Custom Shaped Torsion Spring 304 Double Arm Clip Torsion Spring Appliance Lid

Our custom shaped torsion spring, also named double arm clip torsion spring and appliance lid torsion spring, is a precision CNC coiled torsion component widely used for household electrical hinges and switch snap structures. Constructed from high ductility 304 stainless steel spring wire, this rice cooker hinge spring consists of a central 4-coil torsion core paired with two irregular Z-type bending arms, fully formed by automatic CNC spring machines in integrated coiling and bending steps.
The full production workflow eliminates internal stress thoroughly: raw wire straightening removes initial bending stress, tumble deburring clears sharp edges on coils and arm bends, then low-temperature stress relief tempering locks stable torsion force and extends cycle fatigue life. Final stainless steel passivation surface treatment greatly enhances anti-rust and anti-oxidation performance against humid kitchen environments.
As an experienced OEM manufacturer with full custom service, we adjust wire diameter, coil count, arm length, bending angle and torsion force per client’s design. Every batch of 304 stainless steel torsion spring undergoes 100% dimensional measurement and torsion testing before delivery.

• Rice cooker lid hinge components (rice cooker hinge spring)
• Small home appliance flip lid & pop-up cover (appliance lid torsion spring)
• Electronic plastic shell pop switches & clip buckles (double arm clip torsion spring)
• Small beauty equipment flip brackets and locking structures
• Smart home sensor clamping & rebound torsion parts
• Small kitchen appliance lid rebound positioning torsion springs

As a professional OEM manufacturer of custom shaped torsion spring, we supply all-round custom service for 304 stainless steel torsion spring products:

• Custom production based on client engineering drawings, sketches or physical samples
• Adjustable wire diameter, coil quantity, coil inner/outer diameter, arm length & bending angle
• Custom torsion force output to match your equipment’s rebound demand
• Optional surface finish: stainless steel passivation, electrolytic polishing
• Small batch prototype trial production & mass bulk manufacturing support
• Technical optimization for torsion arm structure to reduce assembly defective rate

• CNC integrated coiling & bending forming: Eliminates secondary welding deformation, fixes inconsistent torsion force of manual segmented processing
• Low-temperature stress relief tempering: Avoids torsion force attenuation after long-term use, solves spring fatigue and lid sagging issues
• Precision ±0.02mm tolerance: Uniform arm size for seamless assembly, reduces manual adjustment cost during production
• 304 stainless steel + dedicated passivation: Resists sweat, steam and kitchen humidity, solves rust failure of ordinary carbon steel springs
• Custom shaped torsion spring service: Modify arm shape and torsion torque to fit exclusive product molds, no universal size limitation
• Full deburring treatment: No sharp edges, prevents scratching plastic housing and assembly workers’ hands

• Raw material incoming inspection: Hardness, tensile strength & surface defect test for 304 stainless steel wire
• First article inspection after CNC coiling & bending: Full measurement of coil size, arm length and bending angle
• Intermediate inspection after deburring & tempering: Burr elimination check & preliminary torsion force test
• Final full inspection: 100% dimensional sorting + torsion force calibration for each 304 stainless steel torsion spring
• Anti-corrosion salt spray test for passivation surface treatment
• Random fatigue cycle sampling test to verify long service life
• Complete batch production quality records for all custom shaped torsion spring orders