Illustrative drawing. Actual product is confirmed to your specification at quotation.
Sprockets
Finished Bore Sprockets
Finished bore sprockets arrive with the bore, keyway and set screws already machined, so they can be fitted straight onto the shaft. Tell us the chain number, number of teeth, bore and keyway size.
- Bored, keyed and set-screwed
- Ready to fit on the shaft
- ANSI and ISO chain numbers
Specifications
- Material
- Mild steel (C45)Cast iron
- Type
- Finished boreType B
- 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
- Motor, gearbox and machine shaft drives
- Conveyors and elevators
- Packaging and processing machines
- Maintenance replacement
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.
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 Finished Bore 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 finished bore sprockets do you supply?
- We supply finished bore 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 finished bore 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.