About Sizing Belts
More
AT Series Timing Belt Pulleys
Made of aluminum, these pulleys have good corrosion resistance. The teeth match up with the grooves along the inside diameter of a timing belt in order to move components forward or backward. Select a pulley with a maximum belt width that’s the same or larger than your timing belt width. Choose pulleys that have a diameter to match your shaft. Pulleys without a shaft diameter have a pilot bore, so you can customize them to your needs.





OD, mm | Number of Teeth | Pitch, mm | For Shaft Dia., mm | Bore Type | Inside Wd., mm | Outside Wd., mm | Overall Wd., mm | Pitch Dia., mm | Number of Flanges | Fabrication | Material | Hub Dia., mm | Each | |
For 10 mm Max. Belt Wd. | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
23 | 12 | 5 | __ | Plain | 10 | 15 | 21 | 19.25 | 2 | Machined | Aluminum | 11 | 0000000 | 000000 |
28 | 15 | 5 | __ | Plain | 10 | 15 | 21 | 24.05 | 2 | Machined | Aluminum | 16 | 0000000 | 00000 |
36 | 20 | 5 | __ | Plain | 10 | 15 | 21 | 32 | 2 | Machined | Aluminum | 23 | 0000000 | 00000 |
38 | 22 | 5 | __ | Plain | 10 | 15 | 21 | 35.25 | 2 | Machined | Aluminum | 24 | 0000000 | 00000 |
42 | 24 | 5 | __ | Plain | 10 | 15 | 21 | 38.4 | 2 | Machined | Aluminum | 26 | 0000000 | 00000 |
48 | 27 | 5 | __ | Plain | 10 | 15 | 21 | 43.2 | 2 | Machined | Aluminum | 30 | 0000000 | 00000 |
51 | 30 | 5 | 8 | Plain | 10 | 15 | 21 | 47.95 | 2 | Machined | Aluminum | 34 | 0000000 | 00000 |
70 | 42 | 5 | 8 | Plain | 10 | 15 | 21 | 67 | 2 | Machined | Aluminum | 40 | 0000000 | 00000 |
94.25 | 60 | 5 | 8 | Plain | __ | 15 | 21 | 95.65 | __ | Machined | Aluminum | 65 | 0000000 | 00000 |
For 16 mm Max. Belt Wd. | ||||||||||||||
23 | 12 | 5 | __ | Plain | 16 | 21 | 27 | 19.25 | 2 | Machined | Aluminum | 11 | 0000000 | 00000 |
32 | 18 | 5 | __ | Plain | 16 | 21 | 27 | 28.8 | 2 | Machined | Aluminum | 20 | 0000000 | 00000 |
36 | 20 | 5 | __ | Plain | 16 | 21 | 27 | 32 | 2 | Machined | Aluminum | 23 | 0000000 | 00000 |
38 | 22 | 5 | __ | Plain | 16 | 21 | 27 | 35.25 | 2 | Machined | Aluminum | 24 | 0000000 | 00000 |
42 | 24 | 5 | __ | Plain | 16 | 21 | 27 | 38.4 | 2 | Machined | Aluminum | 26 | 0000000 | 00000 |
44 | 25 | 5 | __ | Plain | 16 | 21 | 27 | 40 | 2 | Machined | Aluminum | 26 | 0000000 | 00000 |
44 | 26 | 5 | __ | Plain | 16 | 21 | 27 | 41.6 | 2 | Machined | Aluminum | 26 | 0000000 | 00000 |
48 | 27 | 5 | 8 | Plain | 16 | 21 | 27 | 43.2 | 2 | Machined | Aluminum | 30 | 0000000 | 00000 |
48 | 28 | 5 | 8 | Plain | 16 | 21 | 27 | 44.75 | 2 | Machined | Aluminum | 32 | 0000000 | 00000 |
51 | 30 | 5 | 8 | Plain | 16 | 21 | 27 | 47.95 | 2 | Machined | Aluminum | 34 | 0000000 | 00000 |
54 | 32 | 5 | 8 | Plain | 16 | 21 | 27 | 51.1 | 2 | Machined | Aluminum | 38 | 0000000 | 00000 |
60 | 18 | 10 | 10 | Plain | 18 | 22 | 31 | 57.3 | 2 | Machined | Aluminum | 40 | 00000000 | 00000 |
64 | 36 | 5 | 8 | Plain | 16 | 21 | 27 | 57.45 | 2 | Machined | Aluminum | 38 | 0000000 | 00000 |
66 | 20 | 10 | 12 | Plain | 18 | 22 | 31 | 63.7 | 2 | Machined | Aluminum | 46 | 00000000 | 00000 |
66 | 40 | 5 | 8 | Plain | 16 | 21 | 27 | 63.85 | 2 | Machined | Aluminum | 40 | 0000000 | 00000 |
