Roller Grader

• Grading shellfish by size for further processing or packaging.
• Sorting small to medium-sized produce such as potatoes, onions, or fruit.
• Separating various food items based on diameter or thickness.
• Use in food processing lines requiring consistent product sizing.
• Pre-sorting prior to washing, peeling, or packing operations.

Typical capacity

Typically ranges from 500 kg/hour to 5,000 kg/hour, depending on product type and desired throughput.

Power supply

Commonly requires a 3-phase electrical supply, typically 400V, 50Hz, with varying amperage based on motor size.

Number of grades

Units of this type commonly offer 3 to 7 distinct grades, allowing for precise size separation.

Roller material

Rollers are typically constructed from food-grade stainless steel or durable plastics suitable for wet environments.

Footprint

A roller grader of this class typically requires a floor space of 3 to 6 metres in length and 1.5 to 2.5 metres in width, plus access for conveyors.

Suitable feed sizes

Designed for products typically ranging from 10mm to 150mm in diameter, depending on roller spacing and configuration.

Construction material

The main frame and contact parts are generally made from stainless steel for hygiene and corrosion resistance.

• What maintenance is typically required for a roller grader?

  Routine maintenance usually involves cleaning, checking roller alignment, lubricating bearings, and inspecting conveyor belts for wear. Electrical components should also be periodically checked.

• Can roller graders handle delicate products?

• Is this type of equipment suitable for wet environments?

• How is the grading size adjusted?

• What are the benefits of using a roller grader over other sorting methods?

Sorting and grading equipment is valued for improving product consistency and processing efficiency. Buyers typically seek machines in good mechanical condition with minimal wear on critical components like belts, motors and calibration systems. Common strengths include reliable performance when properly maintained, cost savings versus new equipment, and compatibility with existing production lines. Industry sentiment favours models from established manufacturers known for durability. Buyers should inspect electrical systems thoroughly and verify spare parts availability before purchasing used units.

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