Latest Responses

By Mahkie

November 1, 2015, 2:29 pm

Tool Torque?

Would you mind taking a moment to explain how tool torque is calculated? What does the "safety factor of 2" mean? :blink:


cant leave messages here
Pages:(1) [1]

Eldar Gerfanov

November 1, 2015, 3:46 pm


Maximum torque a tool can take is calculated using a math formula based on its material and size.

Beacuase nobody knows the real number for their tools, I use a percentage representation.

And endmill will he able to handle 100% for sure because 200% represents the actual mathematical breaking pont of the endmill.

Thus the safety factor of 2 - when you set the limit at 100% it is still under half the maximum load it can take.

Why I use 200% as maximum? Because otherwise people would think it is OK to try to push their tools the the actual breaking point. This way 100% is considered safe and 200% is considered dangerous(very!)
Much like spindle load meter on your CNC goes to 150 or 200% but you still know that you probably should not be at 200 all the time:)

I personally set deflection limit at 100% and torque at 150% at my work.



November 5, 2015, 11:36 am

Alright, that's really good to know! I've been keeping at 70% but knowing that now I don't see much reason to take it below 100% for general use.

Thanks again!

© 2009-2022 Eldar Gerfanov. All Rights Reserved.
© 2009 Eldar Gerfanov. Materials on this site are presented as is and are mostly for educational use.

You may freely reproduce information presented herein without any consent from me, provided you include link to this site.
In case when i am not the copyright holder, you may want to contact proper owner of material. Anyway, they are freely available on the Internet.
If you hold the copyright right for any of the materials on this site and want them removed, please contact me here