As for a lubricant it's a fantastic anti rust preventative, but I use regular gun oil for moving parts and for extreme cold arctic weather I used both WD40 and automatic transmission fluid as lubricants using no oil. NO JOKE! Strike-Hold that does a very good job of CLEANING and a light Lubrication.
Similarly, is WD 40 a silicone lubricant?
Safely lubricate, waterproof and protect metal and non-metal surfaces with WD-40® Specialist® Water Resistant Silicone Lubricant. Its spray dries fast and leaves a clear, non-staining film that doesn't stick or make a mess, so it won't attract dust or dirt.
Is it OK to use wd40 on a door lock?
Says the opposite "Any, “all purpose” oil or lubrication will do the job, but be sure never to lubricate your door locks with powder graphite, as it will do more harm than good. Simply insert the straw (which is normally supplied with lubricants such as WD40) into the lock cylinder and spray away! "
Is wd40 a good lubricant for bearings?
Again, it is unlikely that WD40 would meet these requirements as a lubricant. Third, depending on the operating environment, the bearing will be prone to corrosion, particularly rusting. Keep in mind that WD40 is manufactured and marketed as a household lubricant for those "small jobs" or as a rust remover.