On 27 Apr 2006 16:51:33 -0700, wrote:


Can someone who has experience with coldsaws please explain how these
differ in performance and blade lifespan (cost effectiveness) compared
to true coldsaws?

Thanks,

Dave

Night and day.
The first thing to look at with any machine tool is the weight- this
tells you a lot, and is particularly informative in this case.
First, consider a standard $150 abrasive chop saw- 40 pounds or so.
With a 15 amp motor, which "develops" 3 hp? so they say, actually
probably more like 1/2hp.

Then, one of these new hybrid saws, with the carbide blade- the dewalt
is 47lbs, with again a 15 amp motor rated at "4 hp".

Sorry, Homey just doesnt believe the horsepower ratings.

Now look at a real coldsaw, like this Doringer- 780 lbs, and an honest
3hp 3phase motor.
http://www.doringer.com/d350.htm


snip good comments

I'm curious. In the land of Nader, why are there no laws that prohibit a
company from claiming that a motor can produce twice the power that its
electrical supply will allow it to consume?

Over here in Blighty The company could be prosecuted for falsely describing
the product.

The adverts for the toy cold cut saws state no-load speeds of 1300 and 1500
rpm. Are the saws geared or are they really running at 5000 fpm? I'm not sure
that I would want to cut anything more than aluminium at that speed with only
a carbide tipped blade.


Mark Rand
RTFM