Non standad metric threads, updated 11.03.2022
Fusion360
For a project it was needed to have a 8.3 x 1 mm thread on a part. The Fusion 360 thread menu on the ISO Metric profile tab does not have the posibility to change the diameter!
The profile itself is written down in the ISOMetricprofile.xml which can be found in the ThreadData folder and looks like following:
<?xml version="1.0" encoding="UTF-8"?>
<ThreadType>
<Name>ISO Metric profile</Name>
<CustomName>ISO Metric Profile</CustomName>
<Unit>mm</Unit>
<Angle>60</Angle>
<SortOrder>3</SortOrder>
<ThreadSize>
<Size>0.25</Size>
<Designation>
<ThreadDesignation>M0.25x0.075</ThreadDesignation>
<CTD>M0.25x0.075</CTD>
<Pitch>0.075</Pitch>
<Thread>
<Gender>external</Gender>
<Class>6g</Class>
<MajorDia>0.2425</MajorDia>
<PitchDia>0.194</PitchDia>
<MinorDia>0.15</MinorDia>
</Thread>
<Thread>
<Gender>internal</Gender>
<Class>6H</Class>
<MajorDia>0.2655</MajorDia>
<PitchDia>0.208</PitchDia>
<MinorDia>0.19</MinorDia>
<TapDrill>0.175</TapDrill>
</Thread>
<Thread>
<Gender>external</Gender>
<Class>4g6g</Class>
<MajorDia>0.2425</MajorDia>
<PitchDia>0.197</PitchDia>
<MinorDia>0.156</MinorDia>
</Thread>
</Designation>
</ThreadSize>..........
..........
For the 8.3 x 1 mm thread I searched the 8.0 x 1 mm entry copied and pasted it and changed the relevant data by 0.3 mm and saved the file.
<ThreadSize>
<Size>8.0</Size>
<Designation><ThreadDesignation>M8x1</ThreadDesignation>
<CTD>M8x1</CTD>
<Pitch>1.0</Pitch>
<Thread>
<Gender>external</Gender>
<Class>6g</Class>
<MajorDia>7.884</MajorDia>
<PitchDia>7.268</PitchDia>
<MinorDia>6.7435</MinorDia>
</Thread>
<ThreadSize>
<Size>8.3</Size>
<Designation>
<ThreadDesignation>M8.3x1</ThreadDesignation>
<CTD>M8.3x1</CTD>
<Pitch>1.0</Pitch>
<Thread>
<Gender>external</Gender>
<Class>6g</Class>
<MajorDia>8.184</MajorDia>
<PitchDia>7.568</PitchDia>
<MinorDia>7.0435</MinorDia>
</Thread>
Fusion360 non standard mertic thread