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1.1/4inch Pitch (20B1) Simplex Chain sprockets
Transmissions Chain Sprockets Pilot Bore Sprockets
We are a leading supplier of 20B1 - 1.1/4" Pitch Simplex Pilot Bore Sprockets, essential components for power transmission systems in industrial machinery and equipment. These British standard roller chain sprockets are designed to work with 20B1 simplex roller chains, featuring a pilot bore that allows for precise machining to your exact shaft requirements. Our comprehensive range includes 35 different sizes with tooth counts ranging from 8 to 76 teeth, outside diameters from 98.1mm to 783.5mm, and pilot bore sizes of 20mm or 25mm depending on the sprocket size. All sprockets are manufactured to exacting standards and supplied by Medway, a trusted name in power transmission components. Whether you are replacing worn sprockets in conveyor systems, agricultural machinery, or other industrial applications, we stock these items in our UK warehouse for fast delivery. If you need assistance selecting the correct sprocket for your application, please contact our technical team who will be happy to help.
Boss Dia
120mm
120mm
Number of Teeth
18
18
Outside Dia
198mm
198mm
Overall Length
50mm
50mm
Pilot Bore Size
20mm
20mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
88mm
88mm
Number of Teeth
12
12
Outside Dia
137.8mm
137.8mm
Overall Length
45mm
45mm
Pilot Bore Size
20mm
20mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
120mm
120mm
Number of Teeth
19
19
Outside Dia
208.1mm
208.1mm
Overall Length
50mm
50mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
108mm
108mm
Number of Teeth
14
14
Outside Dia
157.8mm
157.8mm
Overall Length
45mm
45mm
Pilot Bore Size
20mm
20mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
118mm
118mm
Number of Teeth
15
15
Outside Dia
167.9mm
167.9mm
Overall Length
45mm
45mm
Pilot Bore Size
20mm
20mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
53mm
53mm
Number of Teeth
8
8
Outside Dia
98.1mm
98.1mm
Overall Length
40mm
40mm
Pilot Bore Size
20mm
20mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
120mm
120mm
Number of Teeth
17
17
Outside Dia
187.9mm
187.9mm
Overall Length
50mm
50mm
Pilot Bore Size
20mm
20mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
70mm
70mm
Number of Teeth
10
10
Outside Dia
117.9mm
117.9mm
Overall Length
40mm
40mm
Pilot Bore Size
20mm
20mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
120mm
120mm
Number of Teeth
16
16
Outside Dia
177.9mm
177.9mm
Overall Length
50mm
50mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
140mm
140mm
Number of Teeth
24
24
Outside Dia
258.4mm
258.4mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
140mm
140mm
Number of Teeth
21
21
Outside Dia
228.2mm
228.2mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
140mm
140mm
Number of Teeth
23
23
Outside Dia
248.3mm
248.3mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
63mm
63mm
Number of Teeth
9
9
Outside Dia
108mm
108mm
Overall Length
40mm
40mm
Pilot Bore Size
20mm
20mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
30
30
Outside Dia
318.9mm
318.9mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
28
28
Outside Dia
298.7mm
298.7mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
38
38
Outside Dia
399.6mm
399.6mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
36
36
Outside Dia
379.5mm
379.5mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
32
32
Outside Dia
339.1mm
339.1mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
33
33
Outside Dia
349.2mm
349.2mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
40
40
Outside Dia
419.8mm
419.8mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
45
45
Outside Dia
470.3mm
470.3mm
Overall Length
70mm
70mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
37
37
Outside Dia
389.5mm
389.5mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
57
57
Outside Dia
591.5mm
591.5mm
Overall Length
80mm
80mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
35
35
Outside Dia
369.4mm
369.4mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
76
76
Outside Dia
783.5mm
783.5mm
Overall Length
80mm
80mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
34
34
Outside Dia
359.3mm
359.3mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
31
31
Outside Dia
329mm
329mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
29
29
Outside Dia
308.8mm
308.8mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
27
27
Outside Dia
288.6mm
288.6mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
150mm
150mm
Number of Teeth
26
26
Outside Dia
278.6mm
278.6mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
140mm
140mm
Number of Teeth
25
25
Outside Dia
268.5mm
268.5mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
77mm
77mm
Number of Teeth
11
11
Outside Dia
127.8mm
127.8mm
Overall Length
45mm
45mm
Pilot Bore Size
20mm
20mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
98mm
98mm
Number of Teeth
13
13
Outside Dia
147.8mm
147.8mm
Overall Length
45mm
45mm
Pilot Bore Size
20mm
20mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
120mm
120mm
Number of Teeth
20
20
Outside Dia
218.1mm
218.1mm
Overall Length
50mm
50mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
Boss Dia
140mm
140mm
Number of Teeth
22
22
Outside Dia
238.3mm
238.3mm
Overall Length
55mm
55mm
Pilot Bore Size
25mm
25mm
Pitch
1.1/4inch
1.1/4inch
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