD − 2 × wire diameter) should be slightly larger than the shaft diameter to allow free rotation. For a 2.5 mm wire spring, subtract 5 mm from the listed OD to get the approximate ID. Select the OD that gives you 0.5–1 mm clearance over your shaft.
Winding direction determines which way the spring tightens when torque is applied. A left-hand (Linke Federn) spring tightens when rotated counterclockwise; a right-hand (Rechte Federn) spring tightens clockwise. Using the wrong winding direction will cause the spring to unwind rather than store energy. Always match the winding direction to your mechanism's rotation.
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 neutral position. For example, a 90° spring is common for right-angle door returns, while a 180° spring suits applications where both legs point in opposite directions. If your application requires a different angle, choose the closest available option and note that the spring will exert torque proportional to the deflection from its free angle.
More coils (turns) result in a lower spring rate (softer spring) for the same wire diameter and OD, meaning the spring deflects more per unit of torque. Fewer coils produce a stiffer spring with higher torque per degree of deflection. Choose 3 coils for a stiffer, more compact spring; 9 coils for a softer, longer spring body with more angular travel before reaching the same torque level.
Carbon spring steel (Federstahl) has moderate corrosion resistance and performs well in dry indoor environments. In humid, wet, or outdoor conditions, surface rust can develop over time. For such applications, consider applying a protective coating (e.g., oil, lacquer, or zinc spray) after installation, or contact us to discuss stainless steel alternatives if available.
Before ordering, measure your existing spring or the space available: (1) wire diameter — should be 2.5 mm; (2) outer diameter — select the matching OD variant; (3) coil count — count the full turns; (4) leg angle — measure the angle between the legs in the free state; (5) winding direction — observe which way the coil winds. All five parameters must match for a direct replacement.
Yes. These springs are widely used in custom jigs, fixtures, and mechanisms. Use the OD, coil count, and leg angle selectors to configure a spring that meets your torque and geometry requirements. If you need help calculating the approximate spring rate or torque for a specific variant, feel free to contact us with your application details.
