Three Ways toDraw a Threaded Bolt
Even though they look different, they allmean the exact same thing. It is theCALL-OUT information that is critical.
Simplified
Schematic
Detailed
Let’s draw a simplified bolt first…
Draw two parallel lines that are the distanceof the major diameter and then draw twomore lines that are the length of the bolt.
Draw the inside diameter lines
And then put in the center line
Change the inside diameter lines to hiddenlines
Tip of the bolt
Draw a line on the end of the bolt equal to thewidth of one thread (this is the pitch)
Draw diagonals from the edge of the majordiameter to the tip
Trim up the lines, clean up the drawing, andyou done!
Be sure and label cleanly with the call-out
Schematic
Starts off like the simple.
Draw two lines for the major diameter and thelength of the bolt.
Draw in the two minor diameter lines.
Threads
Now, draw in where the threads will be fromthe outside diameters.
This example is a 3/8 – 16 UNC – 2A bolt
The pitch is 1/16
We will draw a line every 1/16 of an inch forthe threads in the major diameter.
Threads Continued
Now, draw in a line between the two lines ofthe minor diameter.
These lines will be ½ between the 1/16 linesso these would be 1/32 from each line.
There are several different ways to do this.Some commands are array, offset, copy andpaste, and just plan draw them in everyinstance.
Final Step
Go in and delete the minor diameterconstruction lines, complete the tip like in thesimplified version and you are done.
One to the challenge….
Detailed
Do everything through a complete schematicdrawing.
Then, draw a line from the top of one of thelines on the major diameter to the top of oneof the lines of the minor diameter.
Then, go back up, forming a V.
Continue across the top until finished at theend of the bolt.
Here’s the tricky part…
Do the exact opposite on the bottom. If youare copying it, you want to be sure the insideof the tooth on the bottom lines up with theoutside of the tooth on the top.
The example shown has a few done that arethen copied and pasted.
Then, the copies are moved into position onthe bottom.
Cleaning up
The lines in the middle between the majorand minor diameter are now deleted orerased.
Last Steps for threaded part
Draw a line that connects the outer points onthe top with the outer points on the bottomand do the same for the inner points.
This makes the lines slant and appear to bethreaded.
Continue until length of the bolt is covered.
After all this, the head part is easy
Draw a circle that matches the major diameter.
Place the polygon that matches the bolt typeinside the circle.
Draw lines over the polygon and circle to the bolthead.
Offset the rectangle where the head is on thebolt.
Draw an arc in that middle. Copy and paste onthe two sides. Trim and clean it up.
