Twin row 30 – Great Plains 3N-4025P Operator Manual User Manual
Page 116
3N-4010P, 3N-4015P, 3N-4020P and
3N-4025P
196-286M
4/23/2010
114
Twin Row 30”
For Round Corn optimum meter speed is 45 to 75 RPM
For Flat Corn optimum meter speed is 65 to 75 RPM ( Shaded Area)
Ground Speed
Calibration Number
1990
High Range
Sprockets Combination
Seed
Population
(seeds/acre)
Seed
Spacing
(inches)
7 mph
6.5 mph
6 mph
5.5 mph
5 mph
4.5 mph
4 mph
3.5 mph
Motor
Driver
Mainshaft
Driven
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
21T
17T
19,960
21.0
20,699
20.2
21,495
19.5
22,308
18.7
22,355
18.7
23,134
18.1
23,286
18.0
24,024
17.4
24,299
17.2
24,985
16.7
26,026
16.1
27,004
15.5
27,157
15.4
28,004
14.9
28,178
14.8
29,082
14.4
29,222
14.3
29,352
14.2
29,414
14.2
30,245
13.8
45
Not Recommended
30,346
13.8
45
30,440
13.7
45
30,527
13.7
45
31,505
13.3
46
31,560
13.3
46
31,610
13.2
47
31,657
13.2
47
31,701
13.2
47
32,875
12.7
48
45
34,092
12.3
50
47
34,139
12.2
50
47
34,190
12.2
50
47
34,245
12.2
50
47
34,304
12.2
51
47
35,404
11.8
52
48
45
35,505
11.8
52
49
45
35,614
11.7
52
49
45
35,733
11.7
53
49
45
36,742
11.4
54
50
46
36,820
11.4
54
50
46
36,984
11.3
54
51
47
37,163
11.3
55
51
47
38,354
10.9
56
52
48
38,592
10.8
57
53
49
45
39,796
105
59
54
50
46
40,021
10.4
59
55
51
46
41,526
10.1
61
57
52
48
43,256
9.7
64
59
55
50
46
44,478
9.4
66
61
56
51
47
44,986
9.3
66
62
57
52
47
46,411
9.0
68
63
59
54
49
46,717
9.0
69
64
59
54
49
48,345
8.6
71
66
61
56
51
46
48,447
8.6
71
66
61
56
51
46
50,279
8.3
74
69
63
58
53
48
52,213
8.0
71
66
60
55
49
54,147
7.7
74
68
63
57
51
46
Twin Row 30”
12 FINGER METER