Inventor Tools tab > Thread Modeler button, then click a thread to populate the dialog box
C:\Users\jensejj\AppData\Roaming\Autodesk\Application\Plugins\Autodesk_ThreadModeler.bundleContents\Thread Templates\SW Template.ipt or ISO Template.ipt
Thread Sketch Template:
This plugin was written by Philipe Leefsma, Developer Consultant at Autodesk, working as part of the Autodesk Developer Network program.
Support information - email labs.plugins@autodesk.com with feedback or requests for enhancements
The ThreadModeler tool has been developed to allow Inventor users to generate a realistic modeled equivalent thread based on an existing Inventor thread feature. Users are able to select an existing thread feature in the model, which the ThreadModeler then converts to a realistic 3D modeled thread based on the underlying thread feature properties. Modeled threads are accurately generated saving a lot of time and effort for the user when compared with a manual approach, bringing a higher degree of realism to your models. This plug-in was first published as an ADN Plugin of the Month: http://labs.autodesk.com/utilities/ADN_plugins. The plug-in has been provided with the complete source code needed to build the application, with the intention of encouraging users of Autodesk software to use programming to tailor the products they use to their specific business needs.
Nut Standard - Nuts for General Applications: Machine Screw Nuts, Hex, Square, Hex Flange, and Coupling Nuts (Inch Series). American National Standard ANSI/ASME B18.2.2-2010 (PDF preview and secure PDF))
UNR = only applies to external threads, has a rounded root contour
“UNR applies only to external threads; the difference between UN and UNR threads, in addition to designation, is that a flat or optional rounded root contour is specified for UN threads, while only a rounded root contour is specified for UNR threads.” (ASME B1.1-2003 Unified Inch Screw Threads, p. 1)
UNC = Unified Coarse
UNF = Unified Fine
UNS = Unified Special, use only if Standard Series do not meet requirements
UN = Unified (constant-pitch serices with 4,6,8,12,16,20,28 and 32 threads per inch)
UNEF = Unified Extra-Fine
Class 1A, 2A and 3A = apply to External threads only
Class 1B, 2B and 3B = apply to Internal threads only
Class 2A and 2B are the most commonly used for general applications, including production of bolts, screws, nuts and similar fasteners.
Creating a 1/2” Nut (head diameter 3/4“) - Hansen Method
Create a 2D Sketch within Inventor, select the XY origin work plane
Create a 6 sided polygon (hexagon), centered at the origin
assign a dimension of 3/4” across the flats (size of wrench used to install the nut)
draw a 1/2“ circle (size of nut, that is where the nut threads will be applied), assign a 1/2” dimension and then finish the sketch.
extrude the nut 0.375 inches in the negative z-direction
apply a thread (cannot be done in sketch mode). Use an interior thread (class 2B) with size 1/2“ and 32 threads per inch
Creating a 3/4” Hex Nut - ASME/ANSI Method
follow steps in Hansen Method then do the following
On the YZ plane, create the following triangle (interior angle of 30°, adjacent distance of (Gmin - Fmin)/2, and distance from centerline axis of Gmax/2
<b>F</b> is the width across the flats, also known as the size of wrench to use.
<b>G</b> is the width across the corners
Nut size (interior hole diameter) is the size bolt that the nut is used with, not the size of wrench used to adjust nut. Same applies to washers and bolts, purchase based on the diameter of the bolt, not the head size (see Boltdepot.com - Measuring Fastener Diameter).
“Starting threads on NOT GO (LO) thread ring gages are subject to greater wear than the remaining threads. Such wear in combination with the incomplete threads at the end of the product thread permit further entry in the gage. NOT GO (LO) functional diameter is acceptable when the NOT GO (LO) thread ring gage applied to the product external thread does not pass over the thread more than three complete turns. The gage should not be forced. Special requirements such as exceptionally thin or ductile material, small number of threads, etc., may necessitate modification of this practice.” (ASME B1.2-1983 Gages and Gaging for Unified Inch Screw Threads, p. 128)
Thread Cutting Videos
Toms Techniques
Thread Cutting on the Lathe, Part One - Threading Tool Geometry
Thread Cutting on the Lathe, Part Two - Calculating the Flat Width and Helix Angle
Thread Cutting on the Lathe, Part Three - Grinding the Tool
Thread Cutting on the Lathe, Part Four - Setting up the Lathe and Cutting the Thread
