MacDon D50 - Page 64

169441 52 Revision D
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Figure 3.33: 6.1 and 7.6 m (20 and 25 ft.) Single- and Double-Knife Headers
Group A - Forage, alfalfa, and flax Group B - Canola, cereals, and edible beans
Example: Cutting Group A crops at 8.0 km/hr (5.0 mph) with a single-knife header, use a knife speed between 710 and
735 rpm (1420 and 1470 spm).
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Figure 3.34: 9.1 m (30 ft.) Single- and Double-Knife Headers
Group A - Forage, alfalfa, and flax Group B - Canola, cereals, and edible beans
Example: Cutting Group A or B crops at 8.0 km/hr (5.0 mph) with a double-knife header, use a knife speed of approximately
680 rpm (1360 spm).
OPERATION