He says it is for a vehicle simulator, if it's for some kind of steering drive then the backlash will be felt, if it's for some kind of actuation with weight resting on it then the contact side shouldn't change.
Ah okay, that looks closer to a previous formula I saw, I can adjust for my actual pitch and friction and get numbers that make sense.
Thanks, it was a frustrating problem since everyone I asked looked at me with a blank face or pointed to a formula they didn't know how to apply.
This site gives the 2 x M 1 / d 1 formula like Occupant first mentioned, I will stick with that one and the result of 286N for bearing life calculations.
I can probably use that site as a reference too, although the banner on top says the formulae are unverified.
Thanks, I had worked with that website before and it uses a completely different formula than the other places by using a whole lot of angles and rads to come up with something around 700N.
The Formula I was using at first comes from This PDF (Page 6 for worm gears). The equasion looks simple...
So axial load on a worm is 2 x Torque / Worm Pd so
2 x 3.635Nm = 286N
0.0254m
That's way easier than what I was doing,
do you have a reference for that formula?
Most of the material I found on worm gears is willingly obtuse.
I need to get the thrust load on a worm shaft for bearing life calculations.
The Thrust force should be:
0.98 x Tangential force
And the Tangential force should be:
(1.91 x 107) x Power x efficiency
Pitch Diameter of gear x Speed of gear
So my 0.55Kw electric motor turning the 1", 2 start...
