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12B3 - 3/4inch Triplex Chain Sprockets
Transmissions Chain Sprockets Pilot Bore Sprockets 3/4inch Pitch (12B1, 12B2, 12B3) Pilot Bore Sprockets
We are a leading supplier of 12B3 3/4inch pitch Triplex chain sprockets, designed for heavy-duty power transmission applications requiring increased load capacity and reliability. These British standard pilot bore sprockets feature a triplex (three-row) configuration, making them ideal for industrial machinery, conveyor systems, and equipment where smooth, efficient power transfer is essential. Our comprehensive range includes 36 different specifications with tooth counts ranging from 8 to 76 teeth, boss diameters from 31mm to 140mm, and outside diameters spanning 57.6mm to 469.9mm, ensuring you can find the perfect sprocket for your specific application requirements. All our 12B3 sprockets are manufactured to exacting standards by Medway and feature a pilot bore design, allowing for custom machining to fit your exact shaft dimensions. Whether you need a compact 8-tooth sprocket or a large 76-tooth option, our UK-based warehouse stocks the full range ready for quick dispatch. Please contact our technical team if you need assistance selecting the correct sprocket for your chain drive system.
Boss Dia
100mm
100mm
Number of Teeth
20
20
Outside Dia
129.7mm
129.7mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
65mm
65mm
Number of Teeth
14
14
Outside Dia
93.6mm
93.6mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
120mm
120mm
Number of Teeth
28
28
Outside Dia
178mm
178mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
71mm
71mm
Number of Teeth
15
15
Outside Dia
99.8mm
99.8mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
59mm
59mm
Number of Teeth
13
13
Outside Dia
87.5mm
87.5mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
42mm
42mm
Number of Teeth
10
10
Outside Dia
69mm
69mm
Overall Length
65mm
65mm
Pitch
3/4inch
3/4inch
Boss Dia
77mm
77mm
Number of Teeth
16
16
Outside Dia
105.5mm
105.5mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
31mm
31mm
Number of Teeth
8
8
Outside Dia
57.6mm
57.6mm
Overall Length
65mm
65mm
Pitch
3/4inch
3/4inch
Boss Dia
83mm
83mm
Number of Teeth
17
17
Outside Dia
111.5mm
111.5mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
130mm
130mm
Number of Teeth
38
38
Outside Dia
239mm
239mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
100mm
100mm
Number of Teeth
21
21
Outside Dia
136mm
136mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
89mm
89mm
Number of Teeth
18
18
Outside Dia
118mm
118mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
140mm
140mm
Number of Teeth
45
45
Outside Dia
282.5mm
282.5mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
120mm
120mm
Number of Teeth
30
30
Outside Dia
190.5mm
190.5mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
130mm
130mm
Number of Teeth
34
34
Outside Dia
214.6mm
214.6mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
130mm
130mm
Number of Teeth
33
33
Outside Dia
209.3mm
209.3mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
130mm
130mm
Number of Teeth
35
35
Outside Dia
221mm
221mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
120mm
120mm
Number of Teeth
26
26
Outside Dia
165.9mm
165.9mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
130mm
130mm
Number of Teeth
36
36
Outside Dia
226.8mm
226.8mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
130mm
130mm
Number of Teeth
37
37
Outside Dia
232.9mm
232.9mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
130mm
130mm
Number of Teeth
39
39
Outside Dia
245.1mm
245.1mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
130mm
130mm
Number of Teeth
40
40
Outside Dia
251.3mm
251.3mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
140mm
140mm
Number of Teeth
57
57
Outside Dia
355.4mm
355.4mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
140mm
140mm
Number of Teeth
76
76
Outside Dia
469.9mm
469.9mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
130mm
130mm
Number of Teeth
32
32
Outside Dia
203.3mm
203.3mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
130mm
130mm
Number of Teeth
31
31
Outside Dia
196.3mm
196.3mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
120mm
120mm
Number of Teeth
29
29
Outside Dia
184.1mm
184.1mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
120mm
120mm
Number of Teeth
27
27
Outside Dia
172.3mm
172.3mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
120mm
120mm
Number of Teeth
25
25
Outside Dia
160mm
160mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
110mm
110mm
Number of Teeth
24
24
Outside Dia
153.9mm
153.9mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
110mm
110mm
Number of Teeth
23
23
Outside Dia
149mm
149mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
100mm
100mm
Number of Teeth
22
22
Outside Dia
141.8mm
141.8mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
53mm
53mm
Number of Teeth
12
12
Outside Dia
81.5mm
81.5mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
47mm
47mm
Number of Teeth
11
11
Outside Dia
75mm
75mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
Boss Dia
37mm
37mm
Number of Teeth
9
9
Outside Dia
62mm
62mm
Overall Length
65mm
65mm
Pitch
3/4inch
3/4inch
Boss Dia
95mm
95mm
Number of Teeth
19
19
Outside Dia
124.2mm
124.2mm
Overall Length
70mm
70mm
Pitch
3/4inch
3/4inch
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