China Hot selling DIN5686 Weldless Knotted Double Loop Chain

Product Description

Product Description


No. Diameter  (D)
Inside Length (A)
Outside Width (B)
Breaking Load
Weight per 100m 
14 1.4 20 6.5 16 4.2
16 1.6 23 7 22 6
20 1.8 26.5 8 30 7.3
22 2 28 9 40 9
25 2.2 31 10 50 11
27 2.5 35 11 70 14
30 2.8 39 12.5 90 17
32 3.1 41 14 120 21
35 3.4 44 15.5 140 26
40 3.8 46 17 160 34
45 4.2 52 19 170 41
50 4.6 58 20.5 180 50
55 5 60 22.5 190 57


Double loop chain is a general utility chain for multiple applications such as playground & gym equipment, porch swings, animal chains and light fixtures. Available in both type 304 stainless steel and bright zinc (electro galvanized) finishes.

Double loop chain is a non-welded chain with a very wide range of applications, with a high working load limit and flexibility. 

The double loop chain has many uses, such as pet chain, porch swing, playground, padlock chain, boat chain, and the fixing device, etc.

Detailed Photos

Production Process


Full Auto Matic Production Process

Raw Material Blanking Bending
Galvanize Proof Load Test Welding



Breaking Load Testing Test Result

Packaging & Shipping

Package and Loading
Plastic Pail Plastic Pail 2 PP Bag
Iron Barrel Wooden Case Load in Container

Company Profile

 ·HangZhou CZPT Co.,Ltd. is located in HangZhou, China.

·As the leading manufacturer for chain and rigging supplies, we carry a diverse portfolio of products engineered to exceed the toughest demands in any industry.
·Our products include welded chain, grade80 and grade 100 lifting chain, chain slings, hooks, shackles, hoist rings, turnbuckles, snatch blocks, wire rope and otheraccessories.

·We also handle a host of custom engineered solutions for our customers.

·At Powerful Machinery, we have a team of professionals working together to provide our customers with the best products    and services.

·It is not just about lifting produts, it’s about working with a trusted partner who is invested in your success.


1. Where is your factory located?
Our factory is located at #37, Xihu (West Lake) Dis. Road, Xihu (West Lake) Dis., HangZhou City, ZheJiang Province, China. 
You’re welcomed to visit us any time for future cooperation.

2. What products do you supply?  
As mentioned above, HangZhou CZPT is capable of supplying:
♦ all kinds of marine supplies ♦ chains♦ rigging hardwares♦ related hardwares

3. Do you produce them all?
We produce all kinds of chains in our factory, other products in our partner factories. By establishing cooperation agreements & capital injection, we obtained a wide & CZPT supply chain to meet your demands.

4.  How do I pay? 
We accept 30% payment in advance & 70% before shipment for the first cooperation, either by T/T or L/C.

5. How do I receive the goods? 
With our professional transport agents, we are capable of delivery products to most ports all over the world. Door-to-door service is also supported.
FOB, C&F, CIF are most commonly used trade terms.

Our Advantages

How do you control quality? 
By setting up quality control points and inspecting at each production process with strict standards, the defective products will be eliminated before packaging and delivery. For partner factories, we use a comprehensive system of quality standards to evaluate the 
production line. Also our professional QC team will implement the onsite check and finish product check before delivery.

Why are you more trustworthy than the other factories? 
Quick Response: 
We feedback your questions immediately 24 hours a day, 7 days every week.
Competitive Price:
We can provide a more competitive price based on the same quality level by more efficient management in every process.

One-stop Solution:
Just say what you need, and we’ll figure out a one-stop solution for your business to save your time and effort.



HangZhou CZPT Co.,Ltd. is the company that certified by SGS , BV, ISO 9001 
Third Party certification by product provides 1 or more of the following services: Inspection, Certification Service, Testing Service.

This Certification can be confirmed to theri standards, the customer’s standards, or the manufacturer’s own standards.
If customer request at time of order, we will work with you to cerfify any of our products to any third party organization.



•  We attend exhibition every year, to visit our clients and develop new clients

National Hardware Show in Las Vegas, USA
MITEX in Mosco, Russia
International Hardware Fair in Cologne, Germany
Hardware and Tools MiddleEast in Dubai, UAE
Vietnam Hardware and Hand Tools in Ho Chi Minh, Vietnam

•   Our products, such as high grade chains, rigging hardwares,blocks & pulleys, steel  wire rope, stainless steel products, 
are popular in Europe, U.S.A, most Asia areas for its first class quality and competitive price.

•   By offering one-stop solution service, our experienced customer service team can assist you from inquriy to delivery.

Usage: Decorative Chain
Material: Iron
Surface Treatment: Electro Galvanize
Feature: Q235 Carbon Steel
Chain Size: 1.4mm~5mm
Structure: Weldless Chain
US$ 10/Piece
1 Piece(Min.Order)

Request Sample



Customized Request

double chain

How do double chains handle angular misalignment between sprockets?

Double chains, like other types of roller chains, have some ability to accommodate limited angular misalignment between sprockets. Angular misalignment occurs when the rotational axes of the driving and driven sprockets are not perfectly aligned, causing the chain to engage at an angle.

