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What Does 520 Mean On Chain Size?
Do you get confused when you see numbers like 520, 525, or 530 on chains?
Roller Chain Size Chart: Choose the Correct Chain Type
Table of Contents
Wrong chains break.
Wrong chains break. This is bad. You lose time. You lose money. Your machines stop working. This happens to many people.
Do you use the wrong size chain? Bad things happen:
- Chains break fast
- Parts get damaged
- Work stops
- Money is lost
Why This Hurts So Much
When chains break, it hurts your business. You might feel:
- Worried about fixing machines
- Upset about lost time
- Mad about wasted money
- Stressed about missed work
One farm lost $12,000 each year from using the wrong chains! The wrong chain is like wearing shoes that don’t fit – it just won’t work right.
We Can Fix This Problem
We make good chains at our factory. We have the right size for you. Our chains:
- Last longer
- Work better
- Save money
- Keep machines running
A food plant fixed their problems with our chains. They had 40% less downtime!
Understanding Roller Chain Sizes
Let’s look at chain sizes. This will help you pick the right one.
ANSI vs. ISO Chains
There are two main types of chains:
- ANSI chains (American)
- ISO chains (International)
Here’s how they match up:
| Chain Size | Pitch | Roller Size | How Strong | What It’s For |
|---|---|---|---|---|
| ANSI #25 | 0.250″ | 0.130″ | 1,400 lbf | Small machines |
| ANSI #40 | 0.500″ | 0.306″ | 3,800 lbf | Bikes, conveyors |
| ANSI #50 | 0.625″ | 0.400″ | 6,100 lbf | Big machines |
| ISO 08B | 12.7mm | 7.75mm | 17.8 kN | Robots |
| ISO 10B | 15.88mm | 10.16mm | 22.7 kN | Cars, elevators |
ANSI #40 is the most used chain in the US. It makes up 48% of all sales!
How to Read a Chain Size Chart
Measuring matters. Here’s how to find your chain size:
Step 1: Check the Pitch
Pitch is how far apart the pins are. Use a ruler to measure from the middle of one pin to the middle of the next pin.
Step 2: Look at the Width
The width is how wide the chain is. This needs to match your sprockets.
Step 3: Check the Roller Size
The roller is the round part that touches the sprocket. Its size must match.
Step 4: Match It Up
Once you have these numbers, use our chart to find your chain.
Why Chains Fail
Chains break for many reasons:
| What Goes Wrong | How Often | What It Does | How to Fix It |
|---|---|---|---|
| Wrong Size | 32% | Fast wear | Use size charts |
| Too Stretched | 28% | Chain skips | Replace at 3% stretch |
| Not Lined Up | 22% | Uneven wear | Line up sprockets |
| Not Oiled | 18% | Rust, wear | Use chain oil |
Wrong sizing is the #1 problem! That’s why our size charts are so helpful.
Picking the Right Chain
Here’s how to pick the best chain for your job:
- Small jobs → Use #25 or #35 chain
- Medium jobs → Use #40 chain (most common)
- Big jobs → Use #50 or bigger chain
- Special jobs → Ask us for help
Check out our full roller chain selection for all options.
Real Stories of Chain Success
When people use the right chain, good things happen:
A food plant switched to ISO 10B chains. They had 40% less downtime and chains lasted twice as long!
A bike shop moved from #35 to #40 chains. They had 25% fewer problems.
Farms using #60 chains instead of #50 saved $12,000 each year.
Our transmission chain options can help you too!
The Market for Chains
Chains are big business:
- The world spends $4.2 billion on roller chains each year
- ANSI #40 is the most popular size (48% of all sales)
- ISO chains are growing fast (12% more each year)
- Heavy chains (#50 and up) make up 65% of industrial use
This shows how important it is to get the right chain.
How to Measure Your Chain
You need the right tools to check your chain:
- Digital Caliper – Measures size parts
- Chain Wear Gauge – Checks for stretch
- Ruler – Measures pitch (pin to pin)
If your chain has stretched 3% or more, it’s time to replace it!
Why Choose Our Chains
We make great chains because:
- We use good materials
- We have strict quality control
- We make chains to exact standards
- We can customize for your needs
- We offer wholesale prices
Our chain drive solutions are trusted worldwide.
What Makes Our Factory Special
We are not just another chain maker. We:
- Make chains for 40+ years
- Ship to 50+ countries
- Test 100% of our chains
- Offer OEM services
- Give wholesale prices
How to Order the Right Chain
Getting the right chain is easy:
- Measure your current chain
- Check our size chart
- Contact us with your needs
- Get a fast quote
- Receive your perfect chain
Free Help and Tools
We offer helpful extras:
- Free size chart PDF
- Chain wear guides
- Technical support
- Custom solutions
Take Action Now
Don’t risk more broken chains. Don’t lose more time and money.
Contact us today to get the right chains for your needs.
- Phone: +86 188 2020 0782
- Email:[email protected]
- Website: https://machinerysprocket.com/
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