No Broken Rice in Fine, No Fine in Broken
The standard a modern mill is judged by is simple: the fine rice should contain no broken kernels, and the broken rice stream should contain no whole grains. The Goldilocks MDJY length classifier is built to hold that standard. Its three rotating perforated drums work on the length difference between fine rice and broken rice, selecting each fraction into its own stream, so both outlets come out uniform. The machine is used in the final processing stage, normally combined with the white rice grader, and it handles 0.8 to 4.5 tons per hour across four models, from the MDJY50x1 to the MDJY71x2. Power stays modest at 0.75 to 2.2 kilowatts, and the straightforward drum drive keeps maintenance simple. For a mill that sells fine rice at a premium and broken rice at a separate price, this machine is not an extra: it is the difference between one grade and two clean grades.
Length Classifier That Works with Your Rice Grader
A white rice grader sorts rice by thickness and size, but it cannot separate whole grains from broken rice by length. That is the job of the length classifier, and the two machines are designed to work in sequence. The Goldilocks MDJY series sits behind the grader in the line, taking the graded product and splitting fine rice from broken rice by length, so the fine stream is clean and the broken stream is uniform. This combination is the standard setup in modern rice milling: no broken rice left in fine rice, no fine rice left in broken rice. The four models cover 0.8 to 4.5 tons per hour, matching graders at the same capacity, and the compact dimensions let the mill place the classifier right beside the grader. When Goldilocks quotes a complete line, the classifier is sized against the grader output, so the pair works as one balanced stage.
Products Introduction
MDJY50×1
The MDJY50x1 is the entry model of the MDJY length classifier series, grading 0.8 to 1 ton per hour on 0.75 kilowatts with dimensions of 2770 by 720 by 900 millimeters. It uses perforated drums to separate fine rice from broken rice by length, normally combined with the white rice grader in the final stage, leaving no broken rice in the fine stream, and suits small mills and village processing points.
MDJY50×2
The MDJY50x2 is a two-drum length classifier in the MDJY series, grading 1.5 to 2 tons per hour on two 0.75 kilowatt drives with dimensions of 3080 by 720 by 1650 millimeters. It separates fine rice from broken rice by length, normally sitting behind the white rice grader, so the fine stream leaves clean and the broken stream uniform, suiting medium commercial mills with larger output.
MDJY50×3
The MDJY50x3 is a three-drum length classifier in the MDJY series, grading 2 to 2.5 tons per hour on three 0.75 kilowatt drives with dimensions of 3080 by 720 by 2450 millimeters. Its three perforated drums separate fine rice from broken rice by length behind the white rice grader, finishing the final separation, and it suits 10 to 30 ton commercial mills supplying clean, uniform fine rice to shops and wholesalers.
MDJY71×2
The MDJY71x2 is the high-capacity length classifier of the MDJY series, grading 4 to 4.5 tons per hour on a single 2.2 kilowatt drive with dimensions of 2770 by 720 by 1800 millimeters. Its wider perforated drums separate fine rice from broken rice by length, matching the output of a large grader, and it suits 40 to 100 ton plants and complete lines, keeping the packing line supplied with clean fine rice free of broken kernels.
Rice Length Classifier for Clean Fine Rice
The rice length classifier is the machine that separates fine rice from broken rice by length, finishing the product that the mill has graded and polished. It works on the difference in length between whole grains and fragments: three perforated drums rotate, catching the shorter broken kernels and diverting them into their own outlet, while the fine rice continues in the main stream. The Goldilocks MDJY series is built around this principle, with four models covering 0.8 to 4.5 tons per hour and power from 0.75 to 2.2 kilowatts. The machines are used in the final stage of rice processing, normally combined with the white rice grader, so that no broken rice is left in fine rice and no fine rice is left in broken rice. Every modern rice milling factory that wants a uniform final product needs this dedicated equipment, and the published dimensions make the layout simple to plan in advance. The machine pays for itself through the higher price of clean fine rice, and the uniform broken stream sells separately, which makes the classifier a profitable stage rather than an extra cost.
How Three Drums Split Fine Rice from Broken
Understanding the length classifier starts with the drum, because the drum does the sorting. Inside the Goldilocks MDJY machine, three perforated drums rotate continuously, and the rice is fed evenly across their surfaces. The perforations are sized so that short broken kernels drop into the pockets and are carried out through the reject path, while whole grains, being longer, ride over the holes and stay in the fine stream. The rotation keeps the rice moving and prevents the holes from packing, so the separation stays consistent through a full shift. Because the sorting is mechanical and length-based, the result does not depend on color or surface condition, which makes the machine reliable for many rice varieties and for milled rice of different whiteness. The drums are made of punched steel plate, so they resist wear and keep their perforation over years. Simple to understand, simple to maintain, and effective: that is the design logic of the MDJY series. The feed is spread evenly by a simple distributor, and the three drums work together so the separation is thorough in a single pass, which keeps the machine compact for its capacity.
How to Choose the Right Classifier Capacity
Choosing a length classifier starts with the output it has to clean, because the machine has to keep up with the grader and the packing line. If your mill processes about one ton per hour, the MDJY50x1 at 0.8 to 1 ton fits. At 1.5 to 2 tons, the MDJY50x2; at 2 to 2.5 tons, the MDJY50x3. For the larger plants, the MDJY71x2 covers 4 to 4.5 tons per hour with a single 2.2 kilowatt drive. The second question is the line position: the classifier normally sits after the white rice grader and before the packing scale, so its feed is the graded fine rice that still contains some broken kernels. The third question is the space: the dimensions are published for every model, and the machine stands beside the grader with simple chutes. Finally, consider the power available: 0.75 to 2.2 kilowatts is small for any plant. With published capacity, power and dimensions, the right model usually chooses itself from the table. The classifier normally replaces hand picking, so the comparison is not only against other machines but against the cost and inconsistency of manual labor, which makes the published capacity even easier to value. The factory can also advise on the right model for your line.
