| 1. | The pitch diameter is indicated as Dp in the figure shown above.
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| 2. | There are several methods that are used to measure the pitch diameter.
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| 3. | Truncation is achieved by using a slightly larger pitch diameter is not affected.
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| 4. | It is understood to be at the standard pitch diameter unless otherwise specified.
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| 5. | Hobbing machines are characterised by the largest module or pitch diameter it can generate.
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| 6. | Thread class refers to the acceptable range of pitch diameter for any given thread.
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| 7. | It is understood to be measured at the standard pitch diameter unless otherwise specified.
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| 8. | The endmill should be the pitch diameter.
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| 9. | The term module is understood to mean the pitch diameter in millimeters divided by the number of teeth.
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| 10. | The same involute gear may be used under conditions that change its operating pitch diameter and pressure angle.
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