09-02-2015, 07:10 AM
A 175 rpm machine, or even a dual speed that tops out at 300 rpm is limited to a large rotation that by comparison is fairly slow. The VARIO makes 1725 small little dime size oscillations per minute. Those small oscillations are far more effective at connecting with the carpet pile than the large sweeping revolutions of a rotary machine. There's a big difference in the way an OP performs, compared to a rotary.