Curvetine™ closing wheels "chip-in" the sidewall compaction, produced by the vee-opener blades. They crumble the soil and promote lateral root penetration.
The pronounced curve, allows the tine ease out of the ground, without ejecting material like a straight tooth closing wheel. The thumblike tooth firms, and provides seed-to-soil contact.
1201R and 1201L Curvetine Closing Wheels
Curvetine™ XR Closing Wheel
This is the Curvetine XR Closing Wheel. It is made of high grade cast iron. Dawn Curvetines run on Timken tapered roller bearings. The hub is easily regreaseable. The aluminum supercap has a pronounced ridge that protects the grease zerk. The Curvetine XR does NOT require a drag chain or seed firmer! The wide, flat tooth snugs soil tight to the seed.
For John Deere planters use 1201R and 1201L. For Kinze and White planters use 1301R and 1301L. For Case planters, you would need to source a vee-style tailpiece from a third party to equip Curvetines.
Curvetine™ II Closing Wheel
This is the Curvetine II Closing Wheel. Like the Curvetine XR, It is made of high grade cast iron, and runs on Timken tapered roller bearings. The hub is easily regreaseable. The Curvetine II is designed for use on your John Deere or SDX drill.
For John Deere 750 drill with a triple-lip seal in the arm, order 1220-B R&L. For 750 and 1850 drills with bolt-on style closing wheels order 1220-TL R&L. For 1560-1895 JD drils with the bearing in the support arm at the upper end of the shaft, order 1225 R&L. Case SDX order 300275 R&L.
There are several ways to configure your planter tailpiece!
Depending on your tillage method, you may want to reconfigure your tailpiece. If you are primarily no-tilling, two Curvetines generally work very well. If you are no-tilling into mellow soil, or planting cotton or other small, shallow planted crops, you may benefit from the Curvetine pressplate. In conventionally tilled ground, you may consider using one Curvetine and one OEM rubber wheel. Inquire at your local dealer what configuration is most common setup in your area, or give us a call if you need assistance deciding what is the best option.
1/2 Rate down-pressure spring for your planter tailpiece!
If you like the action of two Curvetines, but have difficulty setting the spring rate to a light enough setting, we strongly recommend our half-rate spring.
This spring will allow you to use the full range of settings on your tail-piece. It also makes it possible to run two Curvetines per row in a much wider range of conditions.
In general we recommend the lighter down-pressure spring over equipping your Curvetines with pressplates.
1201 Curvetine™ XR
for John Deere 1700 Series.
If you have a 1700 series John Deere planter, or you have updated your older John Deere tailpiece to fit bolt-on style closing wheels, you will want to use the 1201 Curvetine™. This Curvetine uses the same shaft as Dawn Trashwheels. These wheels bolt on from inside the planter tailpiece. This wheel will not fit to a JD 7200/7300 or JD 7000/7100, unless you have updated your tailpiece.
1301 Curvetine™ XR
for Kinze and White planters.
If you have a Kinze or White planter you will want to use the 1301 Curvetine™ XR. This wheel bolts on from the outside. The shaft of the 1301 is hollow and threads on to a specialty washer that has been drilled with 8 small holes. These holes recieve the roll pins fixed to a keyed washer. The machined bittings on the washer fit into the keyway on the threaded end of the shaft.
Spacing
The Curvetine closing wheel works optimally when the distance between the teeth, tip to tip, at the bottom of travel (labeled "D" above) is approximately equal to the depth you are planting your seed. For example, in corn you should try to get your Curvetines around 2" apart. For John Deere planters the standard 3/8" spacer is typically good for corn and beans. For small, shallow planted crops like cotton, you should use the 3/16" spacer. Please call if you need assistance with proper spacing.
New Curvetine Dust Cover.
If your soil has high concentrations of fine particulates like blow sand or dry silt, you should equip your Curvetines with dust covers. In many environments, the dust covers may not be as essential, however, if you tend to have a buildup of fine dust on your closers, this dust cover will extend the life of your bearings.
Curvetine™ Manual
Curvetine™ Parts