68.8 | 44 | 5 | 8 | Plain | __ | 21 | 27 | 70.2 | __ | Machined | Aluminum | 45 | 0000000 | 00000 |
70 | 42 | 5 | 8 | Plain | 16 | 21 | 27 | 67 | 2 | Machined | Aluminum | 40 | 0000000 | 00000 |
75 | 22 | 10 | 12 | Plain | 18 | 22 | 31 | 70 | 2 | Machined | Aluminum | 50 | 00000000 | 00000 |
83 | 24 | 10 | 12 | Plain | 18 | 22 | 31 | 76.4 | 2 | Machined | Aluminum | 58 | 00000000 | 00000 |
83 | 25 | 10 | 12 | Plain | 18 | 22 | 31 | 79.6 | 2 | Machined | Aluminum | 60 | 00000000 | 00000 |
91 | 27 | 10 | 12 | Plain | 18 | 22 | 31 | 86 | 2 | Machined | Aluminum | 60 | 00000000 | 00000 |
94.25 | 60 | 5 | 8 | Plain | __ | 21 | 27 | 95.65 | __ | Machined | Aluminum | 65 | 0000000 | 000000 |
97 | 30 | 10 | 12 | Plain | 18 | 22 | 31 | 95.5 | 2 | Machined | Aluminum | 60 | 00000000 | 00000 |
106 | 32 | 10 | 12 | Plain | 18 | 22 | 31 | 101.9 | 2 | Machined | Aluminum | 65 | 00000000 | 000000 |
119 | 36 | 10 | 16 | Plain | 18 | 22 | 31 | 114.6 | 2 | Machined | Aluminum | 70 | 00000000 | 000000 |
131 | 40 | 10 | 16 | Plain | 18 | 22 | 31 | 127.3 | 2 | Machined | Aluminum | 80 | 00000000 | 000000 |
138.2 | 44 | 10 | 16 | Plain | 18 | 22 | 31 | 140.1 | 2 | Machined | Aluminum | 90 | 00000000 | 000000 |
151 | 48 | 10 | 16 | Plain | __ | 22 | 31 | 152.8 | __ | Machined | Aluminum | 95 | 00000000 | 000000 |
189.1 | 60 | 10 | 16 | Plain | __ | 22 | 31 | 191 | __ | Machined | Aluminum | 110 | 00000000 | 000000 |
For 25 mm Max. Belt Wd. | ||||||||||||||
32 | 16 | 5 | __ | Plain | 25 | 30 | 36 | 25.6 | 2 | Machined | Aluminum | 18 | 0000000 | 00000 |
36 | 20 | 5 | __ | Plain | 25 | 30 | 36 | 32 | 2 | Machined | Aluminum | 23 | 0000000 | 00000 |
38 | 22 | 5 | __ | Plain | 25 | 30 | 36 | 35.25 | 2 | Machined | Aluminum | 24 | 0000000 | 00000 |
42 | 24 | 5 | __ | Plain | 25 | 30 | 36 | 38.4 | 2 | Machined | Aluminum | 26 | 0000000 | 00000 |
44 | 25 | 5 | __ | Plain | 25 | 30 | 36 | 40 | 2 | Machined | Aluminum | 26 | 0000000 | 00000 |
44 | 26 | 5 | __ | Plain | 25 | 30 | 36 | 41.6 | 2 | Machined | Aluminum | 26 | 0000000 | 00000 |
48 | 27 | 5 | 8 | Plain | 25 | 30 | 36 | 43.2 | 2 | Machined | Aluminum | 30 | 0000000 | 00000 |
51 | 30 | 5 | 8 | Plain | 25 | 30 | 36 | 47.95 | 2 | Machined | Aluminum | 34 | 0000000 | 00000 |
54 | 32 | 5 | 8 | Plain | 25 | 30 | 36 | 51.1 | 2 | Machined | Aluminum | 38 | 0000000 | 00000 |
60.3 | 18 | 10 | 10 | Plain | 28 | 32 | 42 | 57.29 | 2 | Machined | Aluminum | 40 | 0000000 | 00000 |
66.5 | 40 | 5 | 8 | Plain | 25 | 30 | 36 | 63.85 | 2 | Machined | Aluminum | 40 | 0000000 | 00000 |
66.7 | 20 | 10 | 12 | Plain | 28 | 32 | 42 | 63.65 | 2 | Machined | Aluminum | 46 | 0000000 | 00000 |
75 | 22 | 10 | 12 | Plain | 28 | 32 | 42 | 70.03 | 2 | Machined | Aluminum | 50 | 0000000 | 00000 |
75.15 | 48 | 5 | 8 | Plain | __ | 30 | 36 | 76.55 | __ | Machined | Aluminum | 50 | 0000000 | 000000 |
83 | 24 | 10 | 12 | Plain | 28 | 32 | 42 | 76.39 | 2 | Machined | Aluminum | 58 | 0000000 | 00000 |
83 | 25 | 10 | 12 | Plain | 28 | 32 | 42 | 79.58 | 2 | Machined | Aluminum | 60 | 0000000 | 00000 |
90.6 | 27 | 10 | 12 | Plain | 28 | 32 | 42 | 85.95 | 2 | Machined | Aluminum | 60 | 0000000 | 00000 |
