Or it’s just cooling. In any case, I saw this on Fast Company — “…Doesn’t Suck, It Blows” –, and couldn’t decide whether to go with the “Cool” title, the “Hot Or Not,” or the “Tool Pr0n” title. Dyson’s new Air Multiplier™ is probably not the fan you want to have out in the garage, but the technology involved is kinda neat. It is, as you may have noticed from the picture, blade-less, and based on phenomena the Dyson engineers noticed when developing their Airblade hand dryer — which is also interesting in that it uses a single thin sheet of air, moving at up to 400 mph, to blast the water off your hands. In the Air Multiplier™, this sheet of air, generated by a “mixer flow impeller” in the base, creates negative pressure as it exits the rim, and draws in more air from behind the fan. The result is a claimed 15× amplification in air, and none of that annoying “unpleasant buffeting” from fan blades.
The 10″ fan is $300, and the 12″ is $330. So while it won’t hurt if you stick your hand in it, it will cost you an arm and a leg.
Dyson [Manufacturer’s Site]
Keeping work cool is a sure-fire way to improve accuracy during machining, but every method has drawbacks. Liquid cooling is very effective and lubricates well, but it’s messy and the hardware’s expensive. Air cooling, while cheap, doesn’t do the job as well. A company called ITW Vortec markets a device which is advertised as combining the advantages of both, courtesy of a subzero air stream. Their Cold Air Guns take 100psi compressed air, spin it around a tube’s inner diameter at a million RPM, and the resulting air currents send hot air out one end and cold air out the other. Sounds like science fiction, but there seems to be good science backing up their claims.
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