Can you provide samples?

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

What is the material of the constant force spring?

The most common material is stainless steel 301.

What is the endurance limit of the spring?

The endurance limit is 100,000 times.

Stainless Steel Negator Closure Fire Damper Constant Force Spring

Name: Stainless Steel Negator Closure Fire Damper Constant Force Spring
Brand: Dongguan Weihui Hardware Spring Products Co., Ltd.
SKU: 836957445

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

US$0.09

1,000-1,999 Pieces

US$0.07

2,000+ Pieces

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Function

Retainning

Material

Stainless Steel

Model NO.

Con-01

Usage

Industrial, Motorcycle

Load Type

Bend

Production Process

Hot Roll

Shape

Spiral

Transport Package

Inner Plastic Bag and Outer Carton

Specification

CUSTIOMIZED

Key features

Customizable Color: Color can be customized according to customer requirements.

Customizable Size: Size is fully customizable based on provided drawings or samples.

High Force Output: Provides consistent and highly reliable force over the spring's travel length.

Compact Design: Small space requirements combined with smooth extension and retraction.

Durable Material: Made of stainless steel 301 for corrosion resistance and longevity.

High Endurance: Endurance limit of 100,000 cycles for long-term reliability.

Fast Sample Delivery: Samples available for approval within 7 days, free if tooling exists.

Competitive Pricing: Reasonable and competitive prices with best quality assurance.

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: ≤5.71h

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 for applications requiring constant load, 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. It generates constant force to lift goods at even speed.

Q:What size is the constant force spring?

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

Q:What information is needed to customize the spring?

Please provide the following basic information: 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 production?

The lead time is 6-10 days.

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Stainless Steel Negator Closure Fire Damper Constant Force Spring