97 | 30 | 10 | 12 | Plain | 28 | 32 | 42 | 95.49 | 2 | Machined | Aluminum | 60 | 0000000 | 00000 |
106 | 32 | 10 | 12 | Plain | 28 | 32 | 42 | 101.86 | 2 | Machined | Aluminum | 65 | 0000000 | 00000 |
118.26 | 36 | 10 | 16 | Plain | 28 | 32 | 42 | 114.59 | 2 | Machined | Aluminum | 70 | 0000000 | 000000 |
131 | 40 | 10 | 16 | Plain | 28 | 32 | 42 | 127.32 | 2 | Machined | Aluminum | 80 | 0000000 | 000000 |
144 | 44 | 10 | 16 | Plain | 28 | 32 | 42 | 140.05 | 2 | Machined | Aluminum | 90 | 0000000 | 000000 |
150.95 | 48 | 10 | 16 | Plain | __ | 32 | 42 | 152.78 | __ | Machined | Aluminum | 95 | 0000000 | 000000 |
189.1 | 60 | 10 | 16 | Plain | __ | 32 | 42 | 190.98 | __ | Machined | Aluminum | 110 | 0000000 | 000000 |
For 50 mm Max. Belt Wd. | ||||||||||||||
60 | 18 | 10 | 10 | Plain | 53 | 57 | 66 | 57.3 | 2 | Machined | Aluminum | 40 | 00000000 | 00000 |
66 | 20 | 10 | 12 | Plain | 53 | 57 | 66 | 63.7 | 2 | Machined | Aluminum | 46 | 00000000 | 000000 |
75 | 22 | 10 | 12 | Plain | 53 | 57 | 66 | 70 | 2 | Machined | Aluminum | 50 | 00000000 | 000000 |
83 | 24 | 10 | 12 | Plain | 53 | 57 | 66 | 76.4 | 2 | Machined | Aluminum | 58 | 00000000 | 000000 |
83 | 25 | 10 | 12 | Plain | 53 | 57 | 66 | 79.6 | 2 | Machined | Aluminum | 60 | 00000000 | 000000 |
91 | 27 | 10 | 12 | Plain | 53 | 57 | 66 | 86 | 2 | Machined | Aluminum | 60 | 00000000 | 000000 |
97 | 30 | 10 | 12 | Plain | 53 | 57 | 66 | 95.5 | 2 | Machined | Aluminum | 60 | 00000000 | 000000 |
106 | 32 | 10 | 12 | Plain | 53 | 57 | 66 | 101.9 | 2 | Machined | Aluminum | 65 | 00000000 | 000000 |
119 | 36 | 10 | 16 | Plain | 53 | 57 | 66 | 114.6 | 2 | Machined | Aluminum | 70 | 00000000 | 000000 |
131 | 40 | 10 | 16 | Plain | 53 | 57 | 66 | 127.3 | 2 | Machined | Aluminum | 80 | 00000000 | 000000 |
138.2 | 44 | 10 | 16 | Plain | 53 | 57 | 66 | 140.1 | 2 | Machined | Aluminum | 90 | 00000000 | 000000 |
151 | 48 | 10 | 16 | Plain | __ | 57 | 66 | 152.8 | __ | Machined | Aluminum | 95 | 00000000 | 000000 |
189.1 | 60 | 10 | 16 | Plain | __ | 57 | 66 | 191 | __ | Machined | Aluminum | 110 | 00000000 | 000000 |
AT Series Dust-Free Timing Belts


Made of urethane, these belts have excellent abrasion resistance, so they don’t create dust while they run. They’re reinforced with steel for very high strength, low stretch, and excellent shock resistance. All have trapezoidal teeth.
Belt Trade Number | Outer Circle, mm | Number of Teeth | Pitch, mm | Material | Color | Temperature Range, °F | Each | |
10 mm Wd. | ||||||||
---|---|---|---|---|---|---|---|---|
10AT5/300 | 300 | 60 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 000000 |
10AT5/340 | 340 | 68 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
10AT5/375 | 375 | 75 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
10AT5/390 | 390 | 78 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
10AT5/420 | 420 | 84 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
10AT5/450 | 450 | 90 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
10AT5/455 | 455 | 91 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
10AT5/480 | 480 | 96 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
10AT5/500 | 500 | 100 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
