[FrankC]

This is an interesting video:

 

[FrankC]

It is basically just a way of classifying them into categories that appeals to the masses. As long as every company uses the same fuzzy math it doesn't really matter, I know I'm not getting a 6.5 HP motor powering the machine but I can figure out that a 6.5 HP listed model will out perform a 2.5 HP listed model, and that the other 6.5 HP listed models will be roughly as efficient.

 

[FrankC]

I think someone actually should sue one of them. Actually taking the matter to court would force the manufacturer to reveal exactly what kind of screwy math they're using to reach those ridiculously high HP numbers, or to admit it's BS.

I would bet the farm that what they are claiming will stand up in court as it will have been worded by some very clever lawyers.

 

[FrankC]

Only if you assume that all the motors have the same efficiency. And you know what assuming can lead to....

Guess you missed the word roughly.

 

[FrankC]

Sometimes that's an invitation to error Frank. The Chinese B&D sander I used to have was not 'roughly' the same efficiency as the Swiss made Bosch sander I own today. If I used your logic the B&D would look like the better sander because it draws more power but nothing could be further from the truth. If I compared the Swiss unit to Chinese units that draw the same power the Chinese ones would be far inferior.

Sorry I am completely out of nits, you will have to pick them somewhere else.