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Heavy Duty Extension Spring for Industrial Use ISO9001 Certified
US$9.90
20-99 Sets
US$7.90
100-299 Sets
US$6.90
300+ Sets
Sample price:US$58.00/piece.Request sample
Product profile
Customization
AvailableFunction
Buffer, DriveMaterial
SteelModel NO.
CS-SP-219Usage
Auto, Home ApplianceLoad Type
ExtensionProduction Process
Cold RollShape
CoilSpring Material
Carbon Steel Spring WireStructure
Heavy Gauge Extension CoilPackage
Polybag-Paper Carton-Wooden CaseCustom HS Code
73202010Wire Diameter
0.1-80 mmMOQ
Any Small Trial Order Is WelcomeEnd Type
Loop EndsApplication 1
Industrial Door Tensioner, CounterbalanceApplication 2
OEM/ODM Custom ApplicationsOEM Service
AvailableFactory Since
2014Production Equipment
35 Sets of Spring Manufacturing EquipmentTransport Package
100X100X100cm Wooden Case, 1100kg, SeaworthySpecification
standardTrademark
chenjiOrigin
ChinaHS Code
7320209000Production Capacity
49000PC/WeekKey features
ISO 9001 certified heavy duty extension spring manufacturer since 2014 with 35 sets of production equipment
heavy duty extension spring engineered for Industrial Door Tensioner, Counterbalance and OEM/ODM Custom Applications with 0.1-80 mm wire diameter
Offered in 0.1-80 mm wire diameter with 12 mm inside diameter for the heavy duty extension spring
100% pre-shipment inspection with load and fatigue testing on every CHENJI-EXT-06 production lot
Shot peened and poly coated surface treatment for corrosion protection on the heavy duty extension spring
OEM and ODM private-label manufacturing for CHENJI-EXT-06 with custom branded packaging
35 sets of production equipment producing heavy duty extension spring to ISO 9001 standards
Custom wire diameter, free length, end form and finish available for the heavy duty extension spring
Company profile
Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2014-09-17Nearest Port: QingdaoAverage Response Time: ≤3.23hTerms of Payment: T/T, PayPal, Western UnionInternational Commercial Terms(Incoterms): FOB, CFR, CIF
AI-Powered supplier vetting
SummaryThe supplier is identified as a professional technical supplier offering 3D software design, SDK support, ODM, OEM, and multiple customization options. It reports brewing-equipment production of 1,000 sets annually, exports to a broad range of regions, and generally states lead times of within 15 working days off-season and one month during peak season, although another slice reports within 15 working days during peak season. CE certification and regular fire drills are documented. After-sales services include installation, debugging, maintenance, repair, and training. Financial records are indicated for 2021–2023, but no financial performance values are provided. Innovation evidence is weak because no new products were launched in the past year, and quality-control test equipment is reported as zero. The supplier states OEM service for popular brands, but no specific customer names or case details are provided.
Supplier typeThe supplier is explicitly identified as a professional technical supplier and provides 3D software design services. This supports classification as a technical and design-capable supplier rather than only a standard product manufacturer.
CertificationsThe supplier reports sustainable-development and product certification capability through CE certification. This is explicit certification evidence, although no additional certification types are listed.
After-Sales capabilityThe supplier has documented procedures and records for handling customer complaints and service corrective/preventive actions. It offers installation, debugging, maintenance, repair, and training, with service coverage determined by customer demand; however, it has no overseas warehouses, showrooms, agents, or branches.
Production capacityThe supplier reports annual brewing-equipment production of 1,000 sets, exports to numerous global regions, and an off-season lead time within 15 working days. It also reports one month for peak-season fulfillment in one slice, while another states within 15 working days during peak season, so peak-season capacity information is inconsistent.
Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. This is direct evidence of broad customization capability.
Product Q&A
Q:Can you explain the construction of this heavy duty extension spring?
A:
It is a extension spring with loop ends built to serve industrial door tensioner, counterbalance duty, made from carbon steel spring wire.
Q:What diameter range is offered?
A:
Standard size is a 12 mm inside diameter, with 0.1-80 mm wire diameter available.
Q:What duty does this heavy duty extension spring handle?
A:
It is built for industrial door tensioner, counterbalance and oem/odm custom applications work.
Q:What benefit does this design give me?
A:
The hook end form can match your bracket, which keeps counterbalance even and avoids slack in door tensioner systems.
Q:Is custom manufacturing available?
A:
Yes, custom wire diameter, free length, end form and finish can all be set to your specification.
Send Inquiry
*To:
Jinan Chenji International Trade Co., Ltd.
Jinan Chenji International Trade Co., Ltd.*Content:
Supplier replies will be sent to your registered email
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