iPart Threads Reference

Autodesk Inventor includes the Thread.xls spreadsheet in the Design Data folder.

The Application Options or project settings can affect the file's location. The column headings match the labels on the Specification tab of the Thread feature dialog. If you prefer, you can use the spreadsheet to create or edit thread parameters included in an iPart factory.

In the iPart Author dialog, you can specify thread parameters for each iPart member. Define columns for each regular or tapered thread parameter. Include all parameters that vary to match the replacement thread. For example:

Existing thread

Thread1:Family="ANSI Unified Screw Threads" Thread1:Designation="7/16-14 UNC"

Replacement thread

Thread1:Family="ANSI Unified Screw Threads" Thread1:Designation="7/16-18 UNS"

In most cases, this iPart would fail because the Thread1:Class was not added to the table. In the existing thread, three classes are available: 1A, 2A, and 3A. In the replacement thread, only 2A is available. Unless the specified thread is a complete match (both are 2A), it fails because a thread feature cannot be generated.

In this case, select the Class parameter in addition to Family and Designation to prevent this error.

Existing thread

Thread1:Family="ANSI Unified Screw Threads" Thread1:Designation="7/16-14 UNC" Thread1:style-class="1A"

Replacement thread

Thread1:Family="ANSI Unified Screw Threads" Thread1:Designation="7/16-18 UNS" Thread1:style-class="2A"