Our custom mini center coil torsion spring is a precision micro torsion spring featuring a central main coil body paired with dual flat short straight insert legs, also known as small clip return torsion spring. It is fully one-piece formed by CNC spring machine from premium 304 stainless steel wire without extra extended outer arms. After wire straightening, cutting and integrated coiling & bending, each piece undergoes low-temperature stress relief tempering to eliminate internal forming stress and avoid fatigue breakage during repeated rotation cycles. The surface adopts electro-polishing plus passivation treatment to achieve bright smooth finish and excellent rust resistance for long-term service in humid environments. As a reliable OEM manufacturer with full custom service, we produce tailored short straight leg torsion spring with adjustable coil turns, wire diameter, outer coil diameter and leg length, all finished products receive 100% full inspection covering torsion torque, rotation angle and dimensional tolerance to meet strict compact equipment assembly requirements.

• Mini plastic box small clip return locking components (small clip return torsion spring)
• Tiny electronic device compact latching & reset mechanisms
• Household miniature switch rebound positioning assemblies
• Medical lightweight precision miniature fixture torsion parts
• Office small stationery snap & reset hardware
• Micro automation equipment compact positioning torsion assemblies

• OEM & ODM full custom service: Manufacture precision micro torsion spring per customer technical drawings or physical samples.
• Material customization: Alternative 316 stainless steel, alloy spring steel for special corrosion-resistance demands.
• Structural customization: Adjustable wire diameter, coil outer diameter, coil quantity, short straight leg length & insertion angle.
• Surface finish customization: Electro-polishing, passivation, nickel plating, zinc plating options.
• Performance customization: Tunable torsion torque and maximum working rotation angle for compact assembly load requirements.
• Packaging customization: Neutral export cartons, customer branded printed packaging available for bulk OEM orders.

• Central center coil torsion design with short straight legs fits ultra-narrow compact installation space, solving mounting space limitation points of long-arm torsion springs.
• 304 stainless steel + electro-polished passivation surface eliminates rust failure under humid working conditions, extending service life.
• Low-temperature stress relief tempering removes internal forming stress, avoiding early fatigue cracking and breakage after frequent cyclic use.
• CNC one-piece integrated forming ensures consistent leg flatness & coil concentricity, preventing installation jamming and uneven torsion force.
• Strict ±0.015mm high precision dimensional tolerance matches miniature assembly tight fit standards, no secondary trimming needed for short insert legs.
• 100% full torque & angle inspection ensures stable batch torsion output, solving inconsistent clip return & latching performance issues.

1. Raw material incoming QC: Hardness, wire roundness and surface scratch inspection for 304 stainless steel wire.
2. In-process real-time monitoring: Dimension tracking during CNC coiling and short leg bending forming.
3. Heat treatment verification: Stress test after low-temperature tempering to confirm internal stress elimination.
4. Surface finish inspection: Uniform electro-polishing brightness and complete passivation anti-corrosion layer coverage check.
5. Finished goods full inspection: Torsion torque test, rotation angle test, full dimension measurement and visual surface defect sorting.
6. Accelerated cycle aging test for batch sampling to verify long-term fatigue resistance.
7. Complete production & inspection test reports provided upon request for mass OEM custom orders.

Can you provide custom precision micro torsion spring based on my samples or technical drawings?

Yes, we supply complete OEM custom service, both sample replication and drawing specification production are supported.

What anti-corrosion surface treatments are available for mini center coil torsion spring?

We offer electro-polishing + passivation, nickel plating and zinc plating as optional finishes for 304 stainless steel torsion spring.

What is the minimum order quantity for custom short straight leg torsion spring prototypes?

Small trial prototype orders are acceptable, MOQ for mass OEM production can be negotiated for long-term cooperative clients.

How do you guarantee stable torsion performance of small clip return torsion spring in mass batches?

All finished springs go through 100% torque and rotation angle testing to keep consistent torsion force across batches.

What production lead time can I get for bulk custom torsion spring orders?

Prototype samples take 3–5 working days; mass production orders are delivered within 7–14 working days according to order quantity.