Overview
What are pilot bore sprockets
Chains and sprockets make for an inseparable pair for power transmission, still indispensable today for a wide variety of engineering applications. A crucial requirement for their efficient operation is the use of high-quality steels and compliance with international standards during manufacturing. Pilot bore sprockets are supplied with an unmachined central bore, ready for further machining to the specific shaft.
Nibora Ltd. keeps single-hub sprockets in stock for single (Simplex), double (Duplex) and three-row (Triplex) chains per DIN 8187, made of C45 steel.
Summary table by chain size
| Chain | Pitch p (mm) | Roller (mm) | B1 (mm) | B2 (mm) | B3 (mm) | C (mm) | r3 (mm) |
|---|---|---|---|---|---|---|---|
| 06B | 9,525 | 6,35 | 5,3 | 15,4 | 25,6 | 1 | 10 |
| 08B | 12,7 | 8,51 | 7,2 | 21 | 34,9 | 1,3 | 13 |
| 10B | 15,875 | 10,16 | 9,1 | 25,5 | 42,1 | 1,6 | 16 |
| 12B | 19,05 | 12,07 | 11,1 | 30,3 | 49,8 | 2 | 19 |
| 16B | 25,4 | 15,88 | 16,2 | 47,7 | 79,6 | 2,5 | 26 |
| 20B | 31,75 | 19,05 | 18,5 | 54,6 | 91 | 3,5 | 32 |
| 24B | 38,1 | 25,4 | 24,1 | 72 | 120,3 | 4 | 38 |
| 28B | 44,45 | 27,94 | 29,4 | 88,4 | 148 | 5 | 44 |
| 32B | 50,8 | 29,21 | 29,4 | 87,4 | 146 | 6 | 51 |
Specifications
Download PDF ↓Full size table — sprockets for pilot bore
| Chain | Z | de (mm) | dp (mm) | Simplex | Duplex | Triplex | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| dm | D | A | kg | dm | D | A | kg | dm | D | A | kg | |||||
No matching sprocket — contact us for a custom configuration.
Frequently asked questions
What does "pilot bore" mean?
A sprocket with an unmachined central bore ("blank") - supplied without final bore machining, which is bored out to the exact shaft diameter at installation.
What chain sizes do the sprockets cover?
9 sizes - from 06B to 32B per DIN 8187/ISO 606, each in Simplex, Duplex and Triplex versions, with a tooth count (Z) range shown in the full table below.
What is the price of sprockets?
Contact Nibora Ltd. for a quote based on the chain size and tooth count you need.