
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.
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.
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:
For New Zealand seed drills operating in variable soils, that consistency directly supports improved crop establishment.
Hydraulic depth adjustment is essential for flexibility in modern agricultural machinery. However, hydraulics operate on pressure and pressure can vary depending on:
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:
It’s practical engineering - not complicated engineering.
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:
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.
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:
For New Zealand agricultural equipment, that balance is essential.
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:
In precision seeding systems, small mechanical improvements compound into measurable outcomes across entire paddocks.

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.

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.
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