Shenzhen TingFeng Hardware Products Co.,Ltd
| Payment Terms | ,T/T |
| Supply Ability | 10000000pieces/per month |
| Delivery Time | 3days/Start |
| Packaging Details | Carton packaging 18*15*12cm (packaging can be customized according to customer product requirements) |
| Product Name | High-Reliability Extension Spring |
| Wire Standard | Compliant with JIS G 3521 / ASTM A227 / EN 10270-1, etc. |
| Precision Grade | P0 (Standard) / P1 (Precision) / P2 (High Precision) / P3 (Extra Precision) |
| Failure Mode Protection | Overload Protection Design / Fatigue Optimization / Corrosion Protection / Installation Stress Prevention |
| End Reinforcement Option | Spot Weld Reinforcement / Nested Bush / Cold Forged Thickening / No Reinforcement |
| Cleanliness Requirement | Industrial Grade / Clean Grade / Cleanroom Grade / Ultrasonic Cleaning |
| Industry Specification | Automotive / Aerospace (Reference) / Medical Device (Reference) / General Industry |
| Quality Documentation | Outgoing Inspection Report / SPC Data / Material Lot Traceability No. |
| Brand Name | TF |
| Model Number | TF-003 |
| Certification | lSO9001 |
| Place of Origin | Shenzhen, China |
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Product Specification
| Payment Terms | ,T/T | Supply Ability | 10000000pieces/per month |
| Delivery Time | 3days/Start | Packaging Details | Carton packaging 18*15*12cm (packaging can be customized according to customer product requirements) |
| Product Name | High-Reliability Extension Spring | Wire Standard | Compliant with JIS G 3521 / ASTM A227 / EN 10270-1, etc. |
| Precision Grade | P0 (Standard) / P1 (Precision) / P2 (High Precision) / P3 (Extra Precision) | Failure Mode Protection | Overload Protection Design / Fatigue Optimization / Corrosion Protection / Installation Stress Prevention |
| End Reinforcement Option | Spot Weld Reinforcement / Nested Bush / Cold Forged Thickening / No Reinforcement | Cleanliness Requirement | Industrial Grade / Clean Grade / Cleanroom Grade / Ultrasonic Cleaning |
| Industry Specification | Automotive / Aerospace (Reference) / Medical Device (Reference) / General Industry | Quality Documentation | Outgoing Inspection Report / SPC Data / Material Lot Traceability No. |
| Brand Name | TF | Model Number | TF-003 |
| Certification | lSO9001 | Place of Origin | Shenzhen, China |
| High Light | Automotive Industry small extension springs ，Corrosion Resistance Precision Extension Springs ，Automotive Industry high compression springs | ||
Zero-Defect Extension Springs | APQP-Managed for Critical High-Reliability Applications
1.Tension Spring Quick Detail
For critical applications, spring reliability is non-negotiable. Tingfeng Hardware specializes in manufacturing high-reliability extension springs. We have built a manufacturing and quality control system aimed at “zero defects”. Starting with raw materials compliant with international standards, through CNC precision forming, 100% online key dimension inspection, and stability monitoring based on Statistical Process Control (SPC), we ensure every spring meets the most stringent specifications. We hold IATF 16949 certification and manage projects according to APQP processes, making us a trustworthy spring partner for your high-risk, high-value applications.
2.Tension Spring Product Description
Reliability is not an accidental outcome, but the result of careful design and management. The extension springs we provide for demanding applications are backed by a rigorous engineering methodology. We first work with you to define clear, measurable performance requirements and failure criteria. Then, we conduct Failure Mode and Effects Analysis (FMEA) to identify potential risk points in manufacturing and application, and establish preventive measures in design and process. During production, we control not only output parameters but also monitor the stability of process parameters (e.g., forming speed, heat treatment temperature profile). Finally, reliability testing (e.g., extended life testing, environmental stress screening) validates the product's robustness. What we deliver is a quality promise that gives you peace of mind.
