Re: Helix Angle

Wait a minute, I think I goofed. The angle would be half what I
figured due to the fact that the thread would only angle half the
pitch on one side of the diameter.
So instead of 10.003 it would be 5.0015 degrees. I think....Geez,
next time maybe I'll let someone else speak up first!
Ralph Wenzl


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Terry Owens" <terry@o...>
wrote:

> Hi,
>
> This may at first sight appaer to be off-topic but it isn't. I nned

to know

> the answer so I can draw it in CAD to make a part for a CNC machine.
>
> If I had a piece of round bar 18mm (0.7087") and cut an 8TPI thread

in it

> how would I work out the helix angle of the thread?
>
> Regards,
>
> Terry