Great Plains NTA2007 Material Rate - Manual (Page 51)

Great Plains Manufacturing, Inc. Contents Appendix Appendix 49
2012-01-03 Contents Appendix 167-085B
Small Seeds Rate Charts
The charts on page 50 through page 61 are for smaller
seeds when using a meter that has the optional Small
Seeds flute shaft installed.
Refer to Figure 19 (which depicts the 4-of-6 outlet style flute
shafts used on Models NTA907/3007/HD)
Standard seed meters have shafts
with two deep
fluted wheels (“stars”) and two filler rings in each active
meter compartment.
An alternate flute shaft is available for small seeds .
Part numbers vary by drill model. Consult the Options
section of your Operator Manual for ordering information.
The Small Seeds accessory replaces the existing 2-star
shaft assembly
with one having a shallower and
narrower star configuration. This provides lower seeding
rates for the same Range and variable rate gearbox
setting. See “Changing Meter Flutes” in your drill
Operator Manual for installation instructions.
For small seeds (see list at right) or other seeds smaller
than 12
×4.7 mm ( 1 ⁄
2
× 3 ⁄
16
inch), the standard shaft may
not provide sufficient precision and uniform flow at very
low rates. The small seeds flute shaft
is available that
provides two half-width shallow flute stars per
compartment.
For compatible seeds, replacing the standard 2-star shaft
with the small seeds shaft
reduces the seeding rate by
approximately 50 to 80% (to a net 50% to 20% of
standard rate).
2
s
Figure 19
Exchanging Flute Shafts
32398
2
s
2
s
s