| IN-LINE SEED SPACING RATE CHART | |||||||||||||
| Based on 72 Inch Drive wheel circumference | |||||||||||||
| #40 ROLLER CHAIN | |||||||||||||
| DRIVE | DRIVEN SPROCKET (# OF TEETH) | ||||||||||||
| SPROCKET | 60 | 58 | 56 | 54 | 52 | 51 | 48 | 45 | 42 | 38 | 36 | 32 | 29 |
| 10 | 7.71 | 7.46 | 7.20 | 6.94 | 6.68 | 6.55 | 6.17 | 5.79 | 5.40 | 4.88 | 4.63 | 4.11 | 3.73 |
| 11 | 7.01 | 6.78 | 6.55 | 6.31 | 6.07 | 5.96 | 5.64 | 5.26 | 4.91 | 4.44 | 4.20 | 3.74 | 3.39 |
| 12 | 6.43 | 6.21 | 6.00 | 5.79 | 5.57 | 5.46 | 5.14 | 4.82 | 4.50 | 4.07 | 3.85 | 3.43 | 3.11 |
| 13 | 5.93 | 5.74 | 5.54 | 5.34 | 5.14 | 5.04 | 4.75 | 4.45 | 4.15 | 3.76 | 3.56 | 3.16 | 2.87 |
| 14 | 5.51 | 5.33 | 5.14 | 4.96 | 4.77 | 4.68 | 4.41 | 4.13 | 3.86 | 3.49 | 3.31 | 2.94 | 2.66 |
| 15 | 4.97 | 4.80 | 4.63 | 4.45 | 4.35 | 4.11 | 3.86 | 3.60 | 3.26 | 3.08 | 2.57 | 2.49 | |
| 16 | 4.66 | 4.50 | 4.34 | 4.17 | 4.09 | 3.86 | 3.62 | 3.37 | 3.05 | 2.89 | 2.57 | 2.33 | |
| 17 | 4.39 | 4.24 | 4.08 | 3.93 | 3.85 | 3.63 | 3.40 | 3.18 | 2.88 | 2.72 | 2.42 | 2.19 | |
| 18 | 3.86 | 3.71 | 3.64 | 3.43 | 3.21 | 3.00 | 2.71 | 2.57 | 2.29 | 2.07 | |||
| 19 | 3.65 | 3.52 | 3.45 | 3.25 | 3.04 | 2.84 | 2.57 | 2.43 | 2.17 | 1.96 | |||
| 20 | 3.47 | 3.34 | 3.27 | 3.08 | 2.89 | 2.70 | 2.44 | 2.31 | 2.06 | 1.86 | |||
| 21 | 3.31 | 3.18 | 3.12 | 2.94 | 2.75 | 2.57 | 2.33 | 2.20 | 1.96 | 1.78 | |||
| 22 | 3.16 | 3.04 | 2.98 | 2.80 | 2.63 | 2.45 | 2.22 | 2.10 | 1.87 | 1.69 | |||
| 23 | 3.02 | 2.90 | 2.85 | 2.68 | 2.51 | 2.35 | 2.12 | 2.01 | 1.79 | 1.62 | |||
| 24 | 2.79 | 2.73 | 2.57 | 2.41 | 2.25 | 2.04 | 1.93 | 1.71 | 1.55 | ||||
| 25 | 2.67 | 2.62 | 2.47 | 2.31 | 2.16 | 1.95 | 1.85 | 1.65 | 1.49 | ||||
| 26 | 2.57 | 2.52 | 2.37 | 2.22 | 2.08 | 1.88 | 1.78 | 1.58 | 1.43 | ||||
| 29 | 2.48 | 2.42 | 2.28 | 2.14 | 2.00 | 1.81 | 1.71 | 1.52 | - | ||||
| 28 | 2.39 | 2.34 | 2.20 | 2.07 | 1.93 | 1.74 | 1.65 | 1.46 | - | ||||
| 29 | 2.30 | 2.24 | 2.13 | 1.99 | 1.86 | 1.68 | 1.60 | 1.42 | 1.28 | ||||
| 32 | 2.09 | 2.04 | 1.93 | 1.81 | 1.69 | 1.53 | 1.45 | 1.28 | 1.17 | ||||
| 36 | 1.82 | 1.71 | 1.61 | 1.50 | 1.36 | 1.29 | 1.14 | 1.04 | |||||
| 42 | 1.56 | 1.47 | 1.38 | 1.29 | 1.16 | 1.10 | 0.98 | 0.89 | |||||
| 45 | 1.46 | 1.37 | 1.29 | 1.20 | 1.09 | 1.02 | 0.91 | 0.83 | |||||
| 51 | 1.13 | 1.06 | 0.96 | 0.91 | 0.81 | 0.73 | |||||||
| Formula to determine seed placement in inches: measure the circumference of the planter drive wheel (normally 72 inches approximately), then divide by 56 (the number of teeth in the seed plate), then multiply that factor by the number of teeth in the driven sprocket (typically 51), then divide that factor by the number of teeth in the drive sprocket = the seed drop in inches. PLEASE NOTE: Drastic sprocket changes may require repositioning of the drive chain idler. Any sprocket change generally will require a corresponding addition or subtraction in the amount of drive chain. | |||||||||||||