Thread Milling

IN THIS ARTICLE

• Common parameters
• Internal Thread
• External Thread
• Multi teeth tool

To add an helix thread milling operation , enable the thread operation under the drilling machining screen.

• Define the z levels
• Select the thread family and thread pitch from drop down menu. You can expand this thread list. See "Thread table" article , link at bottom page.
• Select a tool with compatible diameter.

You should get a valid toolpath at this point.

See below for further operation options to customize this machining operation.

Common parameters

Select Tool : You need to choose a thread mill tool. In case of internal thread , is necessary a tool diameter a bit smaller than predrill diameter.

Select Thread Category : Choose the thread family from dropdown field

Threading : Select the thread dimension you need. If you need to add a new row or edit some default data , open thread table and edit related property. To open the thread table you can click on the button at side of this field. Or from menu -> edit -> thread table.

Pitch : It's one of the field that will be defined automatically after choosing thread row. You can edit it manually

External Threading : Check this if you need to create an external threading.

Depth : Thread depth measured from [Start Z] level.

Thread Mode : You can choose between :

1. Right Handed - Climb
2. Right Handed - Conventional
3. Left  Handed - Climb
4. Left  Handed - Conventional

The suggested working method is Climb

Compensation Mode : See related page for more info.

Step Count : For larger thread , it's better create the thread with multiple axial pass.

First Step % : Available when you select for the one pass to create the thread. It indicated the % of material removed from the first pass.

Internal Thread

After selection of thread dimension. All the thread related property are filled with data from thread table.

Diameter : It's the diameter of thread helix. In case of [Computer] or [Tool Wear] compensation . it will be reduced by tool diameter.

Predrill Diameter : It's used as start approach diameter. The tool will reach touch this diameter and then will approach the helix diameter with a arc tangent movement.

External Thread

After selection of thread dimension. All the thread related property are filled with data from thread table.

External Diameter : It's used as start approach diameter. The tool will reach touch this diameter and then will approach the helix diameter with a arc tangent movement.

Inner Diameter: It's the diameter of thread helix. In case of [Computer] or [Tool Wear] compensation . it will be increased by tool diameter.

Multi Teeth Tool

From tool geometry screen , is possible define multiple teeth .

The generated toolpath will be compensated in order to use all the teeth, resulting in shorter toolpath. 

Toolpath created with single tooth tool.

Toolpath created with multiple teeth tool.