Double-disk openers with aluminum boots work well in well-prepared seedbeds and dry soil. Blades bolt on to allow use of a broad range of depth-gauging attachments. Double-disk openers with cast-iron boots are also available. They are heavier and have greater clearance inside of double disk openers for better performance in wet, sticky soils.
Spring down pressure*
Total penetration force
10.4 kg (23 lb)
11.3 kg (25 lb)
43 kg (95 lb)
21.8 kg (48 lb)
53.5 kg (118 lb)
12.7 kg (28 lb)
11.3 kg (25 lb)
24 kg (53 lb)
56.2 kg (124 lb)
*NOTE: The down pressure figures are based on 25.4 mm (1 in.) of push rod showing above spring.
The half-speed drive reduces the feed shaft speed by one-half, which allows obtaining the very low seed rates required for crops such as rape and sorghum. It also permits higher seed index settings for large seeds such as soybeans. This resulting greater flute exposure reduces seed damage sometimes caused by forcing seeds through the opening between the shutoff and feed cup housing.
The seed and fertilizer metering systems are powered by the end wheel. A heavy-duty, high-strength No.40 roller chain provides a positive drive. Spur gears and sprockets are machined to provide a more accurate fit for longer life. Gears can be interchanged for either a slow or fast speed.
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