Standard data tables for hole features

The following standard data tables are provided to set the default parameters for Drill Size Hole, Screw Clearance Hole, Threaded Hole, and Hole Series features:

• NX_Drill_Size_Hole_Standard.xml
• NX_Screw_Clearance_Hole_Standard.xml
• NX_Thread_Standard.xml

External standard data table files (that is, lookup tables) provide the best fit default values for hole features. You can choose to bypass the tables and enter all parameters manually.

These tables provide default values for the threads, start chamfer, end chamfer, neck chamfer, and relief chamfer parameters, based on the best fit standard for the selected type of Hole feature.

You can customize these data tables as required. See "Customize standard data tables for hole features."

Sample table structure

A sample standard data table (nx6_Drill_Size_Hole_Standard.xml) has columns:

Unit | Standard | Size | Fit | HoleDiameter | StartChamferOffset | StartChamferAngle | EndChamferOffset | EndChamferAngle

Example rows (Metric / ISO standard, Exact fit):

Unit	Standard	Size	Fit	HoleDiameter	StartChamferOffset	StartChamferAngle	EndChamferOffset	EndChamferAngle
Metric	ISO	0.35	Exact	0.35	0.03	45	0.03	45
Metric	ISO	0.38	Exact	0.38	0.03	45	0.03	45
Metric	ISO	0.4	Exact	0.4	0.03	45	0.03	45
Metric	ISO	0.42	Exact	0.42	0.03	45	0.03	45
Metric	ISO	0.45	Exact	0.45	0.03	45	0.03	45
Metric	ISO	0.48	Exact	0.48	0.03	45	0.03	45

(The full table continues through the complete range of standard drill sizes.)

Note on threaded hole standards

There is no single industry standard used to define the data tables for threaded hole features, as there is with the older symbolic Thread lookup tables. The standard data tables for the newer threaded hole come from multiple standards, catalogs, and best practices, some of which do not specify all parameters of each feature or the full range of sizes, but are inferred from other sources.

Learn more

• Hole
• Hole Series
• Editing a Hole Series feature

Look up more details

• Hole dialog box
• Counterbored, countersunk, and tapered hole types
• Screw clearance hole types
• Threaded hole types
• Tapered Hole

Standard data tables for hole features, NX 2212 Series © 2023 Siemens