Oct 17, 2007, 07:47 PM Tri-City park flyer Kennewick, WA. Joined May 2004 124 Posts Discussion Servo torque conversion kg/cm to oz. Anyone know of a calculator online, or way to calculate converting servo torque ratings? Some companies rate them like 1.5 kg/cm. This means nothing to me .
 Oct 17, 2007, 08:01 PM User Colorado Joined Oct 2004 1,471 Posts Multiply the torque (in kg/cm) by 13.88 and the result will be the equivalent in oz/in. So for your example, the torque will be about 21 oz/in. (1.5x13.88).
 Oct 17, 2007, 08:07 PM Inciting Riots Joined Dec 2006 9,690 Posts Try google, I did find one a couple months ago.
 Oct 17, 2007, 09:06 PM Stress Be Gone Snohomish, WA Joined May 2000 3,423 Posts Try Convert 4.1 at xxx.joshmadison.com/software freeware, excellent convertor program for LOTs of stuff.
Oct 17, 2007, 09:11 PM
Stress Be Gone
Snohomish, WA
Joined May 2000
3,423 Posts
Try Convert 4.1

Found at

freeware & very good, see photo

# Images

 Oct 17, 2007, 09:44 PM Pompano Hill Flyers Miami Lakes, Florida, USA Joined Mar 2003 8,492 Posts It helps in figuring out how to do the conversion if you write the units correctly. Units written as kg/cm and oz/in imply that torque is force divided by distance, but it's not. Since torque is actually multiplied by distance (you get more leverage with a longer arm), the correct units are kg-cm and ounce-inches. Since there are about 35.2734 ounces in a kilogram and 2.54 centimeters in an inch, the correct conversion factor is 35.2734 / 2.54 = 13.88 ounce-inches/kg-cm, as rmteo said.
 Oct 17, 2007, 10:14 PM Deletedfor proving Nauga wrong Joined Mar 2005 15,855 Posts you could also just look at the ratings of Hitec servos on their website... They list In-oz and kg-cm.
 Oct 18, 2007, 04:23 AM Registered User Joined Jun 2007 616 Posts Or the US could finally go metric... *ducks* (Not that kgcm for torque is very metric...)
 Oct 18, 2007, 06:21 AM Pompano Hill Flyers Miami Lakes, Florida, USA Joined Mar 2003 8,492 Posts Why is it not very metric?
 Oct 18, 2007, 07:15 AM Registered User Joined Jun 2007 616 Posts It is metric, but it's not the correct unit for torque. kg is mass, not force. Force would be N. I probably should have said that it's not very "SI".
 Oct 18, 2007, 07:22 AM Registered User Indianapolis, IN USA Joined Nov 2000 2,303 Posts Just type "2 kg/cm to oz/in" in the Google search box and you'll get the answer.
Oct 18, 2007, 07:30 AM
Registered User
Joined Jun 2007
616 Posts
Quote:
 Originally Posted by Ralph Weaver Just type "2 kg/cm to oz/in" in the Google search box and you'll get the answer.
Nifty! But then, definitely use the correct units, i.e. kg cm and oz in!
 Oct 18, 2007, 05:52 PM Tri-City park flyer Kennewick, WA. Joined May 2004 124 Posts Thanks for the info. Looking at the Hitec servo numbers would help... if I was looking to get Hitec servos.
 Oct 18, 2007, 06:15 PM Pompano Hill Flyers Miami Lakes, Florida, USA Joined Mar 2003 8,492 Posts Right, Markus. If you use Ralph's method you'll get the answer "2 (kg / cm) = 179.191727 oz / in", which is technically correct but has nothing to do with torque. I'm not sure what sort of quantity is represented by force divided by distance, but Google doesn't seem to care. The correct answer for torque, which Google gives for your expression, is "2 (kg cm) = 27.7747732 oz in" If you substitute Backwing's value of 1.5, you get "1.5 (kg cm) = 20.8310799 oz in"