Grading principle
Roller or belt graders sort by diameter through widening gaps. Cup graders weigh each fruit on a load cell. Camera graders add colour, shape and surface defects. Your buyer's specification decides which one.
No DramaBuyer guide · Agriculture & feed
A fruit grader must sort on the measure your buyers pay for, size, weight or appearance, and do it without bruising the fruit, and the cheapest machines fail on one of those two without saying so.

01
Roller or belt graders sort by diameter through widening gaps. Cup graders weigh each fruit on a load cell. Camera graders add colour, shape and surface defects. Your buyer's specification decides which one.
Every drop and transfer can bruise. Ask the height of each drop, the padding, and how fruit lands in the outlet bins.
Lanes set throughput and outlets set how many grades you can sell. Count both against your grade list.
Cups, rollers and camera programs may differ for each fruit. Ask what must be swapped and how long it takes.
02
Send these with the enquiry. Without them, any number a factory gives you is a guess dressed as a quotation.
03
| Require this | A pass looks like |
|---|---|
| Grade a counted lot of your fruit, then reweigh or remeasure a sample from each outlet by hand. | Fruit in the wrong grade counted per outlet and inside the agreed rate. |
| Hold graded fruit for two days and inspect for bruises. | Bruised fruit counted against an ungraded control box, within the agreed difference. |
| Run at the stated capacity for thirty minutes. | Tonnes per hour weighed at the grading accuracy tested above. |
04
05
A vegetable washing line first, with a roller grader built for rough product.
A grain colour sorter, built for small kernels in free fall.
06
We name the kind of source, how many and when, and never the factory. Listed prices are asking prices, not landed cost. Where we do not hold a fact we say so: that is a GAP, not an estimate.
07
Every machine we source in this area is on the Agriculture & feed page. How a project runs, stage by stage, is on how it works, and what it costs is on pricing.
Straight answers
On grading accuracy at speed, bruising and camera software. Test both on the same box of your fruit.
Serial against the declaration, a hand check of each outlet, a bruise check after storage, load cell calibration and guarding.
The machinery declaration, electrical references, and food-contact declarations for parts that touch fruit.
The business placing the grader on the EU market; it checks the documents and adds its name.
Contact
Send a machine, a quotation you want checked, or a question. We reply with what we would look at first.
Sent
A person reads every message. You will hear back within one working day.
Not sent
Please email info@nodramachina.com directly and we will pick it up from there.