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Pulley Types
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2F – Two Flanges
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0F – No Flanges
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V-Guides
For wider belts, and larger pulleys without flanges, one of the following V-guides is recommended for improved tracking:
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For Metric Pitch Belts
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Standard Keyway Dimensions and Tolerances
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Imperial Shaft Diameter |
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Over |
Up to and Including |
Width wk |
Tolerance wk |
Depth hk |
Tolerance hk |
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0.438 |
0.094 |
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0.047 |
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0.438 |
0.563 |
0.125 |
+0.003 |
0.063 |
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0.563 |
0.875 |
0.188 |
-0.0000 |
0.094 |
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0.875 |
1.250 |
0.250 |
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0.125 |
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1.250 |
1.375 |
0.313 |
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0.156 |
+0.015 |
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1.375 |
1.750 |
0.375 |
+0.0035 |
0.188 |
-0 |
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1.750 |
2.250 |
0.500 |
-0 |
0.250 |
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2.250 |
2.750 |
0.625 |
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0.313 |
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2.750 |
3.250 |
0.750 |
+0.004 |
0.375 |
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3.250 |
3.750 |
0.875 |
-0 |
0.438 |
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3.750 |
4.500 |
1.000 |
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0.500 |
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4.500 |
5.500 |
1.125 |
+0.005 |
0.625 |
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5.500 |
6.500 |
1.500 |
-0 |
0.750 |
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Metric Shaft Diameter |
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Over |
Up to and Including |
Width b |
Tolerance on b |
Depth t2 |
Tolerance t2 |
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6 |
8 |
2 |
+0.06 |
1.0 |
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8 |
10 |
3 |
+0.02 |
1.4 |
+0.1 |
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10 |
12 |
4 |
+0.078 |
1.8 |
-0 |
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12 |
17 |
5 |
+0.03 |
2.3 |
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17 |
22 |
6 |
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2.8 |
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22 |
30 |
8 |
+0.098 |
3.3 |
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30 |
38 |
10 |
+0.04 |
3.3 |
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38 |
44 |
12 |
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3.3 |
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44 |
50 |
14 |
+0.12 |
3.8 |
+0.2 |
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50 |
58 |
16 |
+0.05 |
4.3 |
-0 |
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58 |
65 |
18 |
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4.4 |
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65 |
75 |
20 |
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4.9 |
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75 |
85 |
22 |
+0.149 |
5.4 |
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85 |
95 |
25 |
+0.065 |
5.4 |
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95 |
110 |
28 |
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6.4 |
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110 |
130 |
32 |
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7.4 |
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130 |
150 |
36 |
+0.18 |
8.4 |
+0.3 |
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150 |
170 |
40 |
+0.08 |
9.4 |
-0 |
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* Metric keyway depths are specified from the bottom of the keyway to a line tangent to the bore at the keyway centerline. |
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T=Bore Diameter + t2 |
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