What is the warranty period?

The period validity is one year.

Can you provide samples?

Yes, we can send samples for approval within 7 days. They are free of charge if we have available tools.

What is the supply ability?

The supply ability is 3,000,000 pieces per week.

OEM Retractable Flat Spiral Coil Constant Force Tension Spring Constant Force Retractable Flat Coil Spiral Spring Fire Damper

Name: OEM Retractable Flat Spiral Coil Constant Force Tension Spring Constant Force Retractable Flat Coil Spiral Spring Fire Damper
Brand: Dongguan Weihui Hardware Spring Products Co., Ltd.
SKU: 894861075

Guangdong, ChinaDongguan Weihui Hardware Spring Products Co., Ltd.

US$0.04

1,000-1,999 Pieces

US$0.02

2,000+ Pieces

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Function

Drive, Restoration, Retainning

Material

Stainless Steel

Model NO.

Usage

Industrial, Motorcycle

Load Type

Bend

Production Process

Hot Roll

Shape

Spiral

Name

OEM Flat Spiral Constant Force Spring for Fan Lift

OEM

Support

Delivery Time

10-15 Days

Color

as Picture

Transport Package

Inner Plastic Bag and Outer Carton

Specification

CUSTIOMIZED

Trademark

Origin

China

HS Code

7320909000

Production Capacity

3000000 Pieces/Week

Key features

OEM Customization Support: Full customization available from samples and designs with flexible options.

Stainless Steel Material: Constructed from durable stainless steel 301 for high corrosion resistance.

Constant Force Output: Maintains nearly constant force regardless of extension length after initial deflection.

High Endurance Limit: Engineered for over 100,000 cycles of operation without failure.

Fast Sample Delivery: Samples available for approval within 7 days, free if tools exist.

Competitive Pricing: Reasonable and competitive prices compared to other manufacturers.

24-Hour Response Time: Customer service team responds to inquiries within 24 hours.

Wide Application Range: Suitable for counterbalances, door closers, cable retractors, and more.

Company profile

Years of Export ExperienceHigh Repeat Buyers Choice

Dongguan Weihui Hardware Spring Products Co., Ltd.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 10 years CertifiedNearest Port: Guangzhou Port, Shenzhen PortAverage Response Time: ≤5.85h

AI-Powered supplier vetting

SummaryThe supplier is identified as a combined company and a professional technical supplier with manufacturing, export, service, quality-control, and R&D capabilities. It supports extensive customization, ODM, OEM for well-known brands, and reported new product development in the past year. Production exceeds 10 lines, with 6–10 quality-control staff, but only one year of total R&D engineer experience is stated. Service-support infrastructure is limited: no overseas warehouse, showroom, agents, branches, or offline trade-show participation, and no overseas service countries are reported. The supplier has quality assurance, but lacks written service procedures and an approved-supplier list. Financial records are identified by year, but no performance values are provided. No certification information or specific customer cases is supplied.

Supplier typeThe supplier is explicitly described as a professional technical supplier and a growing manufacturer, while its company type is listed as Combined. It reports more than 10 production lines and offers manufacturing, export trade, service, quality-control, and R&D functions.

R&D capabilityThe supplier is identified as a professional technical supplier, reported new products during the past year, and offers ODM services. However, it has no available SDK, and the stated total experience of R&D engineers is only one year, so the evidence supports product-development activity but not a conclusively strong innovation position.

Production capacityThe supplier operates more than 10 production lines, has 6–10 quality-control staff, and reports peak- and off-season lead times ranging from within 15 workdays to one month. Finished products are checked by packing staff, indicating an inspection step, although the stated inspection method appears limited.

Customization capabilityThe supplier explicitly supports customization from samples, designs, full customization, minor customization, and flexible customization. It also provides ODM and OEM services, including OEM service for well-known brands, directly demonstrating broad customization capability.

Product Q&A

Q:What is a constant force spring used for?

It is used where a constant load is required, such as counterbalances, door closers, cable retractors, hose retrievers, tool head returns, cabinet furniture, gym equipment, hair dryers, toys, electric motors, appliances, space vehicles, and other long-motion functions.

Q:What size is the constant force spring?

The constant force spring can be customized. The load is determined by the thickness, width of the material, and the diameter of the coil. Please send size or drawings to check feasibility.

Q:What information is needed for customization?

Please provide: 1. Material type, 2. Thickness, 3. Width, 4. Length, 5. Outer diameter or inner diameter.

Q:What is the minimum order quantity?

The minimum order quantity is 1000 pieces.

Q:What is the lead time for delivery?

The lead time is typically 6-10 days.