On Tue, 8 Jun 2004 09:16:25 +0100, "RichardS" noaccess@invalid
wrote:


"Andy Hall" wrote in message
.. .
On 7 Jun 2004 17:53:55 -0700, (cisco kid)
wrote:

snip

It's relatively easy to measure input power and can also mean that
seemingly impressive specs can be written. The Precision Performance
Power Pro (or whatever they are called this week) routers from B&Q are
the epitome of this, with a 2000W input power (allegedly) but with a
performance equivalent to about half that at best.

There would need to be some standards for this, and probably to be
useful, a measurement method for each type of tool under standard
conditions - i.e. a cutter of a certain size on a router etc.

I don't see that happening any time soon, so in the meantime it's
necessary to be guided by manufacturer, price, and ideally trying out
the tool.



Suppose output torque would be a useful measure. Don't see it happening
ever, though... manufacturers will use whatever gives the highest number for
the consumer to read. Suspect a 50% efficient 2000W tool would always sell
better than an otherwise-identical 75% 1500W tool.

Exactly. The opportunities for the marketeers are there. That's why
I think that for the measure to be meaningful, it would have to be
related to the type of tool, or at the least there needs to be a
standard method of measurement for the tool type. For example, it's
easy to conceive how that could be done for a fairly simple rotating
tool like a drill or router, but how would you do it for a belt
sander?

Also, if torque becomes a measure of goodness, is that appropriate for
the behaviour of all tool types?


Amplifer power and music power springs to mind...

Yes indeedy.


..andy

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