Sell Fine and Broken Rice as Two Clean Grades
Rice that is sold mixed, with broken kernels scattered through the fine rice, earns the lowest price in every market. Rice that is clean, with no broken kernels in the fine stream, earns the premium. The length classifier is the machine that makes the second outcome possible, and the Goldilocks MDJY series does it at 0.8 to 4.5 tons per hour across four models. The machine separates fine rice from broken rice by length, so the mill gets two clean streams instead of one mixed product: fine rice at the full price, and broken rice sold separately for congee, snacks or flour. The value of the broken stream is not small; in a large mill it adds up to a steady secondary income.
The machine pays for itself through the price difference on the fine rice and the separate value of the broken rice, and the payback is usually measured in months. Modest power from 0.75 to 2.2 kilowatts keeps the running cost low, and the simple drum design keeps maintenance predictable. The machine runs steadily through the whole shift, and the drums hold their perforation over years, so the two clean grades stay clean without constant adjustment. That combination of a higher fine price and a saleable broken stream is what makes the classifier one of the fastest-paying machines in the line.
Grader Plus Classifier: the Final Quality Stage
The final quality of milled rice is decided by two machines working together: the white rice grader and the length classifier. The grader sorts the milled rice by thickness and size, removing the particles that do not meet the grade, and the classifier then separates fine rice from broken rice by length. Neither machine can do the other’s job, which is why they are designed to run in sequence. The Goldilocks MDJY series is built for this pairing, sitting behind the grader and taking its product, so that no broken rice is left in fine rice and no fine rice is left in broken rice. The four models cover 0.8 to 4.5 tons per hour, matching graders of the same capacity, and the dimensions are published so the two machines can be placed side by side with short chutes between them. When Goldilocks quotes a complete line, the classifier is sized against the grader output, and the pair is balanced as one stage. For a mill that already has a grader, adding the right MDJY classifier completes the quality chain without replacing anything. This arrangement is what buyers mean when they speak of a complete milling system: every stage hands its product to the next one in a known order. The classifier also protects the work of the polisher and the grader, because the clean separation shows off their performance in the final bag. For mills that already run a grader, adding the classifier is a small investment that completes the quality stage without changing the rest of the line.
ISO 9001 Quality Behind the MDJY Classifier
Quality in a length classifier is measured in consistent separation, durable drums and reliable drives, and the Goldilocks factory builds those qualities on a documented system. The plant in Hunan holds ISO 9001:2015 certification and is registered as a high-tech enterprise and a science-and-technology SME. Production follows written procedures: incoming drums and drives are checked, the perforation pattern of each drum is verified, and each classifier is assembled by a team working to the same drawing set. Before shipment, every machine is run with a test sample of mixed fine and broken rice, and the separation result is recorded against the specification. The quality system also covers the paperwork an exporter lives on: a consistent specification sheet, a correct parts list and a manual that matches the machine in the crate. Certification is maintained by audits, not by a certificate on the wall. For a buyer who cannot visit every factory, the ISO 9001 system is a useful filter: it means the factory has organized its process so that what you order is what you get. Combined with published specifications and factory-direct sales, the quality system is one more reason why Goldilocks classifiers come with fewer surprises, and why the separation you saw in the test run is the separation you get in your own mill, season after season.
The documented system also makes communication easier across languages: when the factory says a machine is tested and packed, there is a record behind the statement, and the buyer can ask for the test photos. For a buyer on the other side of the world, that traceability is a form of trust that a handshake cannot provide. The same records feed the after-sales service: when a mill orders a drum or a drive, the factory can confirm the fit against the original build sheet. In a decade of exports, this system has kept the questions few and the answers accurate.
More Features for Products
Small Mills and Village Processing
The MDJY50x1 separates 0.8 to 1 ton per hour for small mills and village processing points. A single 0.75 kilowatt drive, compact dimensions and simple drum design fit a one-room mill that sells clean fine rice to local shops.
Medium Commercial Rice Mills
The MDJY50x2 and MDJY50x3 separate 1.5 to 2.5 tons per hour for commercial mills supplying shops and wholesalers. The fine stream leaves clean and the broken stream sells separately, which raises the value of every ton processed.
Large Mills and Complete Lines
The MDJY71x2 separates 4 to 4.5 tons per hour for large plants and complete lines. It matches the output of a big grader, keeping the packing line supplied with clean fine rice through the whole shift.
Export-Grade Fine Rice Assurance
Export buyers reject containers on broken kernels in the fine stream. The MDJY series removes them by length, so the export product stays uniformly clean, lot after lot, protecting the brand and the next order.
Final Stage with the White Rice Grader
The classifier normally works behind the white rice grader, finishing the separation by length. Together they form the standard final quality stage of modern rice milling, for mills of every scale.
Broken Rice Grading and Reuse
The uniform broken stream from the classifier is a saleable product: congee, snacks or flour. Mills turn what was once a waste fraction into a steady secondary income without extra labor.
Technical Parameters
| Model | Capacity (t/h) | Power (kW) | Dimension (L×W×H mm) |
|---|---|---|---|
| MDJY50×1 | 0.8~1.0 | 0.75 | 2770×720×900 |
| MDJY50×2 | 1.5~2.0 | 0.75×2 | 3080×720×1650 |
| MDJY50×3 | 2.0~2.5 | 0.75×3 | 3080×720×2450 |
| MDJY71×2 | 4.0~4.5 | 2.2 | 2770×720×1800 |
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