Single Loop Chain for Chainwheel, Valve, or Gear Operation
Can be cut to required length
- Material: Stainless steel, carbon steel, etc.
- Surface Treatment: Original color, Zinc-Plated, Electroplated, Polished, Blu-Krome etc.
- Standard or Size: Complies with global standards and can be customized according to your requirements.
- Design Factor: 4:1
- Packing Method: Poly Bags, Cartons, Reels, Plastic Pail, Fiber Drum, Pallet Boxes, etc.
Please Note: Lock link single loop chain is only for transmission, control, and other general utility purposes, not for lifting or heavy load suspension.
For different materials, finishes, or hanging applications, we also supply Hanging Chain Manufacturer and Stainless Steel Jack Chain Manufacturer.
Single Loop Chain Size Chart
| Trade Size | Diameter (A) | Inside Link Length (B) | Links Per Foot | Links Per Meter | Weight | Working Load Limit | ||||
| inches | mm | inches | mm | Ft/lbs | kg/m | lbs | kg | |||
| #2 | 0.091 | 2.311 | 1.1 | 27.94 | 11 | 36 | 0.1 | 0.149 | 155 | 70.307 |
| 1/0 | 0.12 | 3.048 | 1.29 | 32.766 | 9.3 | 30.5 | 0.17 | 0.253 | 265 | 120.202 |
| 2/0 | 0.135 | 3.429 | 1.47 | 37.338 | 8.2 | 27 | 0.23 | 0.342 | 340 | 154.221 |
| 3/0 | 0.146 | 3.708 | 1.64 | 41.656 | 7.3 | 24 | 0.28 | 0.417 | 405 | 183.705 |
| 4/0 | 0.162 | 4.115 | 1.78 | 45.212 | 6.7 | 22 | 0.29 | 0.432 | 485 | 219.992 |
| 5/0 | 0.177 | 4.496 | 2.15 | 54.61 | 5.6 | 18.3 | 0.4 | 0.595 | 580 | 263.084 |
What is Single Loop Chain?
Single loop chain is a light weldless chain, also called lock link chain, Its working tension is similar to that of a double loop chain and is higher than that of a jack chain, and can be used with the S hook and other connecting pieces.
The links of single loop chains are simple and reliable single rings, arranged flat, not easy to tangle, and can fit well with gear structures. It has good strength and flexibility, and is widely used in many industrial and building applications, such as valve chain wheel(sprocket wheel) operation, garage door and overhead door system, pipe hanging and support, and ventilation equipment control. It is one of the practical chains often used by pipe installers, valve manufacturers, and building contractors etc.
Features of Tuohai Single Loop Chain

Fully automatic production, real-time check of chain size, can match chainwheels and machines of many standards.

Strict deburring process, no sharp edges on the single loop chains, safer to use and won’t scratch hands.

Many surface treatments to make sure the chain stays smooth and rust-free even after long use in different places.

We use automated production to make single loop chain faster and shorter in time, greatly improving your business efficiency.
Accurate Match with Different Gear Parts or Accessories
Tuohai can make special size single loop chain exactly according to your chain wheel or other similar parts. No matter for steam valves or overhead doors system, it can avoid slip or jam, improve the transmission efficiency of the unit, and reduce noise, make sure the operation is smooth and reliable.


Excellent Surface Treatment
Tuohai can provide lock link chain with plating, electrophoresis, polishing, and Blu-Krome surface treatment. These not only improve the anti-corrosion performance, make sure it is stable and reliable in wet, outdoor, or chemical environments, but also make the surface more smooth. Our lock link chain will not get stuck during use, works smoother when operating different valves or chain wheels, and helps increase the service life of the whole system.
Why Choose Tuohai


Shorter Lead Time: Tuohai has automated production lines, which greatly shorten the production time of single loop chain. Custom sample orders can be shipped in 7 days, and bulk orders can also be finished faster.
Strict Quality Control: From raw material purchase and inspection, to the production process monitoring and final check before delivery, every step has detailed records, to make sure the size and strength of our single loop chain can fully meet your standard.
Complete Test reports and Certificates: All batches of single loop chain can provide test data such as tensile tests and salt spray tests, and can also provide CE, ISO and other third party certificates, to meet the requirements of exports and various projects.
Good Logistics Service: No matter by express, sea or air, Tuohai can provide you with high-quality logistics service, to make sure our single loop chain can arrive at your designated location safely and quickly, without delay for your project or purchase plan.
Related Product
In chain wheel drive system, the inside length and wire diameter of the chain are key sizes to make sure single loop chain and chain wheel fit well, they must match the pitch and tooth size of the chain wheel exactly. This not only affects the smooth and reliable drive of the transmission, but also relates to the efficiency and service life of the system. Good match can make the chain go into the groove smooth, avoid slip, jam, noise or too much friction, and also help keep drive accuracy, reduce running mistake, and improve total durability.
Tuohai lock link single loop chain can be used for many valve making, pipe fixing, and various of building install works, such as:
- For sprocket wheels (chain wheels), it can be used as the part of machine or equipment drive or control.
- In overhead door opening and closing systems, to give stable and reliable control.
- In industrial hanging and pipe install, the single loop chains can be used as pipe suspension to fix and support pipe structures.
- For steam valves or other valve wheels, it can also be used as operation chain, especially ideal for light-load rotation or position control.













