What Is a #40 Roller Chain Used For? Applications Guide
A #40 roller chain is a common ANSI chain. It is used for industrial machines, conveyors, and mechanical power transmission. It has a pitch of 0.500 inch (12.70 mm). It gives a good balance of strength, size, and cost.
If you choose a replacement chain or design a new machine, you need to know the applications and dimensions of #40 chain. This helps you pick the right product.
What Is a #40 Roller Chain?
A #40 roller chain is a standard ANSI roller chain. Its size is the identifier. You can find it as #40 chain, 40 chain, or 40 roller chain.
Typical dimensions include:
| Specification | #40 Roller Chain |
|---|---|
| Chain size | #40 |
| Pitch | 0.500 in / 12.70 mm |
| Roller diameter | 0.312 in / 7.92 mm |
| Inner width | Approx. 0.312 in |
| Pin diameter | Approx. 0.156 in |
| Standard | ANSI B29.1 |
The roller diameter, pitch, and inner width are important. They help match the chain with the right sprockets.
What Is #40 Roller Chain Used For?
1. Power Transmission
One common use is power transmission. It transfers rotation from one shaft to another with sprockets.
Typical applications include:
- Electric motors
- Pumps
- Gearboxes
- Industrial machines
- Automated equipment
2. Conveyor Systems
#40 chain can also be used in conveyors and material handling systems. It can drive conveyor shafts. It can also move products if the system uses roller chain.
Common applications include packaging lines, assembly equipment, and small industrial conveyors.
3. Packaging Machinery
Packaging equipment needs compact and reliable parts. #40 chain is common in filling, labeling, carton handling, and product transfer machines.
4. Agricultural Equipment
Some farm and processing machines use #40 chain for drives and material handling. In dusty or outdoor places, you need good lubrication and maintenance. This makes the chain last longer.
Choosing the Right #40 Chain
Before you buy a replacement, check more than the chain number. Measure the size, pitch, roller diameter, and inner width. Also make sure the sprocket is made for #40 chain.
You should also consider:
- Required chain length
- Operating speed
- Working load
- Tensile strength
- Material
- Lubrication
- Operating environment
Carbon steel is common for general industry. But stainless steel can be better if you need corrosion resistance.
What Sprocket Fits #40 Chain?
A #40 chain needs a #40 sprocket. Choose the tooth count, bore size, hub style, and keyway based on the machine.
Using the right chain and sprocket gives smooth engagement. It also cuts early wear.
Frequently Asked Questions
What is the pitch of #40 roller chain?
The standard pitch is 0.500 inch (12.70 mm).
What is the roller diameter of #40 chain?
The standard roller diameter is approximately 0.312 inch (7.92 mm).
Is #40 chain the same as 40 roller chain?
Yes. #40 chain and 40 roller chain generally refer to the same ANSI chain size.
Is #40 roller chain suitable for conveyors?
Yes. It can be used for many conveyor and material-handling applications when its load and speed capacity meet the system requirements.
Conclusion
A #40 chain works well for power transmission, conveyors, packaging, farm equipment, and other industrial uses. Its standard ANSI dimensions make it easy to find replacement chains and sprockets.
When you pick #40 chain, always check the full dimensions, tensile strength, material, working conditions, and sprocket fit. Do not just look at the chain number.
