20B Sprockets with Finished Bore, Hub, and Hardened Teeth for DIN 8187 Roller Chains (B Series)
20B-1 sprockets with finished bore, hub, and hardened teeth are ready for immediate installation on the appropriate shaft without the need for additional machining. They are designed for drives with all types of 20B-1 (1 1/4″ × 3/4″) simplex roller chains of the so-called European series (B series), standardized to ISO 606 (DIN 8187). They are manufactured in simplex design.
The bore with a keyway ensures precise mounting and effective power transmission. It is manufactured with a tolerance field of H7. Additionally, the hub is equipped with two threaded holes and set screws for precise shaft fixation.
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Sprockets Fields of Use
The 20B sprockets with hardened teeth and finished bore with keyway are designed for general use on machines.
They are used especially for conveyors, food processing machines, glass machines and many other devices.
Sprockets Material
Steel C43.
Sprockets Code Description
Example:
20B-1-12-NKZ/D42 (1 1/4 × 3/4) - 12 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 42H7, Keyway (Steel)
| Code Part | Description |
|---|---|
| 20B |
Chain type |
| 1 |
Simplex design |
| 12 |
Number of teeth |
| NKZ/D |
Design with hub, hardened teeth, 2 threads with screws, and finished bore |
| 42 |
Finished bore diameter (in mm) |
| 1 1/4 × 3/4 |
Pitch (in inches) × inner width (in inches) |
| 12 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 42H7, Keyway (Steel) |
Sprocket design, finished bore diameter (in mm) with tolerance field, and sprocket material |
Documents for Download
Dimensions and Parameters of Hardened Teeth Sprockets with Finished Bore
TYMA CZ Data Sheets
Czech and English (PDF 1.39 MB)
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