Illustrative drawing. Actual product is confirmed to your specification at quotation.
Sprockets
Duplex and Triplex Sprockets
Duplex and triplex sprockets carry two or three strands of chain side by side. Choose the same pitch, number of teeth and strand count as the chain. They are used where one strand is not enough to carry the power.
- Two or three rows of teeth
- Matched to multi-strand chain
- Taper lock or finished bore
Specifications
- Material
- Mild steel (C45)Cast iron
- 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
- Mining and steel plant drives
Technical reference
Sprocket pitch diameter by number of teeth
| Teeth | 12.7 mm pitch | 15.875 mm pitch | 19.05 mm pitch | 25.4 mm pitch |
|---|---|---|---|---|
| 13 | 53.1 | 66.3 | 79.6 | 106.1 |
| 15 | 61.1 | 76.4 | 91.6 | 122.2 |
| 17 | 69.1 | 86.4 | 103.7 | 138.2 |
| 19 | 77.2 | 96.4 | 115.7 | 154.3 |
| 21 | 85.2 | 106.5 | 127.8 | 170.4 |
| 23 | 93.3 | 116.6 | 139.9 | 186.5 |
| 25 | 101.3 | 126.7 | 152 | 202.7 |
| 30 | 121.5 | 151.9 | 182.2 | 243 |
| 38 | 153.8 | 192.2 | 230.7 | 307.6 |
Calculated from the standard formula PD = pitch / sin(180° / teeth). Shown for 12.7, 15.875, 19.05 and 25.4 mm pitch chains (ANSI 40, 50, 60, 80 / ISO 08B, 10B, 12B, 16B). Values in mm.
Related and matching products
Request a quote for Duplex and Triplex Sprockets
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 sprockets do you supply?
- We supply duplex and triplex sprockets 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 sprockets?
- 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.