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Author: Site Editor Publish Time: 2026-10-30 Origin: Site
Rice quality is not determined by milling and polishing alone. After the husking and whitening stages, rice usually contains kernels of different lengths, whole grains, broken rice, and other small particles. Separating these materials into consistent grades is an important step for rice mills that supply wholesalers, food processors, distributors, and retail markets.
A rice grader machine helps classify milled rice according to kernel size and length. By separating whole rice from different sizes of broken rice, a suitable grading system can improve product consistency, support different market requirements, and increase the value of finished rice products.
For rice processors planning to upgrade their production facilities, understanding how a rice grading machine works and how to select the right equipment is essential.
A rice grader machine is a type of rice processing equipment used to separate milled rice into different size categories. It typically works with screening surfaces, sieves, or other separation mechanisms to classify rice kernels according to their physical dimensions.
During rice milling, the finished product may contain:
Whole rice kernels
Large broken rice
Small broken rice
Fine rice fragments
Other particles requiring separation
Without proper grading, these different materials may remain mixed together, resulting in inconsistent product quality.
A rice grading machine helps rice mills obtain more uniform finished products. Depending on the equipment configuration, it can be used as an independent grading unit or integrated into a complete rice milling line.
A rice grader generally separates rice through controlled feeding and screening. The exact working principle depends on the machine design and the type of grading required.
A typical grading process includes the following steps:
Step 1: Rice Feeding
Milled rice enters the machine through a feeding hopper. A uniform feeding rate helps distribute the material evenly across the grading surface.
Step 2: Screening and Separation
Rice passes through grading screens or other separation components. Different screen openings or separation structures allow kernels to be classified according to their size and length.
Step 3: Classification
The machine separates rice into different output categories, such as whole kernels, larger broken rice, and smaller broken rice.
Step 4: Separate Discharge
Each grade is discharged through its corresponding outlet for collection, further processing, or packaging.
The grading accuracy depends on several factors, including rice variety, moisture condition, feeding uniformity, screen specifications, and machine adjustment.
For commercial rice processors, a rice sorting machine is important because different buyers may require different rice specifications.
Separating rice by size helps produce more uniform batches. This is especially useful for mills supplying wholesalers, supermarkets, food manufacturers, and export markets.
Whole rice and broken rice often have different market values and applications. A grading system allows processors to separate these products rather than selling them as one mixed batch.
A rice mill may produce several grades for different customers. Proper grading makes it easier to organize finished rice according to buyer requirements.
When grading equipment is correctly matched to the milling line, operators can manage the separation process more consistently and reduce unnecessary manual sorting.
The appropriate grading equipment depends on the rice product, processing capacity, and required separation accuracy.
A rice length grader separates rice according to kernel length. It is commonly used when processors need to distinguish whole kernels from broken pieces of different lengths.
This equipment is useful for rice mills that supply multiple product grades or need more controlled separation of broken rice.
A vibrating rice grader uses controlled vibration to move rice across screening surfaces. Different screen openings can separate materials according to their dimensions.
This type of equipment is suitable for grading operations where stable material movement and consistent screening are important.
For small rice mills and local processing workshops, an integrated rice milling machine may combine several processing functions in one unit.
Depending on the model, these functions can include cleaning, husking, whitening, polishing, and basic separation.
For example, TEHOLD's SB Series Rice Milling Machine combines multiple processing stages in a compact configuration and offers different capacity options for small-scale operations.
Choosing a suitable rice grader machine requires more than comparing equipment prices. Buyers should consider the actual rice processing requirements and the performance of the complete production line.
Start by identifying the daily or hourly output of your rice mill.
The grading equipment should be able to handle the output from the upstream milling process. If its processing capacity is too low, it may become a production bottleneck.
When comparing machine specifications, confirm whether the stated capacity refers to input material or finished rice output.
Different markets have different requirements for whole rice and broken rice.
Before selecting a machine, determine whether you need to separate:
Whole rice kernels
Large broken rice
Small broken rice
Different kernel lengths
Other rice fractions
The required grading categories will influence the machine structure and screening configuration.
