I have always wondered why tool manufactures still keep using the same brushed motors. The brushless motor revolution is taking the radio control world by storm. Airplanes are flying over 200 mph, and electric cars are approaching 100 mph on race ovals. I know brushless motors cost more, but they would never wear out. Brushless motors combined with the newest batteries out(Li-Poly) would allow your cordless tool to last a long time on a single charge because brushless motors are over 90% effecient. I believe manufactures are somewhat holding back.
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Why are tool manufactures stuck on brushed motors? Page Title Module
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