Post by Chris Green Post by Fredxx Post by Chris Green
What sort of grease is one supposed to use on nylon gearing?
I have just replaced a nylon gear in my garage door opener and would
like to put some suitable grease on it. I'm not complaining about the
durability of the one I had to replace, it was probably getting on for
20 years old!
I've squirted some silicone lubricant on the new nylon pinion but it
feels as if something a bit 'stickier' would be a good idea.
Some say you don't have to lubricate nylon. Some say grease will attract
Yes, I've seen that said too. However the maintenance kits for the
door opener do include grease so, presumably, they think it's a good
However I can't find any actual data showing what types of grease may
affect nylon. The most specific I can find so far is:-
Nylon is generally found in pistons, tappet plates, nozzles, some
contact housings, and lower end gear bushings. The plastic has good
thermal and chemical resistance along with a low coefficient of
friction. Fiber reinforcement can also be added to improve the
strength of the plastic, but may make it unsuitable as a bearing
material (BPF, 2019).
Generally, most all greases will work with Nylon parts in gearboxes.
However, it has been reported that molybdenum disulfide, an
extreme-pressure additive, can penetrate nylon plastic and weaken its
structure (Gianattasio, 2000).