As a reliable custom torsion spring manufacturer with full OEM custom service, we produce premium stainless steel double leg torsion spring crafted from grade 304 stainless steel wire. This small precision rotational torsion spring features two different-length torque arms, engineered to deliver consistent rotational torque for daily hardware, cabinet hinges, automation fittings and plastic buckle assemblies.
Our full manufacturing workflow includes CNC numerical spring coiling, low-temperature stress relief tempering, wire end deburring, ultrasonic degreasing, mechanical mirror polishing and stainless steel passivation treatment. Every stainless steel hinge torsion spring undergoes strict full inspection to guarantee consistent size tolerance, stable torsion force and long anti-fatigue service life. We accept custom drawings and sample-based production to match unique equipment assembly requirements for global industrial buyers.

Product name

Double Leg Torsion Spring

Base Material

304 Stainless Steel Wire

Wire Diameter

0.8mm

Coil Turns

10 full coils

Outer Coil Diameter

5.8mm

Torque Arm Lengths

13mm & 10mm (customizable)

Surface Treatment

Mechanical mirror bright polishing + stainless steel passivation anti-corrosion finish

Machining Tolerance

±0.02mm for dimension, ±5% tolerance for torsion force

Processing Technology

CNC integrated coiling & arm bending, low-temperature stress relief tempering, end chamfer deburring, ultrasonic cleaning, polishing, passivation

Rotation Feature

Bidirectional rotational torque, anti-fatigue repeated twisting performance

This stainless steel double leg torsion spring (stainless steel hinge torsion spring) widely fits civilian & light industrial assemblies:

• Cabinet, door & furniture hinge hardware
• Small automation equipment rotational buckles & latches
• Plastic household appliance rotating connecting parts
• Electronic device internal rotating clamping structures
• Stationery, cosmetic packaging opening & closing rotating components
• Medical light equipment non-corrosive rotating fittings
• Toy rotating hinge and reset mechanism parts

Our factory provides one-stop OEM custom service as a professional custom torsion spring manufacturer:

• Custom torsion spring production based on customer technical drawings, hand samples or parameter requirements
• Flexible customization of wire diameter, coil turns, outer diameter, torque arm length & arm angle
• Optional raw material upgrade: 316 stainless steel, spring steel upon request
• Multiple surface finish options: mirror polishing, matte polishing, passivation
• Custom packaging, private label marking for bulk OEM orders
• Free pre-production prototype trial before mass manufacturing
• Flexible MOQ support for small batch & large volume orders

• Low-temperature tempering eliminates internal forming stress: Solves unstable torsion force and easy deformation issues of ordinary small precision rotational torsion spring after repeated rotation
• Mirror polishing + passivation double surface process: Fixes scratch, rust and corrosion problems of untreated stainless steel double leg torsion spring in humid working environments
• Precision CNC integrated molding: Avoids uneven coil spacing and inconsistent arm size tolerance of manually bent torsion springs
• Full wire end chamfer deburring: Eliminates sharp burr scratch risks during assembly
• Strict torsion force full inspection: Resolves batch torque inconsistency which causes hinge reset failure
• 304 stainless steel raw material: Prevents rust failure for stainless steel hinge torsion spring used in damp daily & light industrial equipment

• Raw material incoming inspection: Chemical composition & wire hardness test for 304 stainless steel wire
• In-process dimensional spot check during CNC coiling & arm bending
• Low-temperature tempering stress uniformity monitoring
• Ultrasonic cleaning cleanliness verification to remove processing oil residue
• Mirror polishing surface gloss & scratch visual inspection
• Passivation anti-corrosion layer thickness test
• Final full inspection: All finished products test dimension tolerance, torsion force, surface appearance, burr removal
• Finished product aging torsion cycle test to verify anti-fatigue performance