Dimensions tab (Thread)

Use the Dimensions tab to edit the dimensions of a Thread feature.

Type — Select ID for an inner diameter thread or OD for an outer diameter thread, or select Curve to create the Thread from a curve.

Custom — Enter the thread dimensions.

Standard Thread — Select this option, then select a thread standard and size from the lists to use standard dimensions.

Thread path from curve — Select this option to enable you to use a curve to define the path of the thread feature. Click the Curve button to display the Select Curve dialog and select the curve you want to use.

Thread — Select a Left hand or Right hand thread. When viewed from the end of the part toward the chuck, on a left hand thread the tool winds counter-clockwise as it moves towards the chuck, on a right hand thread the tool winds clockwise as it moves towards the chuck.

Thread Length — Enter the length of the thread.

Pitch — Enter the pitch of the thread.

Thread Height — Enter the height of the thread.

Minor/Major Diameter — Enter the Minor Diameter for an ID feature or the Major Diameter for an OD feature.

Tapered — If your thread is tapered, select this option and enter the taper Angle, measured clockwise from horizontal.

Angle

Note: Tapered taps are driven to a different depth than straight taps. For straight taps, a tip allowance is added to the thread depth so that the tool cuts the complete thread, this is not added for tapered taps so that the OD is not affected.
Note: There are two ways that FeatureCAM can calculate Standard Threads. Set the Thread depth calculations attribute on the Threading page of the Machining Attributes dialog.