Upgrade your tine machine by converting it to double discs with the Ryan NT (formerly RFM NT) Retrofit Double Discs.


Retrofit Double Discs from THE No-Till FARM MACHINERY Leaders - RYAN NT (FORMERLY RFM NT)

If you’re considering upgrading your tine machine, the Ryan NT (formerly RFM NT) Retrofit Double Discs are the perfect double disc seeder conversion option. Around the world, these agricultural discs are proving to be a preferred alternative to buying a new machine. The changing practices of cultivation and no-till farm equipment, heavier bars, interrow sowing and reduced livestock trampling the ground, has meant conditions for the usage of discs in cropping programs is preferred these days.


The double disc system can convert most crop planting machines manufactured in the last 30 years into a disc seeder. The disc coulters, of this low-cost farming system make light work of stubble and trash conditions in all soil types. It allows farmers to plant early in dry conditions without making a mess or blocking up in the wet.


Most importantly, this system allows you to retain more moisture when seeding than a standard tyne point system. Furthermore, with the disc system, farmers are planting their crop in the ground 30 per cent faster than average, which in turn means they are using 30 per cent less fuel.

Superior penetration and cutting

Standard agricultural double disc systems commonly have the disc coulter side by side, which can be prone to act as a wedge, making it harder for penetration.


Ryan NT (formerly RFM NT)’s unique double disc opener system features unique offset disc coulters, which allow extra penetration and easier cutting, compared to the standard wedged designs. The lead disc is the driving disc on the ground and is an inch forward from the plain coulter disc. This allows for greater penetration and cutting and no hairpinning.


The plain and serrated coulters of this machinery retrofit work together to give you good tilth and enough soil through for chemical incorporation. It also features a unique front seeding boot design which avoids blocking and gives perfect seed or fertiliser placement by placing it directly at the bottom of the trench. In addition to this, the unique spring-loaded scrapers can help alleviate blocking. Another notable feature is that the system can double chute.


Click here for more info on the scrapers.


This multipurpose system can turn any conventional tyne planter into a highly versatile disc planter, making it a handy piece of farming equipment. Farmers can quickly change over their crop planting machine to the disc system and easily convert it back, should the conditions require it. The design of this retrofit machinery disc system easily fits to existing tine trip assemblies. 


Farmers can remove their current shank from the tine trip assembly and replace it with our matching shank. For most setups to switch over, it only requires undoing a couple of bolts or a pin.


In conclusion, with the Ryan NT (formerly RFM NT) Double Discs, you do not have to purchase an expensive new disc seeder. Instead, you can easily convert your existing planting tyne trip for dual purpose. Additionally, when using the double discs with the Ryan NT Press Wheels you will see another increase in results.


Ryan NT has a long history of designing discs for farming and other no-till farm equipment. The idea for the double discs came from the Ryan family in around 1983, which means they have refined it for nearly 40 years. Across Australia and the globe, the double discs are proven; notably, programs in eastern Europe have successfully integrated them.

18" (450mm) diameter Plain & Serrated Discs

Greater cutting.


Plant in harder conditioners than traditional wedge design.


20 – 30% higher speeds than tynes, depending on conditions.


The serrated lead disc sits 25mm in front of the plain disc to improve penetration.

15 degree working angle

No hairpinning.


Cut through challenging stubble, whether that be canola or cereal.

Moisture RetentionGreater yields.
Double Bevel Discs

For ease of penetration


Plates are recessed to handle rough conditions

Recessed designAdds reinforcement to handle rough conditions.
30mm Offset axlesFor ease of penetration and cutting
Heavy duty axle systemHandles harsh conditions.
Moisture RetentionGreater yields.
Reduced draftUp to 50% less fuel required.
Seeding Boot BracketUp to 50% more productivity.
Front seed bootExcellent seed placement combined with v-shaped cutting into the furrow.

High-Quality Tapered Bearings

Ryan NT (RFM NT) hub cutaway with tapered bearings

Hub cutaway

Reduced downtime for maintenance.
Spring Loaded Tungsten Scrapers

Longer wearing.


Noticeably reduced mud build-up.

Adjustment SpacersAdjust the cutting edge between the two discs when wear happens.
Large range of adapters and shanksDifferent designs to retrofit to different tyne assemblies.

Disc OD: 18” (450mm)
Disc Thickness: 4mm
Material: Hardened cast steel
Disc Weight: 4kg

Single chute or double chute.
Rear small seeds boot.
Double plain disc combination to reduce throw when pasture seeding.
Standard Combination for most broadacre planting applications.
Various disc shank models.

Models for:
  • RFM,
  • AFM,
  • Allan Johns,
  • Ausplow DBS,
  • Boss,
  • Bourgault,
  • Conservapac,
  • Equalizer,
  • Ezee On,
  • Flexicoil,
  • Horwood Bagshaw,
  • Gason,
  • Gyral,
  • Janke,
  • John Shearer,
  • John Deere,
  • Morris,
  • Simplicity and
  • Smale.

paul ryan double discs field days display stand


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Ryan NT Retrofit Double Discs

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