Product Description

Our custom small long arm torsion spring is one-piece CNC wire formed torsion hardware with integrated locating ring and extended bent legs, also named clip reset torsion spring & lid catch torsion spring. Manufactured via full digital spring coiling & bending process from premium carbon spring steel wire. After stress relieving tempering, parts go through alkaline high-temperature black oxide coating plus sealing oil to form uniform matte black anti-corrosion surface. Every custom small bent leg torsion spring is fully inspected on torque, torsion angle, wire diameter, outer coil diameter and arm bending tolerance before delivery. As a reliable OEM manufacturer, we accept fully personalized custom service to match unique mechanical assembly reset, locking and latching functional demands for small machinery, plastic enclosures, pedal components and snap clip structures.

Technical Specification

Applications

• Plastic box lid catch & locking mechanism (lid catch torsion spring)
• Small equipment pedal reset return parts (clip reset torsion spring)
• Household appliance snap clip & latch fastener assemblies
• Office hardware locking & reset torsion components
• Electronic enclosure small locking clip structures
• Light-duty mechanical reset & positioning torsion assemblies

Custom Services

• OEM & ODM custom service: Process custom small long arm torsion spring per customer technical drawings or physical samples.
• Material customization: Alternative stainless spring steel, alloy spring steel on demand.
• Size customization: Adjustable wire diameter, coil OD, coil turns, long arm length & bending angle.
• Surface finish customization: Black oxide, zinc plating, nickel plating, passivation options.
• Performance customization: Tunable torsion torque & working rotation angle for specific assembly loads.
• Packaging customization: Neutral export carton, branded customer packaging support.

Product Advantages

• One-piece CNC forming avoids split assembly failure of ordinary torsion springs; integrated locating ring eliminates loose shifting during operation.
• Stress relief tempering solves early breakage & fatigue cracking points of untreated torsion springs under repeated cycling.
• Uniform black oxide coating provides stable rust resistance, resolving short service life from bare metal oxidation.
• Strict ±0.02mm dimensional tolerance matches precision assembly, eliminating fit gap & installation stuck issues.
• Customizable long bent arm length & hook angle to fit unique equipment mounting space, no secondary bending modification needed.
• Full torque & angle inspection guarantees consistent torsion force batch-to-batch, avoiding unstable locking/reset performance.

Quality Control

• Raw material incoming inspection: Hardness, wire roundness & surface defect test for carbon steel wire.
• In-process QC: Real-time dimension monitoring during CNC coiling & arm bending.
• Heat treatment verification: Hardness test after stress relief tempering to eliminate internal stress.
• Surface finish inspection: Uniform black oxide coating coverage & sealing oil adhesion check.
• Finished product full inspection: Torque force test, torsion angle test, all dimensional measurement, visual defect sorting.
• Batch sampling aging cycle test to verify long-term fatigue service life.
• Complete test records provided for bulk OEM orders upon request.

FAQ

• Can you manufacture custom small bent leg torsion spring based on my samples or technical drawings?

  Yes, we offer full OEM custom service, accept both physical sample replication and drawing specification production.

• What surface finish options do you provide besides black oxide for small long arm torsion spring?

  We support zinc plating, nickel plating and stainless steel passivation as alternative anti-rust treatments.

• What is the minimum order quantity for custom clip reset torsion spring?

  Small trial orders are acceptable for prototype testing, mass production MOQ negotiable for long-term OEM clients.

• How do you guarantee consistent torsion performance of lid catch torsion spring?

  All finished springs undergo 100% torque & torsion angle inspection to ensure batch performance consistency.

• What lead time can I expect for custom torsion spring bulk orders?

  Prototype samples take 3-5 working days, mass production orders deliver within 7-15 working days based on order volume.