[Where can I buy drive belts for a belt sander?]

Go to the ASC for your particular brand and you should be able to get it locally as well.

[Table Saw: I sliced into my rip fence]

I figured you would be able to tell when you were cutting the laminate before you got to the fence. Like I said I don't know the first thing about working with wood.

[Table Saw: I sliced into my rip fence]

may I ask a question out of curiosity, I'm not a wood worker I own a power tool repair shop. Would you be able to glue a piece of laminate to protect the fence from this happening?

[240 volt speed reducer]

I'd be very leary of plugging your die grinder into anything that will reduce the voltage. It will more than likely overheat and burn up. I am not familiar with the HZ that the UK uses. But Inthe US. a 220V tool will run on a 110V at half speed untill it overheats and burns up. There used to be quite a lot of variable voltage construction tools out there. They were designed to be used on the older style genereators that fluctuated with load. I don't know if your grinder has this capability but it will tell you on the name plate.

[Dewalt D25940 Demo hammer Problem]

it probalby needs to be serviced the anvil inside is probably not able to keep up when the hammer is at speed to to the grease being old

[Drill chuck comming loose]

keyed chucks can be a pain but if you tighten all three sides rather than just one it will prevent it from loosening