O’Mara R&P (Rack and Pinion) Slide Gates are heavy-duty mechanical flow-control devices designed to regulate, meter, and completely shut off the movement of grain, seed, and other bulk materials in agricultural and processing systems.
Built with rugged steel, precision-machined gears, and smooth sliding blades, these gates provide accurate control, dependable shut-off, and long service life, working hard day after day from bin discharge to final load-out.
Whether you are discharging a silo, feeding a conveyor system, or blending seed, O’Mara R&P slide gates deliver consistent, operator-controlled performance exactly where your system needs it most.
A rack and pinion slide gate is a mechanical shut-off and flow-control valve used to manage dry bulk materials such as:
The gate works by converting rotational motion into straight-line movement:
Because the motion is gear-driven and positive, operators have precise, repeatable control over grain flow more accurate than with simple pull gates or gravity grain doors.
Rack-and-pinion gears allow the gate to open in small, controlled increments, helping you:
A tight-sealing slide blade stops material movement when closed, which is critical for:
R&P gates provide steady, predictable grain release into trucks, railcars, or belt conveyors—reducing:
Because gears physically engage the rack, the gate:
Incremental positioning supports accurate volumetric control for feed production, seed blending, and ingredient mixing.
Heavy-gauge steel frames, machined gearing, and bearing-supported shafts handle high material weight and frequent cycling.
Blade wipers and tight seals reduce seed damage, cracking, and cross-contamination, making these gates ideal for seed facilities.
Simple mechanical design means:
Suitable for:
O’Mara R&P slide gates are widely used throughout agricultural facilities, including:
Anywhere dependable mechanical grain flow control is required, an R&P slide gate plays a critical role.
R&P slide gates can be operated in several ways depending on your facility’s needs.
O’Mara helps you choose the right drive method for safety, efficiency, and budget.
Seed processing demands clean flow paths and minimal carry-over between varieties.
O’Mara R&P gates are engineered to:
This makes them a trusted choice for seed conditioning, treating, and packaging systems.
No two facilities are the same. O’Mara designs R&P slide gates to match your exact process.
We consider:
The result is a clean-fitting, smooth-operating gate that performs reliably from the first load onward.
Every O’Mara R&P Slide Gate is engineered and manufactured in the USA using proven materials and precision fabrication.
With decades of experience in grain, seed, and bulk material equipment, O’Mara delivers practical, real-world solutions built for demanding agricultural use.
Our in-house capabilities include:
From a single slide gate to a complete grain system, we design ag products that deliver real-world results.
If you need a stronger shut-off, more accurate metering, or dependable long-term operation, an O’Mara Rack & Pinion Slide Gate is a proven solution for grain, seed, and feed handling systems.
Let our team of experienced engineers help you select the right size, configuration, and drive option for your bins, conveyors, and load-out equipment.
Contact O’Mara today for a Free Quote
