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Author Topic: Useful website with lots of calculators  (Read 609 times)
Bubba
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« on: April 14, 2018, 22:54:45 pm »

 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/

« Last Edit: April 14, 2018, 23:23:35 pm by Bubba » Logged

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lloydsp
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« Reply #1 on: April 15, 2018, 00:14:36 am »

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

Lloyd
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dave benson
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« Reply #2 on: April 15, 2018, 00:19:01 am »

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


* drill size error.PNG (31.68 KB, 453x392 - viewed 27 times.)
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Bubba
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« Reply #3 on: April 15, 2018, 01:21:37 am »

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.   Wink
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dh42
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« Reply #4 on: April 15, 2018, 02:16:45 am »

Hello

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

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

++
David
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dave benson
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« Reply #5 on: April 16, 2018, 04:17:33 am »

Very slick software thanks!

Dave
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Bubba
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« Reply #6 on: April 16, 2018, 13:05:29 pm »

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..   
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dh42
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« Reply #7 on: April 16, 2018, 15:49:40 pm »

Hello

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

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David
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dave benson
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« Reply #8 on: April 16, 2018, 22:14:34 pm »

Hi Bubba
Is this want you were after.
Dave


* reply for bubba.PNG (144.6 KB, 812x576 - viewed 37 times.)
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Bubba
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« Reply #9 on: April 17, 2018, 18:15:52 pm »

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