The ability of double chains to handle angular misalignment is attributed to their flexible construction, which allows the pins and bushings to articulate within the chain links. This flexibility allows the chain to adjust its position slightly as it moves around the sprockets, accommodating minor misalignments.

However, it is important to note that double chains have less tolerance for angular misalignment compared to other types of chains, such as roller chains with longer pitches or specialty chains designed specifically for misalignment compensation. Therefore, it is essential to minimize angular misalignment as much as possible to ensure optimal chain performance and longevity.

To minimize angular misalignment between sprockets when using double chains, consider the following steps:

  • Proper Alignment: Ensure that the driving and driven sprockets are accurately aligned on their respective shafts. Misalignment should be kept within acceptable limits specified by the chain manufacturer.
  • Sprocket Selection: Use sprockets with the correct number of teeth and pitch diameter to match the double chain. Incorrect sprocket sizes can exacerbate angular misalignment issues.
  • Maintenance: Regularly inspect and maintain the chain drive system to identify and rectify any misalignment before it leads to premature wear or failure.
  • Chain Tension: Maintain the appropriate tension in the double chain to prevent excessive sagging or slack that could increase the risk of misalignment.

By taking these precautions, double chains can effectively handle the typical levels of angular misalignment found in many chain drive applications, providing reliable and efficient power transmission.

double chain

What are the signs of wear and when should a double chain be replaced?

Identifying the signs of wear in a double chain is important for determining when it needs to be replaced. Here are some common signs of wear to look out for:

  • Chain Elongation: Over time, a double chain can elongate due to wear on the pins, bushings, and rollers. Excessive chain elongation can cause poor engagement with the sprockets and lead to inaccurate power transmission. Measuring the chain’s pitch length using a chain gauge can help determine if it has elongated beyond the acceptable limits.
  • Increased Noise and Vibration: As a double chain wears, it can produce increased noise and vibration during operation. Excessive noise and vibration may indicate worn or damaged components, such as worn rollers or elongated bushings.
  • Visible Signs of Wear: Inspect the chain for visible signs of wear, such as worn or deformed rollers, elongated or distorted bushings, or heavily worn sprocket engagement surfaces. Additionally, check for signs of corrosion or rust, as these can also contribute to chain degradation.
  • Stiffness and Resistance: A worn double chain may exhibit stiffness or resistance when flexing or moving. This can be due to the increased friction caused by worn components or inadequate lubrication.
  • Frequent Chain Failure or Breakage: If the double chain is experiencing frequent breakage or failure, it is a clear indication of significant wear or damage. This can be a safety hazard and should prompt immediate replacement.

It is recommended to regularly inspect the double chain for these signs of wear and perform maintenance tasks such as lubrication and tension adjustment. However, if any of the above signs are evident, or if the chain has reached its maximum allowable elongation, it is necessary to replace the chain promptly to avoid potential equipment damage, reduced performance, and safety risks.

double chain

Can double chains be used in high-speed applications?

Yes, double chains can be used in high-speed applications, but there are certain considerations to keep in mind to ensure their safe and efficient operation.

When using double chains in high-speed applications, it is important to select a chain that is specifically designed and rated for high-speed operation. High-speed chains are typically manufactured with precision and high-quality materials to withstand the stresses and forces experienced at elevated speeds.

Here are some key factors to consider when using double chains in high-speed applications:

  1. Chain Type: Choose a double chain type that is suitable for high-speed operation. Certain chain designs, such as those with lightweight construction and optimized profiles, are specifically engineered for high-speed applications.
  2. Material Selection: Consider using double chains made from high-strength and wear-resistant materials. These materials can withstand the higher forces and reduce the risk of wear and fatigue at high speeds.
  3. Lubrication: Proper lubrication is crucial for high-speed chain operation. Use lubricants that are specifically designed for high-speed applications and ensure that the chain is adequately lubricated to minimize friction and heat generation.
  4. Tension and Preload: Maintain proper tension and preload in the double chain to ensure smooth engagement with the sprockets. Proper tensioning helps prevent excessive vibration, noise, and premature wear at high speeds.
  5. Bearing Support: Ensure that the chain is properly supported by high-quality bearings and sprockets designed for high-speed operation. The bearings should be able to handle the increased rotational speeds and provide smooth motion.
  6. Alignment and Balance: Proper alignment of the chain and sprockets is critical for high-speed applications. Misalignment can lead to increased wear, vibration, and potential chain derailment. Ensure the sprockets are aligned and balanced to minimize any unwanted forces on the chain.
  7. Regular Inspection and Maintenance: Regularly inspect the double chain for signs of wear, fatigue, or damage. Perform routine maintenance tasks such as lubrication, tension adjustment, and replacing worn-out components to ensure the chain’s reliable performance at high speeds.

It is important to consult the manufacturer’s guidelines and specifications for the specific double chain type and application requirements. Additionally, working with experienced engineers or chain suppliers can provide valuable insights and assistance in selecting the appropriate double chain for high-speed applications.

China Hot selling DIN5686 Weldless Knotted Double Loop Chain  China Hot selling DIN5686 Weldless Knotted Double Loop Chain
editor by CX 2023-07-25