Useful website with lots of calculators

[Bubba]

 I stumbled on this website when looking for info pertaining to thread I need to cut. Just browsing I took the thread calculator for spin.. It works well.  There's also phone app available, but from what I read is not so good. I'm using it by simply going to the website..


 http://theoreticalmachinist.com/

[lloydsp]

AH!  I've USED them before!  Yes, they have good calculators there.

Lloyd

[dave benson]

Hi Bubba

I went and had a look at the site, and tested out the tap and drill size chart.
The chart has an error in it for 3mm x .5 metric threads tap size = 3.0 mm  (I use 2.5)
This stood out as I use 3 mm threads a lot, so you might want to double check against another chart, just for peace of mind.

Dave

[Bubba]

Hi Dave,
Thanks for point that out so others who use those charts be aware of potential problems. Myself, I don't use metric units and mainly interested in the thread calculator.   

[dh42]

Hello

I use this soft (free) for thread (lathe)

http://www.vargus.fr/vardex/template/default.aspx?pCatId=9&pageId=74

++
David

[dave benson]

Very slick software thanks!

Dave

[Bubba]

Yes, nice slick software David. Thanks for sharing.

The problem I run into was the thread pitch selection box. Possibly, because I haven't installed the 100Mb version and the options were limited, I didn't see the decimal points numbers to use for 1-14 thread (0.0714). Yes, the software was set to inch units..   

[dh42]

Hello

If I well remember, the 100MB version is the same for the software, the extra MB are PDF thread datasheet.

++
David

[dave benson]

Hi Bubba
Is this want you were after.
Dave

[Bubba]

Yep, that's exactly what I want to see. Thanks for point this out Dave.