3.Tension Spring Product Features & Advantage
|
Feature |
Advantage to You |
|
Preventive Quality Engineering |
Applies FMEA and error-proofing techniques, front-loading quality control to prevent defects from occurring rather than screening them out afterwards, fundamentally reducing quality risks. |
|
Statistical Process Control (SPC) Implementation |
Real-time SPC chart monitoring of key characteristics ensures the production process is in a statistically stable and controlled state, achieving predictable quality output. |
|
Comprehensive Inspection & Testing Capability |
Equipped with a high-precision tensile testing machine, salt spray test chamber, projector, etc., it can conduct comprehensive performance and reliability verification, and the data is true and reliable. |
|
Risk-Based Project Management |
For high-risk projects, we will launch a special control plan, increase review points and testing frequency, and provide you with the highest level of quality assurance. |
4. Tension Spring Product Specification
|
Reliability Parameter Dimension |
Control Standard & Test Method |
Target Value / Typical Result |
|
Dimensional Reliability |
|
|
|
Cpk (Process Capability Index for Key Dimensions) |
Cpk calculated for wire diameter, free length, inside hook width |
P1 Grade: Cpk ≥ 1.33; P2 Grade: Cpk ≥ 1.67 |
|
Full Dimension Inspection Report |
Full dimension measurement on first article and periodic sampling per drawing |
Report with actual measurement data provided |
|
Performance Reliability |
|
|
|
Load-Deflection Curve Consistency |
Overlap assessment of curves from same batch samples |
Load difference at key points < ±5% |
|
Initial Tension Relaxation Test |
Measure tension change after pre-load and 24-hour rest |
Relaxation Rate < 3% (Typical) |
|
Fatigue Life Test Report |
Cycle testing at specified travel until failure as required |
Provides median life and Weibull distribution parameters |
|
Environmental Reliability |
|
|
|
Salt Spray Test (NSS) |
Per ASTM B117 or equivalent standard |
Per surface finish requirement, e.g., Zn plated, 96 hours no red rust |
|
Damp Heat Storage Test |
e.g., 85°C/85% RH, 96 hours, performance change after test |
Load Change Rate < ±5% |
5.Tension Spring Product Application
Providing Springs for Applications Where Failure is Not an Option:
Safety-Critical Automotive Components: Seatbelt pretensioner springs, airbag trigger return springs, electronic parking brake actuator springs, where any failure could endanger lives.
Life Support & Diagnostic Equipment: Ventilator bellows drive springs, pacemaker component springs, blood analyzer valve springs, demanding absolute functional reliability and biocompatibility.
Critical Industrial Process Control: Nuclear power plant valve control springs, aviation ground support equipment safety lock springs, high-speed rail braking system sensor springs, where failure could lead to major accidents or economic loss.
High-Value Precision Instruments: Internal tensioning mechanisms in semiconductor lithography machines, mass spectrometer inlet system springs, astronomical telescope focus mechanism springs, where spring performance directly impacts instrument accuracy and value.
6. Frequently Asked Questions (FAQ)
Q: Can you handle complex custom designs and provide design optimization suggestions?
A: Absolutely. This is our core expertise. We provide free DFM analysis within 3-5 days, often helping clients achieve 15-30% cost reduction through design for manufacturability.
Q: How do you ensure quality consistency and handle defect issues?
A: We implement a rigorous 4-stage QC system with 100% full inspection. Our track record shows 99.99% qualification rate.
Q: What are your lead times and how do you handle urgent orders?
A: Standard lead times: 3-7 days for prototypes, 7-15 days for mass production. We offer VIP prioritization cutting lead times by up to 30%.
Q: Will I get timely responses and professional support throughout the project?
A: Yes. You get a 1v1 exclusive consultant with 1-hour initial response commitment and 24-hour technical support.
Q: Can you provide material certifications and environmental compliance reports?
A: Yes. We provide material certifications and environmental test reports (RoHS, REACH compliant) upon request.
Q: How do you protect my designs and intellectual property?
A: We start with mutual NDA and implement strict mold ownership protection and confidential data security measures.
Q: What are your payment terms and MOQ requirements?
A: We offer flexible payment terms (T/T, L/C at sight) and MOQ from 1 piece for prototyping.
Company Details
Business Type:
Manufacturer,Exporter,Seller
Year Established:
the year20
Total Annual:
20000000-30000000
Employee Number:
60~70
Ecer Certification：
Verified Supplier
Company Profile Tingfeng Hardware — Your Partner for High-Precision Non-Standard Components Since 2010, with 15 years of dedication, we focus on one mission: solving your “un-makeable, small-batch, urgent, and difficult” non-standard part manufacturing challenges. Core Streng... Company Profile Tingfeng Hardware — Your Partner for High-Precision Non-Standard Components Since 2010, with 15 years of dedication, we focus on one mission: solving your “un-makeable, small-batch, urgent, and difficult” non-standard part manufacturing challenges. Core Streng...
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