Custom flat wire torsion springs for door lock handle return mechanism. High strength, durable torsion springs, custom size & material available from China spring factory.

Custom flat wire torsion springs for door lock handle return mechanism. High strength, durable torsion springs, custom size & material available from China spring factory.

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Custom Flat Wire Torsion Spring for Door Handle Lock

Flat wire torsion springs, also known as multi-coil torsion springs, are widely used as return springs for door lock handles. When you press down the door handle to open the door, the spring stores torque. Once you release the handle, the torsion spring rebounds automatically to restore the handle to its original position.

Our factory specializes in custom manufacturing all types of flat wire torsion springs. We can produce springs according to your drawings, samples or technical parameters.

Product Features

✅ High fatigue resistance: stable torque, long service life, not easy to break after repeated rotation ✅ Multiple material options: Carbon steel, Stainless steel (304, 316), Alloy steel ✅ Surface treatment: Black oxide, Zinc plating, Powder coating, Oil coating for anti-rust ✅ Customizable structure: Custom coil number, wire thickness, inner diameter, leg angle & leg shape ✅ Strict quality control: 100% torque inspection, dimension check before shipment ✅ Application-oriented design: Designed for continuous cyclic rotation

Specifications (Customizable)

Wire type: Flat wire / Rectangular wire
Wire thickness: Custom from 0.5mm to 6mm
Inner diameter: Custom according to your requirement
Number of coils: Custom multi-coil design
Spring legs: Custom leg length, bending angle and shape
Working temperature: -40℃ ~ +180℃ (depends on material)
MOQ: Small MOQ accepted for prototype & trial order

Main Applications

🔑 Door lock handle / Lever lock return spring (Most popular) 🔑 Hardware rotary reset mechanism 🔑 Equipment flip cover & rotating handle 🔑 Automotive small rotary parts 🔑 Home appliance & power tool rotating components