Grease for polymer/metal gear system

[JHZR2]

Hello,

rebuilding a 27yo hirschmann power antenna from a mb, because the shaft was bent and the new one wasn't taking.

Gears are some polymer (nylon perhaps, but no guarantee) mating to a metal worm gear off a motor.

There is a decent light tan grease on various parts, but it is blackish where the gear and metal meet. No notable wear on anything, issue with operation was bent shaft caused the shearing of the shaft leader, putting lots of debris inside.

Grease was fluid and decent after 27 yes. Would like ideas of the best grease.

Old stuff reminded me of lo-temp Mystik grease sold at tsc, but I doubt petroleum was used in there.

Any recommendations?

Thanks!

 

[Kestas]

For those kind of applications I use Molykote 33 from Dow Corning. This is a litium-based silicone grease made for automotive metal/plastic lube applications, such as wiper motors, and is probably better than what was originally used for the antenna.

http://www1.dowcorning.com/DataFiles/090007c88009534a.pdf

 

[JHZR2]

thanks, ordered some from mcmaster.

 

[tdi-rick]

A little late, but if anyone else is interested this looks like an interesting grease for similar applications.
I'm considering it for bike bottom bracket bearings which usually aren't sealed that well and I want a low drag grease.

http://www.anglomoil.com/tds/RoboticGrease.pdf

An NLGI 00, Calcium Sulfonate thickened (better corrosion/water resistance than a lithium or aluminium thickened grease) semi-synthetic oil (have no idea what type) with PTFE.

 

[Michael_P]

I like Superlube. It's clear in color, slightly thinner than other greases, easy on plastics and has EP additives.

http://www.super-lube.com/