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20B Taper Lock Sprockets for DIN 8187 Roller Chains (B Series)

20B taper bored sprockets are designed for drives with all types of 20B (1 1/4″ × 3/4″) roller chains of the so-called European series (B-series), standardized to ISO 606 (DIN 8187). They are available in simplex, duplex, and triplex design.

The sprockets are mounted on the shaft using Taper Lock bushes, which ensure a secure and precise fit. Additionally, the keyway provides reliable axial fixation against displacement.

20B-1 Taper Lock Sprockets for DIN 8187 Roller Chains (B Series) - Preview

20B-1 (Simplex)

Taper bored sprockets for DIN 8187 roller chains
Pitch × Internal width (mm): 31.750 × 19.560
Teeth z = 13 - 114
Standard diameters Dp (mm): 132.65 - 1152.26
20B-2 Taper Lock Sprockets for DIN 8187 Roller Chains (B Series) - Preview

20B-2 (Duplex)

Taper bored sprockets for DIN 8187 roller chains
Pitch × Internal width (mm): 31.750 × 19.560
Teeth z = 13 - 114
Standard diameters Dp (mm): 132.65 - 1152.26
20B-3 Taper Lock Sprockets for DIN 8187 Roller Chains (B Series) - Preview

20B-3 (Triplex)

Taper bored sprockets for DIN 8187 roller chains
Pitch × Internal width (mm): 31.750 × 19.560
Teeth z = 15 - 114
Standard diameters Dp (mm): 152.72 - 1152.26

Sprockets Fields of Use

20B (1 1/4″ × 3/4″) taper bored sprockets are designed for general use in light and heavy industry.

They are used in drives, but can also be used for lifting or transporting material.

Sprockets Material

C43 steel or grey cast iron.

Other materials available on request.

Sprockets Code Description

Example:
20B-1-28-T (1 1/4 × 3/4) - 28 Teeth, TB 3020 (Steel)

Code Part Description
20B

Type of chain

1

Simplex design

28

Number of teeth

T

Design with tapered bore (Taper Lock)

1 1/4 × 3/4

Pitch in inches × inner width in inches

28 Teeth, TB 3020 (Steel)

Sprocket design, Taper Lock bush type and material of the sprocket

Documents for Download

Chains - Preview

Chains

TYMA CZ Catalogue

Czech (PDF 2.01 MB)


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