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When a worn or undersized torsion spring causes a cabinet door to sag, a lid to slam, or a mechanical linkage to lose its return force, finding the right replacement with the exact leg angle and coil count is rarely straightforward. This listing is designed for engineers, maintenance technicians, and serious DIYers who need a torsion spring with a specific geometry — not a generic approximation.
Each spring in this series is wound from 1.8 mm diameter wire with an outer diameter (OD) ranging from 12 mm to 20 mm (approximately 0.47 in to 0.79 in). The body is formed as a right-hand (clockwise) wound coil available in 1, 2, 3, 4, or 5 active coils. Leg angles span 45°, 60°, 90°, 120°, 180°, and 270°, giving you precise control over the torque arm geometry. Material is spring steel, with a natural (uncoated) finish typical of precision-wound torsion springs.
Typical use cases include cabinet and furniture hinges requiring consistent return force, small appliance lids and covers, automotive interior trim clips, electronic enclosure latches, and custom mechanical linkages where a defined rotation angle and compact OD are critical. The 12–20 mm OD range makes these springs well-suited for applications where space is constrained and a standard off-the-shelf spring does not match the required leg angle.
Consistent wire gauge across all variants ensures predictable spring rate and fatigue life for light-to-medium duty cycling applications.
Five OD options (12, 14, 16, 18, 20 mm / 0.47–0.79 in) let you match the spring to your mandrel and housing bore without modification.
Choose from 45°, 60°, 90°, 120°, 180°, or 270° leg angles to match your hinge geometry or return-force arm exactly — no bending required.
Coil count directly affects spring rate and angular deflection capacity. Select 1–5 coils to tune stiffness for your specific torque requirement.
All variants are right-hand wound, the most common orientation for standard hinge and latch applications. Confirm wind direction before ordering for left-hand applications.
Wound from spring steel wire for reliable elastic return, resistance to set under repeated cycling, and suitability across a broad range of indoor mechanical environments.
| Wire Diameter | 1.8 mm (0.071 in) |
|---|---|
| Outer Diameter (OD) | 12 mm, 14 mm, 16 mm, 18 mm, 20 mm (see variant options) |
| Inner Diameter (ID) | See variant options |
| Number of Active Coils | 1, 2, 3, 4, or 5 (see variant options) |
| Leg Angle | 45°, 60°, 90°, 120°, 180°, 270° (see variant options) |
| Wind Direction | Right-hand (clockwise) |
| Material | Spring steel |
| Surface Finish | Natural / uncoated |
| Spring Rate | See variant options |
| Free Leg Length | See variant options |
| Application | Hinges, latches, lids, mechanical linkages, appliance covers |
The outer diameter of the spring must be smaller than the bore of the housing or bracket it sits in, and the inner diameter must be larger than the mandrel or shaft it wraps around. Measure your mandrel diameter first, then select an OD that gives adequate clearance. The five OD options in this listing (12–20 mm) cover a range of compact to mid-size applications.
The leg angle is the angular distance between the two straight legs of the torsion spring when it is in its free (unloaded) state. To measure your existing spring, lay it flat and use a protractor to measure the angle between the two legs. Common angles for cabinet and door hinges are 90° and 180°. If your application requires the spring to be pre-loaded at installation, account for the deflection angle when selecting.
Yes. For a torsion spring with the same wire diameter and OD, increasing the number of active coils decreases the spring rate (makes it softer), while fewer coils increases the spring rate (makes it stiffer). If you need more angular travel for the same torque, choose a higher coil count. If you need more torque for the same deflection, choose fewer coils.
These springs are made from spring steel with a natural uncoated finish, which provides good performance in dry indoor environments. They are not recommended for prolonged exposure to moisture, salt spray, or corrosive chemicals. For outdoor or humid environments, consider a stainless steel or zinc-plated alternative.
No — wind direction matters. A right-hand wound spring tightens (closes) when torque is applied in the clockwise direction (viewed from the right end). If your application requires the spring to tighten in the counter-clockwise direction, you need a left-hand wound spring. All variants in this listing are right-hand wound.
Before ordering, measure and record: (1) the mandrel or shaft diameter the spring will sit on, (2) the housing bore or bracket slot the spring body must fit inside, (3) the required leg angle in the free state, (4) the number of coils of your existing spring, and (5) the wire diameter of your existing spring. Compare these measurements to the variant options in this listing. If you are unsure, contact us to confirm compatibility.
With the same wire diameter and OD, a 1-coil spring is significantly stiffer and has less angular travel capacity than a 5-coil spring. A 1-coil spring is suited for applications needing a strong return force over a small angular deflection. A 5-coil spring is better for applications needing a gentler, more progressive return over a larger angular range.
