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EXAMPLE
EXAMPLE
| LOW RANGE INPUT SPROCKET |
| Approximate Seed Population |
| Sprocket Combinations (Number of Teeth) |
762 mm
(30 in.) |
965 mm
(36 in.) |
| Driver |
Driven |
Rows |
Rows |
| 35 |
24 |
35,733 |
29,777 |
| 35 |
25 |
34,304 |
28,586 |
| 35 |
26 |
32,984 |
27,487 |
| 35 |
27 |
31,763 |
26,469 |
| 35 |
28 |
30,628 |
25,523 |
| 29 |
24 |
29,607 |
24,673 |
| 29 |
25 |
28,423 |
23,686 |
| 29 |
26 |
27,330 |
22,775 |
| 29 |
27 |
26,318 |
21,931 |
| 29 |
28 |
25,378 |
21,148 |
Use the formula at left when you know what seed population you wish to plant and you want to determine the correct transmission setting for an unusual row width.
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A = Desired row width (in inches).
B = Row width column in Operator's Manual to which comparisons will be made.
C = Seed population you wish to plant.
D = The population value which you will to determine your actual sprocket combination using column "B" in the operator's manual.
The example assumes that you wish to plant corn with a vacuum meter on 711 mm (28 in.) rows (item A), that you will be using the 762 mm (30 in.) row column for comparison (item B), and that you wish to plant 28,000 kernels per acre (item (C).
The calculation shows that you should look in the 762 mm (30 in.) row column of the chart under 26,133 to find the correct sprocket combination. In this example, the operator's manual chart shows that a low-range input sprocket with a 29-tooth driver and a 27-tooth driven sprocket will give a population of 26,318 for 762 mm (30 in.) rows. That means on 711 mm (28 in.) rows, you will get approximately 28,000.
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