What type of grease should I be using to lubricate internal printer parts,
both laser and inkjet.
Steve
Lubricants vary by model and some models will use several different
lubricants. The following are very general statements and may be
totally false in relation to your particular model.
The lube commonly used on the print head rail is white silicon grease.
Some models use light machine oil. These tend to be older models with
metal gears and bearings.
Some models don't appear to use any grease at all on the print head
rail, as the rail on some models is plastic (Nylon?) or coated with
what might be Teflon. You wouldn't grease these, as petroleum
lubricant products can weaken some plastics.
Some laser printers use graphite as the lubricant. Oiling or
greasing these will cause problems, as oil or grease plus graphite
will create a black sludge that gums up the works.
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You can usually tell what the lubricant is. If you see nothing, and
the parts are plastic, it probably doesn't use any additional
lubrication, as parts made of compressed Teflon and nylon tend to be
very low friction.
If you see a black powder, it might be graphite. Of course, it could
also be just some spilt toner.
White or grayish, translucent goo, that's probably white, silicon
grease.
I haven't seen anyone use light machine oil on computer equipment in a
long while.