drawing thread on end of spindle

QCAD Professional QCAD 'How Do I' Questions
1

USING:
Win 7/32
4g RAM

Version: 3.9.1.0 (3.9.1)
Build Date: Mar 13 2015
Qt Version: 4.7.4
Compiler: MSVC++ 10.0 (2010)

Basically I want to thread end of shaft in Qcad.

Searched under “thread QCAD” and I find plenty of forum “topical threads” about any given topical thread, but nothing about M20 or UNF etc etc threads.

It must be tagged to a menu item which I can’t see, but not for want of looking.

Thanks.

Regards,
Kevin

2

Perhaps you can find an existing image online to explain what exactly you are trying to draw. There are various ways and standards to depict threads. Google image search might help.

3

th.jpg
th.jpg160×114 1.3 KB

Hi Andrew,

I have a shaft and I want to thread the smallest journal on the end of this shaft.

More correctly I want to draw the shaft with a thread on the end of it, much like the bolt shown.

Thanks.

Regards,
Kevin

4

Such threads are typically represented as shown below in CAD. But as previously mentioned, there are different standards.

5

new2QCAD.png
new2QCAD.png517×145 1.38 KB

Hi Andrew,

I want to draw a UNF 60 degree thread form on the end of the spindle.

Regards,
Kevin

6

Have a look at the image I’ve posted above. That’s how you typically represent a thread in CAD. In the dimension label, you then type the specifics about the thread (e.g. M10 for a metric thread with a diameter of 10 or UNF. You also see drawings with a leader pointing to the thread with a label “UNF”:

Are you thinking about drawing the actual thread lines? If so, don’t. The images I’ve posted show how to draw a thread in CAD.