When should I not use WD-40?
Looks like WD-40 can be used for lubricating just about any metal parts.
Are there non-obvious cases where using WD-40 will be harmful to the stuff lubricated?
Question from user sharptooth at stackexchange
Answer:
Firearms - you should never use WD-40 to clean or maintain firearms. .
Drive chains of any type - because WD-40 isn't a lubricant it really will not work well on Drive chains of any type.
Gears of any type - WD-40 doesn't have enough lubrication effect to be useful on any type of gearing. Only specified gear lubricants should be used.
Locks - Use powdered graphite or silicon spray instead.
Answer from user nevadaexile at stackexchange
Looks like WD-40 can be used for lubricating just about any metal parts.
Are there non-obvious cases where using WD-40 will be harmful to the stuff lubricated?
Question from user sharptooth at stackexchange
Answer:
Firearms - you should never use WD-40 to clean or maintain firearms. .
Drive chains of any type - because WD-40 isn't a lubricant it really will not work well on Drive chains of any type.
Gears of any type - WD-40 doesn't have enough lubrication effect to be useful on any type of gearing. Only specified gear lubricants should be used.
Locks - Use powdered graphite or silicon spray instead.
Answer from user nevadaexile at stackexchange