Illustrative drawing. Actual product is confirmed to your specification at quotation.
Chains
Duplex and Triplex Roller Chains
Multi-strand chains join two or three strands with long pins, so they carry more power than a single strand on the same pitch. They need duplex or triplex sprockets of the same pitch and strand count.
- Higher power in a narrower drive
- Duplex and triplex in ANSI and ISO
- Needs matching multi-strand sprockets
Specifications
- Material
- Carbon steelAlloy steel
- Type
- DuplexTriplex
- Size / section / duty
- Up to 12.7 mm pitch15.875 to 25.4 mm pitch31.75 to 50.8 mm pitch
- Standards
- ANSI B29.1ISO 606
Exact sizes, brands and availability are confirmed at quotation. Send the code or a photo of the old part.
Applications
- Heavy conveyors and elevators
- Crushers, mills and kilns
- High-torque gearbox outputs
- Steel plant and mining drives
Technical reference
ANSI roller chain dimensions (ANSI B29.1 / ASME)
| ANSI No. | Pitch (in) | Pitch (mm) | Roller diameter (mm) | Inner width (mm) |
|---|---|---|---|---|
| 25 | 1/4 | 6.35 | 3.30 | 3.18 |
| 35 | 3/8 | 9.525 | 5.08 | 4.77 |
| 40 | 1/2 | 12.7 | 7.92 | 7.85 |
| 50 | 5/8 | 15.875 | 10.16 | 9.40 |
| 60 | 3/4 | 19.05 | 11.91 | 12.57 |
| 80 | 1 | 25.4 | 15.88 | 15.75 |
| 100 | 1 1/4 | 31.75 | 19.05 | 18.90 |
| 120 | 1 1/2 | 38.1 | 22.23 | 25.22 |
| 140 | 1 3/4 | 44.45 | 25.40 | 25.22 |
| 160 | 2 | 50.8 | 28.58 | 31.55 |
Single-strand dimensions. Multi-strand chains have the same pitch with a strand spacing. Tensile strength varies by maker and is confirmed at quotation.
Related and matching products
Request a quote for Duplex and Triplex Roller Chains
Give us the code, size, brand and quantity, or a photo of the old part. We reply within one business day.
Common questions
- Which sizes of duplex and triplex roller chains do you supply?
- We supply duplex and triplex roller chains across the size range (Up to 12.7 mm pitch, 15.875 to 25.4 mm pitch, 31.75 to 50.8 mm pitch). Send the code, dimensions or a photo of the old part and we confirm the match, availability and lead time at quotation.
- Which standards apply to duplex and triplex roller chains?
- Common standards are ANSI B29.1, ISO 606. Tell us the standard you need and we will quote to it.
- Which brands can you supply?
- We supply Fenner, PIX and equivalent brands, and can quote alternatives where the application allows. Tell us your preferred brand and we confirm what is available.
- Can you supply in bulk or ship Pan India?
- Yes. We quote for single pieces and scheduled bulk supply, and ship Pan India. Confirm the quantity when you request a quote.
Need a quote on bulk or custom industrial supply?
Share your specifications and quantities — our technical team will respond with pricing and lead time within one business day.