Hi all, my first post here,(adsbygoogle = window.adsbygoogle || []).push({});

I've succumbed to some help if possible, i know its wrong but it's getting my goat! now, and many times in years gone by.

I am building something as always, and reverse engineering exisiting drive components to select suitable new ones if that makes sense. In particular I am looking at a screw helix mathemtically (trying). or should i say just a screw.

what i want know is the relationship between :

the torque applied at a radius of a screw,

and the linear resultant force.

taking into consideration of course the helix angle, or i think, the helix angle. as that has a relationship with the force output, through an angle.

for instance, a screw thread with diameter 8 and a lead (pitch) of 2.5 between threads. using the trig formula

inv tan = opp / ADJ

and modifying slightly to add 'pi' , as the helix angle is using one full circumfrence of the screw against one pitch. and we are not working in 2d anymore.

inv tan = ( opp / pi.ADJ )

gives a helix angle of 5.68 degrees, great, the helix angle.

now,

what i would like to know is how does that helix angle now affect the output force as a multiplier, forgiving friction, with regard to what is input (torque/any) through the handle

.

i can see it is a ratio, and it changes uniformly, it is a decimal number, a mutliplier, how is the geometrical ratio now expressed?, how much force is output through a helix angle, any!.

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# Torque transmitted through a helix angle?

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