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12B-1 finished bore sprockets

12B-1 finished bore sprockets are simplex hub sprockets for 12B-1 chain of 3/4" (19.05 mm) pitch to DIN 8187 / ISO 606. They have a bored shaft hole and a cut keyway.

12B-1 finished bore sprockets for agricultural machinery and conveyors

12B drives work in agricultural machinery, scraper conveyors, presses and construction machinery, where the sprockets are already quite heavy and machining them takes more time. A finished bore sprocket saves this work - you fit it on a keyed shaft and the drive is running again.

12B-1 sprockets in C45 steel with bore and key

12B-1 simplex sprockets in C45 steel with bores of various diameters - the D value is given in the product name. The largest bores are available on sprockets with more teeth, which have a more massive hub.

Why large bores only on larger 12B-1 sprockets - questions

Why are large bores only available on larger sprockets?

The bore and keyway must fit in the hub while keeping a safe wall thickness. A sprocket with fewer teeth has a smaller hub, so its maximum bore is also smaller.

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Sprocket 12B-1 (3/4") z=16 with hub, bore 28 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=16 with hub, bore 28 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 28 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 28 mm with keyway, C45 steel.
Weight
1,35 kg
In Stock
251
In Stock:
251

18,21 €

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Sprocket 12B-1 (3/4") z=16 with hub, bore 30 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=16 with hub, bore 30 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 30 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 30 mm with keyway, C45 steel.
Weight
1,35 kg
In Stock
819
In Stock:
819

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Sprocket 12B-1 (3/4") z=16 with hub, bore 32 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=16 with hub, bore 32 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 32 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 32 mm with keyway, C45 steel.
Weight
1,35 kg
In Stock
95
In Stock:
95

18,21 €

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Sprocket 12B-1 (3/4") z=16 with hub, bore 35 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=16 with hub, bore 35 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 35 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 35 mm with keyway, C45 steel.
Weight
1,35 kg
In Stock
524
In Stock:
524

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Sprocket 12B-1 (3/4") z=16 with hub, bore 38 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=16 with hub, bore 38 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 38 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 38 mm with keyway, C45 steel.
Weight
1,35 kg
In Stock
71
In Stock:
71

18,21 €

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Sprocket 12B-1 (3/4") z=16 with hub, bore 40 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=16 with hub, bore 40 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 40 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 16 teeth, pitch 19.05 mm (3/4"), finished bore 40 mm with keyway, C45 steel.
Weight
1,35 kg
In Stock
429
In Stock:
429

18,21 €

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Sprocket 12B-1 (3/4") z=17 with hub, bore 25 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=17 with hub, bore 25 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 25 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 25 mm with keyway, C45 steel.
Weight
1,54 kg
In Stock
340
In Stock:
340

19,96 €

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Sprocket 12B-1 (3/4") z=17 with hub, bore 28 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=17 with hub, bore 28 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 28 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 28 mm with keyway, C45 steel.
Weight
1,54 kg
In Stock
114
In Stock:
114

19,96 €

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Sprocket 12B-1 (3/4") z=17 with hub, bore 30 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=17 with hub, bore 30 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 30 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 30 mm with keyway, C45 steel.
Weight
1,54 kg
In Stock
357
In Stock:
357

19,96 €

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Sprocket 12B-1 (3/4") z=17 with hub, bore 32 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=17 with hub, bore 32 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 32 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 32 mm with keyway, C45 steel.
Weight
1,54 kg
In Stock
45
In Stock:
45

19,96 €

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Sprocket 12B-1 (3/4") z=17 with hub, bore 35 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=17 with hub, bore 35 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 35 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 35 mm with keyway, C45 steel.
Weight
1,54 kg
In Stock
855
In Stock:
855

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Sprocket 12B-1 (3/4") z=17 with hub, bore 38 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=17 with hub, bore 38 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 38 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 38 mm with keyway, C45 steel.
Weight
1,54 kg
In Stock
100
In Stock:
100

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Sprocket 12B-1 (3/4") z=17 with hub, bore 40 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=17 with hub, bore 40 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 40 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 40 mm with keyway, C45 steel.
Weight
1,54 kg
In Stock
615
In Stock:
615

19,96 €

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Sprocket 12B-1 (3/4") z=17 with hub, bore 42 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=17 with hub, bore 42 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 42 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 17 teeth, pitch 19.05 mm (3/4"), finished bore 42 mm with keyway, C45 steel.
Weight
1,54 kg
In Stock
58
In Stock:
58

19,96 €

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Sprocket 12B-1 (3/4") z=18 with hub, bore 25 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=18 with hub, bore 25 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 25 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 25 mm with keyway, C45 steel.
Weight
1,65 kg
In Stock
89
In Stock:
89

21,02 €

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Sprocket 12B-1 (3/4") z=18 with hub, bore 28 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=18 with hub, bore 28 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 28 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 28 mm with keyway, C45 steel.
Weight
1,65 kg
In Stock
237
In Stock:
237

21,02 €

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Sprocket 12B-1 (3/4") z=18 with hub, bore 30 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=18 with hub, bore 30 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 30 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 30 mm with keyway, C45 steel.
Weight
1,65 kg
In Stock
245
In Stock:
245

21,02 €

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Sprocket 12B-1 (3/4") z=18 with hub, bore 32 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=18 with hub, bore 32 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 32 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 32 mm with keyway, C45 steel.
Weight
1,65 kg
In Stock
138
In Stock:
138

21,02 €

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Sprocket 12B-1 (3/4") z=18 with hub, bore 35 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=18 with hub, bore 35 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 35 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 35 mm with keyway, C45 steel.
Weight
1,65 kg
In Stock
218
In Stock:
218

21,02 €

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Sprocket 12B-1 (3/4") z=18 with hub, bore 38 mm with keyway, C45 steel

Sprocket 12B-1 (3/4") z=18 with hub, bore 38 mm with keyway, C45 steel

Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 38 mm with keyway, C45 steel.
Sprocket with hub for chain 12B-1, 18 teeth, pitch 19.05 mm (3/4"), finished bore 38 mm with keyway, C45 steel.
Weight
1,65 kg
In Stock
134
In Stock:
134

21,02 €

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