A grading machine should work smoothly with the other equipment in your rice processing line.
Consider the capacity of the rice whitener, polisher, conveyors, elevators, and packaging equipment. The entire line should operate at a balanced production rate.
For buyers planning a complete processing system, explore TEHOLD's Rice Mill Machine range.
Regular inspection and maintenance are important for long-term machine operation.
Buyers should check whether screens and other wear components are easy to access and replace. They should also confirm the availability of spare parts and technical support.
A reliable equipment supplier should be able to understand your raw material, required capacity, finished rice specifications, and factory layout.
Before purchasing, provide the supplier with basic project information and request a suitable equipment configuration.
A rice grader is usually one part of a larger rice processing system. Its position and configuration depend on the production process and the quality requirements of the finished rice.
A typical commercial rice milling process includes:
Paddy Cleaning: Removes dust, straw, stones, and other impurities from raw paddy.
Paddy Husking: Removes the outer husk using a rice husker.
Paddy Separation: Separates unhusked paddy from brown rice.
Rice Whitening: Removes bran layers from brown rice.
Rice Polishing: Improves the surface appearance of milled rice when required.
Rice Grading: Separates whole kernels and broken rice into different categories.
Color Sorting: Removes discolored or defective kernels when required.
Packaging: Weighs and packs finished rice for storage or distribution.
Not every rice mill requires all these machines. The final configuration should be based on raw paddy quality, processing capacity, product specifications, available space, and investment budget.
For small processing facilities, an integrated rice mill may be sufficient. Larger commercial plants may require separate machines for each processing stage.
TEHOLD provides rice milling equipment for different processing requirements, from compact combined machines to larger rice processing systems.
Its Rice Mill Machine product category includes rice milling equipment, rice graders, and rice separators.
The SB Series Rice Milling Machine is designed for rural processing facilities and small workshops. It combines husking and whitening functions and is available in several capacity configurations.
Published SB Series specifications include:
Model | Listed Capacity | Power |
|---|---|---|
SB-5 | 400–600 kg/h | 5.5 kW / 8–10 HP |
SB-10 | 700–1,000 kg/h | 11 kW / 15 HP |
SB-30 | 1,100–1,500 kg/h | 15 kW / 18 HP |
SB-50 | 1,800–2,300 kg/h | 22 kW / 30 HP |
These figures are the published capacities of the integrated rice milling machines, not the independently rated throughput of a standalone rice grader. Actual output can vary with paddy variety, moisture content, operating conditions, and machine configuration.
For a larger rice processing project, buyers should evaluate the capacity and performance of every processing stage before finalizing the equipment arrangement.
The main function is to separate milled rice into different categories according to kernel size or length. It helps processors distinguish whole rice from broken rice and produce more consistent finished products.
A rice grader separates rice mainly according to physical dimensions, such as length or size. A color sorter identifies and removes discolored or defective kernels based on optical characteristics.
They perform different functions and may both be used in a commercial rice processing line.
Yes. A suitable rice grading machine can separate whole kernels and broken rice according to their dimensions and the machine's grading configuration. The separation result depends on rice variety, kernel condition, screen design, and operating settings.
Not always. Some compact rice milling machines include basic separation functions. A separate grading machine may be more suitable when a mill needs multiple rice grades, higher processing capacity, or more specialized separation.
Consider your required capacity, rice variety, target product grades, existing equipment, available space, and maintenance requirements. Providing these details to the supplier helps determine a suitable machine configuration.
In many cases, yes. However, the available space, material flow, output capacity, conveyor arrangement, and electrical requirements should be checked before installation.
Selecting the right rice grader machine can help improve finished rice consistency and make commercial rice processing more organized.
Whether you operate a small rice mill or plan to establish a larger processing facility, the equipment configuration should match your raw material, production target, and local market requirements.
TEHOLD supplies rice milling equipment and processing solutions for different project scales.
Contact our team to discuss your rice processing requirements, including:
Required processing capacity
Raw paddy type and moisture condition
Target rice grades
Existing equipment and factory layout
Power supply and installation conditions
Contact TEHOLD today to discuss your rice milling project and request a suitable equipment proposal.
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