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When a standard spring just won't do, engineers and DIY builders alike need a torsion spring that delivers consistent rotational force with exact geometry. These left-hand wound torsion springs are designed for applications where clockwise torque return is required — from hinged panels and door mechanisms to precision instruments and custom machinery.
Each spring is formed from 1.5 mm wire diameter steel, with outer diameters ranging from 8 mm to 16 mm (approximately 0.31 in to 0.63 in). Coil counts span 3 to 9 turns, and leg angles are available in 60°, 90°, 120°, and 180° to match your specific deflection requirement. Material is spring steel with a natural (uncoated) finish unless otherwise noted in the variant listing.
Typical use cases include left-hand torsion spring for cabinet hinges, torsion spring replacement for garage door mechanisms (light-duty), custom torsion spring for robotics and automation fixtures, and DIY torsion spring for clock or timer mechanisms requiring precise angular return force.
Wound counter-clockwise for applications requiring clockwise torque return. Confirm your mechanism's rotation direction before selecting.
Available in 60°, 90°, 120°, and 180° leg configurations to match your deflection geometry without custom fabrication.
Choose from 3 to 9 active coils — more coils provide softer spring rates; fewer coils deliver stiffer torque response.
1.5 mm wire diameter with outer diameters from 8 mm to 16 mm (0.31–0.63 in), enabling accurate shaft-fit calculations.
Formed from spring steel for reliable elastic memory and consistent torque delivery across repeated deflection cycles.
Standardized dimensions make these suitable as direct replacements in hinges, latches, and light mechanical assemblies.
| Wire Diameter | 1.5 mm (0.059 in) |
|---|---|
| Outer Diameter (Øa) | 8–16 mm (0.31–0.63 in) |
| Inner Diameter (ID) | OD − 3 mm (varies by variant) |
| Number of Coils | 3, 4, 5, 6, 7, 8, or 9 coils |
| Leg Angle | 60°, 90°, 120°, or 180° |
| Wind Direction | Left-hand (counter-clockwise) |
| Material | Spring steel |
| Surface Finish | See variant options |
| Spring Rate | See variant options |
| Max Torque | See variant options |
Measure the shaft or mandrel your spring will wrap around. The spring's inner diameter (ID) should be slightly larger than the shaft diameter to allow free rotation. ID = Outer Diameter − (2 × Wire Diameter). For example, a 1.5 × 10 mm variant has an ID of approximately 7 mm.
Left-hand (LH) wound springs are coiled counter-clockwise when viewed from the top. They are designed to tighten (store energy) when rotated clockwise. If your mechanism rotates counter-clockwise to load the spring, you need a right-hand wound spring instead.
More active coils result in a lower spring rate (softer, more deflection per unit of torque). Fewer coils produce a stiffer spring rate. If you need a gentler return force, choose a higher coil count; for a snappier return, choose fewer coils.
The leg angle refers to the angular position of the two legs relative to each other. Choose the angle that matches the geometry of your application at rest (unloaded position). Common choices: 90° for right-angle brackets, 180° for straight-line mechanisms, 60° or 120° for angled assemblies.
These springs are made from spring steel with a natural finish. They are suitable for dry indoor environments. For outdoor or humid applications, consider applying a light protective coating or contact us to confirm if a coated variant is available for your size.
Yes, provided you match the wire diameter (1.5 mm), outer diameter, coil count, leg angle, and wind direction of the original spring. Measure the original spring carefully or refer to its part number before selecting a replacement variant.
A torsion spring stores energy through angular deflection (twisting), delivering rotational torque. A tension spring stores energy through linear extension, delivering a pulling force. Torsion springs are used in hinges, latches, and rotating mechanisms; tension springs are used in hooks and extension assemblies.
