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Retrofit Double Discs from No Till Retrofit Leaders in Ag - RFM NT

If you’re considering upgrading your tine machine, the RFM NT Retrofit Double Discs are the perfect double disc seeder conversion option. They’re proving around the world to be a preferred alternative to buying a new machine.


The continually changing practices of cultivation, heavier bars, interrow sowing and reduced livestock trampling the ground between crops, has meant conditions for the usage of discs in cropping programs is much preferred these days.


The double disc system can convert most machines manufactured in the last 30 years into a disc seeder.


This low-cost system makes light work of stubble and trash conditions in all soil types, therefore, allowing 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 can get their crop in the ground 30 per cent faster than average, which in turn means they are going to use 30 per cent less fuel. 

Superior penetration and cutting

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


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. The lead disc is an inch forward from the plain coulter disc, which in turns allows for greater penetration and cutting and ultimately avoiding hairpinning.


The plain and serrated coulters 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 also help to alleviate blocking. Another notable feature is that the system can double chute.


This multipurpose system can turn any conventional tyne planter into a highly versatile disc planter.


Farmers can quickly change over their machine to the disc system and easily convert it back, should the condition require it. The design of the disc system allows it to fit existing tine trip assemblies. Farmers can take out 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 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 RFM NT Press Wheels, even more, exciting results can be be seen.


The idea for the double discs was thought of by 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.


Whats in it for you

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 Retention

  • Greater yields.

Double Bevel Discs

  • For ease of penetration

  • Plates are recessed to handle rough conditions

Recessed design

  • Adds reinforcement to handle rough conditions.

30mm Offset axles

  • For ease of penetration and cutting

Heavy duty axle system

  • Handles harsh conditions.

Reduced draft

  • Up to 50% less fuel required.

Seeding Boot Bracket

  • Up to 50% more productivity.

Front seed boot

  • Excellent seed placement combined with v-shaped cutting into the furrow.

High Quality Tapered Bearings

RFM NT hub cutaway with tapered bearings

Hub cutaway

  • Reduced downtime for maintenance.

Spring Loaded Tungsten Scrapers

  • Longer wearing.
  • Noticeable Reduced mud build-up.

Adjustment Spacers

  • Adjust the cutting edge between the two discs when wear happens.

Large range of adapters and shanks

  • Different designs to retrofit to different tyne assemblies.
Paul Ryan with RFM NT Double Discs RFM NT.


Disc OD:






Disc Weight:

18″ (450mm)



Hardened cast steel



  • 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, Bourgault, Conservapac, Ezee On, Flexicoil, Horwood Bagshaw, Gason, Gyral, Janke, John Shearer, John Deere, Morris, Simplicity and Smale 

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Retrofit Double Discs