Rank: Forum user 
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Is there a British / ISO Standard or guidance relating to the colours of moving parts of machinery?
Thanks
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Rank: Super forum user
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Not aware of one.
But it is common to indicate mechanical components that have to be 'locked' in place or in a certain position before operation/use with either yellow or red paint.
i.e. once locked/assembled properly the colour won't be visible
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Rank: Forum user
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It is standard practice in the lift industry that moving parts are painted yellow.
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Rank: Super forum user
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Perhaps it's just over-imagination on my part, but don't some machines, e.g. jet engines, have moving/high speed components with distinctive patterns on them which are visible only when the components are stationary or almost stationary? If engineers involved with them can't see the patterns/distinctive markings, they know that the components are in motion and should not be approached.
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Rank: Super forum user
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Graham Bullough wrote:Perhaps it's just over-imagination on my part, but don't some machines, e.g. jet engines, have moving/high speed components with distinctive patterns on them which are visible only when the components are stationary or almost stationary? If engineers involved with them can't see the patterns/distinctive markings, they know that the components are in motion and should not be approached.
The only thing that I came across in my previous life as an aircraft engineer was the patern on RAF propellors. Painted in a randon black and white it "flickers" when turning. As for stationary, nothing springs to mind for health and safety, there are however flight safety reasons. The insides of some panels and internal areas on aircraft is/are painted red or yellow to indicate that the panel is open when it should be securly closed prior to take off.
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Rank: Forum user
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most of ours are a sort of oily colour!
seriouosly though, this isn't one i have heard of before and would interested to know
the flight version is interesting and could be useful in other areas
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