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RAM Spacers for Seed Drills

 RAM spacers are mechanical depth-stop collars fitted to hydraulic cylinders on seed drills. 


They physically limit ram travel to ensure consistent working depth, improved seeding accuracy, and protection of hydraulic components. 

Mechanical Depth Control for New Zealand Farming

Additional Information

In New Zealand farming conditions, from Canterbury plains to rolling hill country - consistent seed depth is critical for even germination, crop performance, and efficient input use. RAM spacers provide mechanical certainty where hydraulics alone rely on pressure.


What Are RAM Spacers on a Seed Drill?


RAM spacers are precision-engineered collars installed onto hydraulic rams. Their function is simple but important: they create a fixed mechanical stop point that prevents the cylinder from extending beyond a predetermined depth setting.


Unlike hydraulic-only adjustment systems, which rely on fluid pressure and operator judgement, RAM spacers provide a physical limit.

That means:

  • Consistent working depth across the paddock
  • Repeatable setup between jobs
  • Reduced over-extension of hydraulic cylinders
  • Less guesswork from the cab


For New Zealand seed drills operating in variable soils, that consistency directly supports improved crop establishment.


Why Depth Control Isn’t Just a Setting


Hydraulic depth adjustment is essential for flexibility in modern agricultural machinery. However, hydraulics operate on pressure and pressure can vary depending on:

  • Soil resistance
  • Ground contour
  • Machine load distribution
  • Extended operating hours


Over hectares of drilling, even small variations can translate into inconsistent seed placement. In NZ conditions, being 5mm too deep or too shallow across a paddock can affect emergence timing and uniformity.


RAM spacers remove that variable.


Once fitted:

  • The ram cannot travel past its mechanical stop
  • Frame geometry remains stable
  • Working depth becomes repeatable
  • Operator variability is reduced

It’s practical engineering - not complicated engineering.


Built for Variable New Zealand Conditions


New Zealand paddocks are rarely uniform. Stones, undulations, moisture variability and changing soil types are common across both North and South Island farming systems.


RAM spacers support seed drill performance by:

  • Maintaining consistent depth in uneven terrain
  • Protecting hydraulic cylinders from over-extension
  • Supporting stable frame geometry
  • Reducing setup drift during long drilling runs


They are not the most visible component on a drill, but they are one of the quiet contributors to long-term machine reliability and consistent seeding performance.


Hydraulics + RAM Spacers: Flexibility and Certainty Combined


The strongest seed drill systems combine hydraulic flexibility with mechanical control.

Hydraulics allow operators to adjust quickly when conditions change. RAM spacers allow operators to lock depth settings with confidence.


Together, they deliver:

  • Adjustable configuration
  • Mechanical reliability
  • Reduced wear over time
  • Greater operator confidence


For New Zealand agricultural equipment, that balance is essential.


Why Small Engineering Details Matter


At Boon Agriculture, innovation is not limited to large visible components. Many performance gains come from thoughtful mechanical decisions that improve consistency and durability.


RAM spacers influence:

  • Depth consistency
  • Crop establishment quality
  • Hydraulic component longevity
  • Overall seed drill performance


In precision seeding systems, small mechanical improvements compound into measurable outcomes across entire paddocks.

Frequently Asked Questions

Please reach us at Andrew@boon.ag if you cannot find an answer to your question.

 No. RAM spacers work alongside hydraulic systems. Hydraulics allow adjustment; spacers provide a fixed mechanical stop to ensure depth consistency once the desired setting is reached. 


 They physically limit how far a hydraulic ram can extend. This prevents gradual depth drift caused by pressure variation, helping maintain uniform seed placement across the paddock. 


 Yes. In undulating or uneven terrain, mechanical stop points help maintain frame stability and consistent working depth, which supports more even crop establishment. 


 Yes. By preventing over-extension and limiting excessive cylinder travel, RAM spacers can help reduce mechanical strain and extend component lifespan. 


Practical Engineering for Real New Zealand Farming

 

For farmers researching seed drills in New Zealand, depth control is one of the most important performance factors to evaluate.


RAM spacers are a simple, mechanical solution that supports consistent drilling depth, improved crop establishment, and long-term equipment durability.


If you’re evaluating agricultural machinery or looking to better understand how seed drills maintain precision in NZ conditions, our team is always available for a practical engineering conversation.

No hard sell.

Just well-built equipment designed for real farming.

If you’re curious how your drill manages load and wear

we’re always up for a proper engineering conversation.
we’re always up for a proper engineering conversation.
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