12B Sprockets with Finished Bore, Hub, and Hardened Teeth for DIN 8187 Roller Chains (B-Series)
12B 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 12B-1 (3/4″ × 7/16″) simplex roller chains of the so-called European series (B-series), standardized to ISO 606 (DIN 8187). They are available 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.
Products are sorted by name in ascending order.
12B-1-10-NKZ/D19 (3/4” × 7/16”) - 10 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 19H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
7.62€ excl. VAT
9.22€ incl. VAT
12B-1-10-NKZ/D20 (3/4” × 7/16”) - 10 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 20H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
7.62€ excl. VAT
9.22€ incl. VAT
12B-1-10-NKZ/D24 (3/4” × 7/16”) - 10 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 24H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
7.62€ excl. VAT
9.22€ incl. VAT
12B-1-10-NKZ/D25 (3/4” × 7/16”) - 10 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 25H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
7.62€ excl. VAT
9.22€ incl. VAT
12B-1-10-NKZ/D28 (3/4” × 7/16”) - 10 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 28H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
7.62€ excl. VAT
9.22€ incl. VAT
12B-1-10-NKZ/D30 (3/4” × 7/16”) - 10 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 30H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
7.62€ excl. VAT
9.22€ incl. VAT
12B-1-10-NKZ/D32 (3/4” × 7/16”) - 10 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 32H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
7.62€ excl. VAT
9.22€ incl. VAT
12B-1-11-NKZ/D19 (3/4” × 7/16”) - 11 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 19H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
9.06€ excl. VAT
10.97€ incl. VAT
12B-1-11-NKZ/D20 (3/4” × 7/16”) - 11 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 20H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
9.06€ excl. VAT
10.97€ incl. VAT
12B-1-11-NKZ/D24 (3/4” × 7/16”) - 11 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 24H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
9.06€ excl. VAT
10.97€ incl. VAT
12B-1-11-NKZ/D25 (3/4” × 7/16”) - 11 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 25H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
9.06€ excl. VAT
10.97€ incl. VAT
12B-1-11-NKZ/D28 (3/4” × 7/16”) - 11 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 28H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
9.06€ excl. VAT
10.97€ incl. VAT
12B-1-11-NKZ/D30 (3/4” × 7/16”) - 11 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 30H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
9.06€ excl. VAT
10.97€ incl. VAT
12B-1-11-NKZ/D32 (3/4” × 7/16”) - 11 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 32H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
9.06€ excl. VAT
10.97€ incl. VAT
12B-1-12-NKZ/D19 (3/4” × 7/16”) - 12 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 19H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
10.58€ excl. VAT
12.81€ incl. VAT
12B-1-12-NKZ/D20 (3/4” × 7/16”) - 12 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 20H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
10.58€ excl. VAT
12.81€ incl. VAT
12B-1-12-NKZ/D22 (3/4” × 7/16”) - 12 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 22H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
10.58€ excl. VAT
12.81€ incl. VAT
12B-1-12-NKZ/D24 (3/4” × 7/16”) - 12 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 24H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
10.58€ excl. VAT
12.81€ incl. VAT
12B-1-12-NKZ/D25 (3/4” × 7/16”) - 12 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 25H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
10.58€ excl. VAT
12.81€ incl. VAT
12B-1-12-NKZ/D28 (3/4” × 7/16”) - 12 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 28H7, Keyway (Steel)
Sprocket
At Supplier
Within 2 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
10.58€ excl. VAT
12.81€ incl. VAT
Products are sorted by name in ascending order.
Sprockets Fields of Use
12B sprockets with a finished bore, hub, and hardened teeth for DIN 8187 roller chains are designed for a wide range of industrial applications – from light to heavy industry.
They are most commonly used in power transmission systems, but they also find applications in lifting and material transport systems. Typical fields of use include conveyors, food processing machines, and glassmaking equipment, as well as many other industrial applications.
Sprockets Material
C45E steel (according to UNI EN 10083-1).
Sprockets Code Description
Example:
12B-1-20-NKZ/D32 (3/4″ × 7/16″) - 20 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 32H7, Keyway (Steel)
| Code Part | Description |
|---|---|
| 12B |
Chain type |
| 1 |
Simplex design |
| 20 |
Number of teeth |
| NKZ/D |
Design with hub, hardened teeth, 2 threads with screws, and finished bore |
| 32 |
Finished bore diameter (in mm) |
| 5/8″ × 3/8″ |
Pitch (in inches) × inner width (in inches) |
| 20 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 32H7, 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)
Related Products
12B Sprockets with Hub for DIN 8187 Roller Chains (B-Series)
INOX – Stainless SteelHigh-alloy steel with increased resistance to chemical and electrochemical corrosion.
Suitable especially for the food, chemical and pharmaceutical industries, demanding operating conditions and the outdoor environment, but also for all applications where the use of corrosion-resistant materials is required by law.
Stainless Steel Sprockets with Hub for DIN 8187 Roller Chains (B-Series)
For DIN 8187 roller chains (06B, 08B, 10B, 12B, 16B). In simplex design with a hub or custom-made types.
12B Roller Chains According to DIN 8187
Universal Chain Tensioners
Sliding blocks, sprockets with screw and idler sprockets for tensioning of industrial roller chains during operation.
