Hello, this is a SolidWorks question.

Hello, this is a SolidWorks question. I am wondering how to make a “threaded” hole in SolidWorks. The specifications are: – 0.635 – 8 ACME (I have found under ANSI and tap drill a 3/8-16), but cannot find a 3/8-8. And I don’t understand what ACME is and how to select it in the Hole Wizard. – 0.25-20 UNC – 2B is the other hole I need to create. Thank you.

The Correct Answer and Explanation is:

To create threaded holes in SolidWorks using the Hole Wizard, follow these steps:

For the 0.635-8 ACME Thread:

1. Understanding ACME Threads:
   ACME threads are a type of thread profile with a trapezoidal shape, commonly used in lead screws or for applications where power transmission is required. The “8” refers to the thread pitch (distance between threads), which in your case is 8 threads per inch.
2. Creating the Threaded Hole in SolidWorks:
   • Open the part in which you want to add the threaded hole.
   • Go to the Hole Wizard (found in the Features tab).
   • Under the Type selection, choose Threaded Hole.
   • In the Standard dropdown, select ACME from the list. If the 3/8-8 ACME option is not available, select a close option like 3/8-16, or you can create a custom ACME thread. However, if the specific 3/8-8 is missing, you can manually input the specifications in the custom thread section.
   • In the Size dropdown, choose 3/8 for the hole size, and manually enter the 8 threads per inch if needed.
   • For the End Condition, you can choose through hole or blind, depending on your requirement.
   • Adjust the Depth and other settings accordingly and hit OK.

For the 0.25-20 UNC – 2B Thread:

1. Understanding UNC and 2B:
   UNC (Unified National Thread) refers to a standard series of threads, and the “2B” indicates the internal threading (female thread) with a medium fit. The 0.25-20 means the diameter is 0.25 inches (1/4 inch), and the pitch is 20 threads per inch.
2. Creating the UNC Threaded Hole:
   • Again, open the part where the hole needs to be created.
   • Open the Hole Wizard.
   • Choose Threaded Hole.
   • From the Standard dropdown, select ANSI Inch.
   • In the Type dropdown, select Tap.
   • For Size, choose 0.25-20 UNC. SolidWorks will automatically set the dimensions and fit for the thread type.
   • Select the Hole Type as Through Hole or Blind Hole, depending on your need.
   • Set the End Condition and any other parameters specific to your design.

Summary:

• For ACME threads, you may need to adjust the hole size and thread pitch manually if the specific size is not listed.
• For UNC threads, the Hole Wizard should automatically recognize the standard sizes, including 0.25-20 UNC.
• Use ANSI Inch for standard Unified threads and ACME for trapezoidal threads. Ensure to specify the fit and depth of the hole based on your design requirements.