What is the lubrication type encountered in worm wheel drives? a) What is the chief consideration as...

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Mechanical Engineering

What is the lubrication type encountered in worm wheeldrives?
a) What is the chief consideration as far as the lubricationrequirements for worm wheel drives go?
b) What type of lubricant is recommended for worm wheeldrives?

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Operation of worm gears requires unique lubrication demands. The operation of worm gears is sideway sliding motion, hydrodynamic wedge is impossible to maintain, so worm gear will operate under boundary lubrication conditions.

a) The chief considerations are that lubricants must have high-temperature tolerance like oils with an ISO VG of 460 (AGMA Class 7) and higher as the working temperature may reach as high as 88-degree Celsius or higher. the lubricant must have good thermal and oxidative stability and viscosity.

b) types of gear oils:

1. compounded gear oils

2. extreme pressure gear oils

3. synthetic worm gear oils.

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