About Threaded Holes

The topic provides reference information about threaded holes.

This page discusses:

See Also
Creating Threaded Holes

Thread Standards

The Thread standard box lets you choose any of the following thread types:

  • No Standard
  • Metric Thin Pitch: uses ISO standard values
  • Metric Thick Pitch: uses ISO standard values.
No Standard

If you select No Standard, the following boxes are available:

  • Thread diameter
  • Main diameter
  • Thread depth
  • Main depth
  • Pitch.

You need to enter the values in these boxes.

Note that a number of contextual commands are available from these boxes. For example, Edit formula lets you define formulas for managing diameters values.

Metric Thin Pitch: ISO Standard
See ( ISO 965-2 ). The app uses the minimum standard values.
Nominaldiam Pitch Minordiam
8.0 1.0 6.917
10.0 1.0 8.917
10.0 1.25 8.647
12.0 1.25 10.647
12.0 1.5 10.376
14.0 1.5 12.376
16.0 1.5 14.376
18.0 1.5 16.376
18.0 2.0 15.835
20.0 1.5 18.376
20.0 2.0 17.835
22.0 1.5 20.376
22.0 2.0 19.835
24.0 2.0 21.835
27.0 2.0 24.835
30.0 2.0 27.835
33.0 2.0 30.835
36.0 3.0 32.752
39.0 3.0 35.752
42.0 3.0 38.752
45.0 3.0 41.752
48.0 3.0 44.752
52.0 4.0 47.67
56.0 4.0 51.67
60.0 4.0 55.67
64.0 4.0 59.67
Metric Thick Pitch: ISO Standard
Nominaldiam Pitch Minordiam
1 0.25 0.729
1.2 0.25 0.929
1.4 0.3 1.075
1.6 0.35 1.221
1.8 0.35 1.421
2.0 0.4 1.567
2.5 0.45 2.013
3.0 0.5 2.459
3.5 0.6 2.850
4.0 0.7 3.242
5.0 0.8 4.134
6.0 1.0 4.917
7.0 1.0 5.917
8.0 1.25 4.917
10.0 1.5 8.376
12.0 1.75 8.376
14.0 2.0 11.835
16.0 2.0 11.835
18.0 2.5 11.835
20.0 2.5 17.294
22.0 2.5 19.294
24.0 3.0 20.752
27.0 3.0 23.752
30.0 3.5 23.752
33.0 3.5 23.752
36.0 4.0 31.670
39.0 4.0 34.670
42.0 4.5 37.129
45.0 4.5 40.129
48.0 5.0 42.587
52.0 5.0 46.587
56.0 5.5 50.046
60.0 5.5 54.046
64.0 6.0 57.505
Notes:
  • You can create new standards as per the requirement.
  • You can set new standards using Data Setup.

Reusing Values Already Defined in a File

To use values listed in an xml file, the system administrator must have made the required data available.

If this step has been done, you need to select the file from the Type list, and optionally edit one or more values (Thread Depth and Hole Depth) if needed.

Important:
  • You can modify a standard on the fly. But if the standard has already been used (that is a design table was created) the modification is not taken into account in the Hole.x and Thread.x dialog boxes.
  • While selecting a standard thread type in the Type list:

    • If the diameter of a hole set by you, complies with the thread standards, the related thread description is automatically selected as per the thread standards.

      For example, if you enter 12.376mm in the Main diameter box and then select Metric Thin Pitch as thread type, the related parameter M14X1.5 corresponding to the 12.376mm hole diameter appears in the Thread description box as selected.

    • If the diameter of a hole set by you, does not exist in the standard file, a warning message is displayed and the diameter is set to the first value in the standard file.

      For example, if you enter 15mm in the Main diameter box and then select Metric Thick Pitch as thread type, a warning message appears informing you that the value 15mm does not exist in the selected standard and that the diameters will be set with the first line of the standard.

Thread mode

You can use a planar geometrical element as limiting thread/tap depth element or set the thread depth with the length of the support.

The Thread mode list provides three different options to set depth:

  • Dimension: The depth is set through numerical value in the dialog box using Thread Depth box.
  • Support Depth: The depth of the thread is automatically set to the height of the support.
  • Up-To-Plane: The depth is computed with the selected bottom limit element.

You can use the Bottom Limit option to select the element as bottom limit. This option is available with the Up-To-Plane bottom type. It has a context menu to create planar element on the fly. The Thread Depth box is unavailable with the selection of Up-To-Plane or Support Depth option.

Note: The element which is selected as the bottom limit must be planar and parallel to the limit face.

Threading Counterbored Holes

The thread depth value you enter to thread counterbored holes does not apply to the counterbored part of the hole. The thread depth for counterbored holes corresponds to the distance shown by the yellow arrow in the image below:



Threading Tapered Holes

You can thread tapered holes in the same way as you thread any other hole types. Once you have selected a tapered hole, the image in the dialog box assists you:



The following figure illustrates how the different parameters you need to value are defined:

User Features and Power Copies

User Features do not support standards used in the definition of thread features.