



Do You Lubricate Nylon Gearing?
Hi.
I acquired a Kenmore 385 recently for cheap because my starter machine, a 1967(?) Singer 347, offered only straight, and zig-zag stitching. The Singer is a metal-geared workhorse. The Kenmore is from the eighties, and reflects the industry's move to nylon power trains.
The Singer had old, gunky grease on the metal parts of the drive system. Before using it, I cleaned off the gunk, and applied SuperLube synthetic.
In contrast, the nylon internals of the Kenmore are in pristine shape, but they do not appear to be lubricated. I know nylon is self-lubricating.
I've checked for degradation of the nylon parts, and they seem solid, so the machine has not been neglected. I'm unclear how to proceed in preparing the Kenmore for use.
My research suggests grease should be present. Is it appropriate/necessary to apply nylon-safe grease to power train parts? Why would these parts be completely clean? Is that normal?