Please, can you help me? Roullete hardware questions.

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First of all, please sorry for my terrible english. Isn´t my native language, so please be patient with me. Please, can you help me with few questions?

I have roulette wheel, full size, from London casino supplies.

1) I do not know whether it is necessary to lubricate bearings. If yes, what oil to use? Is necessary dismantle bearings?
2) When i do not use roulette, is better to leave rotating wheel inside the roulette, or is better take out the rotating wheel, because is really heavy. In order to prevent wheel bias.
3) Do you have any informations about roullete wheels from London casino supplies?
4) Do you know something about lifespan of roulette wheel. In spins and in time?

Many, many thanks for your answer, have a great day.