Pears come in all shapes—round, pear-shaped, and everything in between. Unlike apples, they don't roll straight. And that changes everything about how they should be graded.
Pears Are Not Round. Roller Graders Are Not the Answer.
Some pears are round like apples. Some are the classic pear shape—narrow at the stem, wide at the base. Others fall somewhere in between. Wild pears can be as small as 1–4 cm in diameter, while cultivated varieties can reach 8 cm in diameter and 18 cm in length.
Roller graders work well for fruits with consistent shapes—apples, potatoes, citrus. These fruits roll smoothly between rollers and fall through gaps that match their diameter.
Pears don't roll that way.
A pear that's wider at the base and narrower at the stem can wedge sideways into a gap that doesn't represent its true size. It tilts. It shifts. It gets stuck. The result? Inconsistent grades and bruised fruit.
For pear packers, the math is simple: roller graders cost you money in mis-grades and damaged fruit.
Weight Sorting: The Right Way to Grade Pears
Weight sorting changes the equation entirely.
Instead of measuring diameter—which is misleading for irregular shapes—it measures what buyers actually pay for: weight. A pear that's 180 grams is a 180-gram pear, whether it's round or pear-shaped. Shape doesn't matter.
And because weight sorting doesn't rely on rolling fruit through gaps, it handles pears gently. No wedging. No tilting. No jamming. Just a soft weighing cup, a precise measurement, and a gentle discharge.
What weight sorting delivers for pears:
What Matters for Pears | What Weight Sorting Provides |
|---|---|
Irregular shape doesn't affect accuracy | Measures by weight, not diameter—shape is irrelevant |
Delicate skin bruises easily | Soft weighing cups + low-drop discharge—no rolling, no friction |
Export markets demand uniform packs | ±2g accuracy—consistent weight, pack after pack |
Different pear varieties, different sizes | 20–500g range—covers all varieties |
The Fstsort Linear Weight Sorter: Built for Pears
The Fstsort linear weight sorter is engineered specifically for delicate, irregularly shaped fruits like pears. It handles each fruit individually—no rolling, no jamming, no guesswork.
Key capabilities:
Capability | What It Means for Your Pears |
|---|---|
±2g accuracy | Consistent grading—every pear goes to the right grade |
7–12 weight grades | Fine enough for export specifications |
20–500g range | Covers all pear varieties—from small wild pears to large cultivated ones |
Soft weighing cups | Gentle handling—no bruising, no internal damage |
Low-drop discharge | Minimizes impact—pears land softly at every exit |
PLC touch-screen control | Save profiles for different varieties—switch in seconds |
The result: pears that leave the line accurately graded, gently handled, and ready for premium markets.
Explore the full specifications on our automatic weight sorting machine page →
Shape Doesn't Matter. Weight Does.
Pears come in all shapes. But buyers don't pay by shape—they pay by weight. A grader that measures diameter will always struggle with pears. A grader that measures weight handles them perfectly.
The technology exists. The question is whether you're using the right one for your pears.