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When a mechanism fails because a spring loses tension, snaps under load, or simply doesn't fit the required geometry, the entire assembly stops working. Engineers, machinists, and serious DIYers who need reliable left-hand wound torsion springs with exact coil counts and leg angles know how difficult it is to source the right spec without ordering custom. This pack of 10 left-hand torsion springs in spring steel gives you the dimensional precision to match your application without compromise.
Each spring is wound from 2.5mm diameter spring steel wire with outer diameters ranging from 12mm (0.47 in) to 30mm (1.18 in) depending on the variant selected. Coil counts span 3 to 9 turns, and leg angles are available in 60°, 90°, 120°, and 180° configurations. The left-hand wind direction means the spring tightens when rotated clockwise — critical for applications where the rotation direction matters for torque delivery.
These torsion springs are suited for garage door counterbalance mechanisms, automotive hood and trunk lid assemblies, industrial equipment latches, and custom jig or fixture designs where a specific torque arm angle is required. The multi-variant format makes them practical for prototyping, repair stock, and small-batch production runs.
Consistent wire diameter across all variants ensures predictable torque output and fatigue resistance under repeated cycling.
OD range from 12mm to 30mm (0.47–1.18 in) covers a wide span of shaft and housing sizes in a single product family.
Tightens under clockwise rotation — essential for mechanisms where torque direction determines spring engagement.
More coils increase angular deflection capacity and reduce spring rate; fewer coils deliver stiffer, higher-torque response.
Choose 60°, 90°, 120°, or 180° leg angles to match your mounting geometry without bending or modifying the spring.
Each order includes 10 identical springs — practical for prototyping, repair inventory, or small production batches.
| Wire Diameter | 2.5 mm (0.098 in) |
|---|---|
| Outer Diameter (OD) | 12 mm – 30 mm (0.47 – 1.18 in) — See variant options |
| Number of Coils | 3 – 9 coils — See variant options |
| Leg Angle | 60° / 90° / 120° / 180° — See variant options |
| Wind Direction | Left-hand (clockwise tightening) |
| Material | Spring steel |
| Surface Finish | See variant options |
| Quantity per Pack | 10 pieces |
| Spring Rate | See variant options |
| Free Angle | See variant options |
Measure the shaft or mandrel the spring will sit on, then select an OD that provides a small clearance — typically 0.5–1mm larger than the shaft diameter. If the spring must fit inside a housing, ensure the OD is smaller than the bore. Available ODs in this range are 12, 14, 15, 16, 18, 20, 25, and 30mm.
A left-hand wound torsion spring tightens (winds up) when its body is rotated clockwise when viewed from the right end. If your mechanism applies torque in the clockwise direction and you need the spring to resist or store that energy, a left-hand spring is correct. If your mechanism rotates counter-clockwise, you need a right-hand spring instead.
A higher coil count (e.g., 9 coils) lowers the spring rate, meaning the spring deflects more per unit of applied torque — useful when you need a softer, longer-travel response. Fewer coils (e.g., 3 coils) produce a stiffer spring with higher torque per degree of deflection. Match the coil count to your required torque and angular travel specifications.
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 mounting geometry so the legs align with your anchor points without pre-stressing the spring during assembly. Common choices: 90° for perpendicular mounts, 180° for parallel legs, 60° or 120° for angled brackets.
Standard spring steel has moderate corrosion resistance. For outdoor or high-humidity environments, consider applying a light coating of corrosion-inhibiting oil or grease after installation. If the application demands long-term outdoor exposure, contact us to confirm whether a coated or stainless variant is available for your size.
Torsion springs in this size range (2.5mm wire, 12–30mm OD) are typically suited for light-duty counterbalance applications such as small cabinet doors, lightweight hatches, or custom fixtures — not standard residential garage doors, which require much larger wire diameters and ODs. Verify the torque requirements of your specific door or panel before selecting a spring.
Yes. Each pack contains 10 springs of the exact same specification — same OD, wire diameter, coil count, leg angle, and wind direction. Select your required combination from the variant options above before adding to cart.
