Tangental and Thrust force on worm gear
Tangental and Thrust force on worm gear
(OP)
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 worm at 1500RPM
with a 50 tooth 4.167"gear with a 25:1 ratio nets me almost 42000N
of Thrust force, that can't be right, what am I doing wrong here?
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 worm at 1500RPM
with a 50 tooth 4.167"gear with a 25:1 ratio nets me almost 42000N
of Thrust force, that can't be right, what am I doing wrong here?





RE: Tangental and Thrust force on worm gear
RE: Tangental and Thrust force on worm gear
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.
RE: Tangental and Thrust force on worm gear
RE: Tangental and Thrust force on worm gear
The Formula I was using at first comes from This PDF (Page 6 for worm gears). The equasion looks simple enough but I mess up somewhere and get really high numbers.
RE: Tangental and Thrust force on worm gear
RE: Tangental and Thrust force on worm gear
Try this site:-
http://www.roymechx.co.uk/Useful_Tables/Drive/Worm...
RE: Tangental and Thrust force on worm gear
I can probably use that site as a reference too, although the banner on top says the formulae are unverified.
RE: Tangental and Thrust force on worm gear
RE: Tangental and Thrust force on worm gear
RE: Tangental and Thrust force on worm gear
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.