20B Sprockets with Finished Bore, Keyway, and Hardened Teeth for DIN 8187 Roller Chains (B Series)
20B sprockets for roller chains with hardened teeth and finished bore with keyway are a special type of sprockets according to DIN 8187.
They have tempered teeth and they are ready for use on a specific shaft diameter with a key according to ČSN/DIN.
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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 1.30 MB)
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