A chaffcutter motor runs1440 rpm, reduced4:1 to a two-knife cutter shaft. Feed rollers of10 cm diameter run through a further15:1 reduction. Find theoretical cut length in mm (two decimals).
Cutter speed is360 rpm and feed rollers24 rpm. Feed distance per minute=π(100)(24) mm. There are2×360=720 cuts/min. Length per cut=π(100)(24)/720=10.472 mm, or10.47.
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