What is the validity period of the product?

The period validity is one year.

What materials are used for the constant force spring?

The most common material is stainless steel 301, but other material types can be customized based on customer requirements.

How do you handle packaging?

Inner packing is as per customer's requirement (PE bag and blister). Outer packing is carton or box due to customer's requirement.

Custom Stainless Steel 3m Constant Force Spring for Fire Damper

Name: Custom Stainless Steel 3m Constant Force Spring for Fire Damper
Brand: Dongguan Weihui Hardware Spring Products Co., Ltd.
SKU: 844153635

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.

N/A

Usage

Industrial, Motorcycle

Load Type

Bend

Production Process

Hot Roll

Shape

Leaf

Transport Package

Inner Plastic Bag and Outer Carton

Specification

CUSTIOMIZED

Trademark

N/A

Origin

China

Key features

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

Customizable Shape: Available in Coil, Disk, Dish, Leaf, Wire, and Waved shapes.

Material Customization: Material type can be selected based on customer drawings or samples.

High Endurance Limit: Endurance limit reaches up to 100,000 cycles.

Fast Sample Delivery: Samples can be sent within 7 days; free if tools are available.

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

OEM/ODM Service: Full customization, minor customization, and flexible customization available.

High Supply Capacity: Supply ability of 3,000,000 pieces per week.

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: ≤5.99h

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?

The constant force spring is an excellent device for applications where a constant load is required. Some of the many applications of constant force springs are in counterbalances, door closers, cable retractors, hose retrievers, tool head returns, cabinet furniture components, gym equipment, hair dryers, toys, electric motors, appliances, space vehicles, and other long-motion functions. It generates the constant force which can lift the goods in even speed.

Q:What size is the constant force spring?

The constant force spring can be customized. The constant force spring load is basically determined by the thickness and width of the material, also the diameter of the coil. You can send the size or drawing to us to check the manufacturing feasibility. Please provide below basic information to us: 1. Material type 2. Thickness 2. Width 3. Length 4. Outer diameter or inner diameter.

Q:What is the minimum order quantity?

The minimum order quantity is 1000 Piece/Pieces.

Q:What is the lead time for production?

The lead time is 6-10 days.

Q:Can you provide samples?

Yes, we can send samples for your approval within 7 days. It is free of charge if we have available tools.

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Custom Stainless Steel 3m Constant Force Spring for Fire Damper