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i try not to use wd40, unless to free off seized metal parts.Ptfe based spray i find ok for moving plastics.Grease from the tub is good for other applications but a word of warning using the pound shop aerosol style grease.I believe it is petroleum based, i had an electric black and decker strimmer in for repair, the one with the moving plastic swivel head. stripped - found the bad cable, thought i would clean up the motor and commutator etc whilst in there. All went well, then i thought after reassembly the head plastics felt a bit rough when twisting and locking into required position, a liberal spray of this grease into the moving plastics well sorted it.....However, as i suspect it is petroleum based (smells like it to me ) it produced a highly flammable vapour in the head assembly which isnt good with the slightest spark from the motor brushes....This one exploded as i tested the unit, quite a bang for a small amount of spray grease. Very funny looking back
WD40 is fine with plastic, I've used it for years including on Dyson's flimsy plastic with no issues. I use it on everything to clean as well as oil and prevent corrosion.
WD40 isn't much good on motor or brushroll bearings as it dries out when it gets hot and glues it up again. A silicone based lubricant is much better.
Quote from: MVacs on May 08, 2017, 01:16:43 pmWD40 isn't much good on motor or brushroll bearings as it dries out when it gets hot and glues it up again. A silicone based lubricant is much better.I use it on the motor seal when fitting a new motor to a Dyson. Although, Vaseline isn't bad too either.