10AT5/525 | 525 | 105 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
10AT5/545 | 545 | 109 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
10AT5/600 | 600 | 120 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16 mm Wd. | ||||||||
16AT5/300 | 300 | 60 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT5/375 | 375 | 75 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT5/390 | 390 | 78 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT5/420 | 420 | 84 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT5/450 | 450 | 90 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT5/455 | 455 | 91 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT5/480 | 480 | 96 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT5/525 | 525 | 105 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT5/545 | 545 | 109 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT5/600 | 600 | 120 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT10/500 | 500 | 50 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT10/560 | 560 | 56 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT10/660 | 660 | 66 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT10/700 | 700 | 70 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT10/780 | 780 | 78 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT10/800 | 800 | 80 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT10/840 | 840 | 84 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
16AT10/890 | 890 | 89 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25 mm Wd. | ||||||||
25AT5/300 | 300 | 60 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT5/375 | 375 | 75 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT5/390 | 390 | 78 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT5/420 | 420 | 84 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT5/450 | 450 | 90 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT5/455 | 455 | 91 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT5/480 | 480 | 96 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT5/525 | 525 | 105 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT5/545 | 545 | 109 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT5/600 | 600 | 120 | 5 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT10/500 | 500 | 50 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT10/560 | 560 | 56 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT10/660 | 660 | 66 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT10/700 | 700 | 70 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT10/780 | 780 | 78 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT10/800 | 800 | 80 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT10/840 | 840 | 84 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
25AT10/890 | 890 | 89 | 10 | Urethane | Gray | -20° to 175° | 0000000 | 00000 |
AT Series Dust-Free Cut-to-Length Timing Belts


Urethane has excellent abrasion resistance, so these belts don’t create dust while they run. They have steel reinforcement, which has very high strength, low stretch, and excellent shock resistance.
Secure belt ends to a flat surface with end plates.