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20B Sprockets with Finished Bore, Hub, and Hardened Teeth for DIN 8187 Roller Chains (B-Series)

20B 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 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.

20B-1-11-NKZ/D35 (1 1/4" × 3/4") - 11 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 35H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

791,80CZK excl. VAT

958,10CZK incl. VAT

20B-1-11-NKZ/D40 (1 1/4" × 3/4") - 11 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 40H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

791,80CZK excl. VAT

958,10CZK incl. VAT

20B-1-12-NKZ/D35 (1 1/4" × 3/4") - 12 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 35H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

974,10CZK excl. VAT

1 178,70CZK incl. VAT

20B-1-12-NKZ/D50 (1 1/4" × 3/4") - 12 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 50H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

974,10CZK excl. VAT

1 178,70CZK incl. VAT

20B-1-13-NKZ/D40 (1 1/4" × 3/4") - 13 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 40H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

1 081,10CZK excl. VAT

1 308,20CZK incl. VAT

20B-1-13-NKZ/D50 (1 1/4" × 3/4") - 13 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 50H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

1 081,10CZK excl. VAT

1 308,20CZK incl. VAT

20B-1-13-NKZ/D60 (1 1/4" × 3/4") - 13 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 60H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

1 081,10CZK excl. VAT

1 308,20CZK incl. VAT

20B-1-14-NKZ/D50 (1 1/4" × 3/4") - 14 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 50H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

1 307,50CZK excl. VAT

1 582,10CZK incl. VAT

20B-1-14-NKZ/D60 (1 1/4" × 3/4") - 14 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 60H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

1 307,50CZK excl. VAT

1 582,10CZK incl. VAT

20B-1-15-NKZ/D40 (1 1/4" × 3/4") - 15 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 40H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

1 486,80CZK excl. VAT

1 799,00CZK incl. VAT

20B-1-15-NKZ/D50 (1 1/4" × 3/4") - 15 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 50H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

1 486,80CZK excl. VAT

1 799,00CZK incl. VAT

20B-1-17-NKZ/D50 (1 1/4" × 3/4") - 17 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 50H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

1 842,50CZK excl. VAT

2 229,40CZK incl. VAT

20B-1-19-NKZ/D50 (1 1/4" × 3/4") - 19 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 50H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

2 087,60CZK excl. VAT

2 526,00CZK incl. VAT

20B-1-19-NKZ/D60 (1 1/4" × 3/4") - 19 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 60H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

2 087,60CZK excl. VAT

2 526,00CZK incl. VAT

20B-1-20-NKZ/D70 (1 1/4" × 3/4") - 20 Teeth, with Hub, Hardened Teeth, 2 Screws, Bore 70H7, Keyway (Steel)

Sprocket with hardened teeth

At Supplier

Within 2 Weeks

2 216,40CZK excl. VAT

2 681,80CZK incl. VAT

Products are sorted by name in ascending order.


Sprockets Fields of Use

Finished sprockets in use

20B 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:
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)

Chains

TYMA CZ Catalogue

Czech (PDF 2.01 MB)

Sprockets and Plate Wheels

TYMA CZ Catalogue

Czech and English (PDF 3.77 MB)


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