Cut and Sort Logs First, or the Downstream Line Wastes Hours: YuanChuang MJD5-25FX Cut-Off & Sorting Saw
Cut logs to length and sort by diameter before sawing. The YuanChuang MJD5-25FX cut-off and sorting saw handles 1-4 m logs, auto-sorts six diameter classes, and cuts spec changes on downstream multi-blade saws from 5-8 to 1-2 times per shift.
Cut Logs to Length First, or the Whole Downstream Line Suffers
In many sawmills the workflow looks like this: a truckload of logs gets unloaded — long and short, thick and thin — and goes straight into the multi-blade saw. The result: unstable output lengths, spacer rings reshuffled every few days, and one worker tied up sorting logs all day. After-sales visits by Fujian Yuanchuang Mechanical & Electrical keep showing the same pattern: when a multi-blade saw underperforms, the root cause is usually not the saw itself, but the cut-off and sorting step upstream.
Three Headaches Caused by Unsorted Logs
1. Unstable lengths. Logs that are not cut to a fixed length first go in mixed, so output lengths drift and downstream panel or pallet assembly never lines up.
2. Constant spec changes. Board thickness on a multi-blade saw is locked in by spacer rings. When log diameters are all mixed, spacers must be re-set and all three arbors re-assembled. Industry figures: about 15 minutes per thickness change, about 25 minutes per saw-plate group change. With unsorted logs, that can mean 5–8 spec changes per shift and 1.5–4 hours of cumulative downtime.
3. A wasted sorting worker. Mixed piles need someone to sort before feeding. In 2026, labor demand in wood processing is up 18.7% year on year and skilled workers are harder to find — that sorting position is pure loss.
The Structural Account: How Many Hours Are Lost
- Item — Unsorted logs — Cut-off + diameter sorting
- Spec changes per shift — 5–8 — 1–2
- Downtime from spec changes — 1.5–4 h — under 0.5 h
- Sorting worker — 1 full-time — 0 (machine auto-sorts)
- Downstream recovery rate — fluctuates — stable at 76%–80% on multi-blade saws
Downtime matters: with average equipment effectiveness in the industry around 66.8%, cutting spec-change downtime alone recovers two to three hours of productive sawing per shift — like getting half a machine for free.
YuanChuang MJD5-25FX: Cut-Off and Sorting in One Pass
The YuanChuang MJD5-25FX automatic cut-off and sorting saw combines both steps:
Cut-off: cutting length 1–4 m, log diameter 5–25 cm, saw blade OD 700 mm, spindle speed 1500 rpm;
Sorting: automatic sorting by diameter into six classes — 4–9 / 10–12 / 13–15 / 16–19 / 20–22 / 23–25 cm, with the class ranges customizable to the diameters you regularly cut;
Feeding: 0–6 m/min inverter-controlled feed, seven 7.5 kW main motors, 4.6 m worktable (customizable); power subject to actual configuration.
Once sorted, each diameter class goes into its own pile, so the downstream log multi-blade saw consumes one class at a time — for 25–39 cm logs, pair it with the MDY25-40 auto-centering log multi-blade saw. Spec changes drop from 5–8 to 1–2 per shift, and spacer re-setting time disappears with them.
What To Do Next
Look at your own log yard first: if one worker sorts logs full-time and your multi-blade saw stops several times a shift for spec changes, fix cut-off and sorting before replacing the saw. Pair the line with 80CrV2 alloy saw blades, re-sharpened in-house on the Changgong seven-axis servo tooth-grinding machine so every tooth keeps the same angle — that is what keeps the cut face stable.
Sort the logs clean and the machine runs smooth; leave the pile mixed and the whole line works for nothing.
Q: What is the difference between a plain cut-off saw and a cut-off sorting saw? Which one do I need?
A: A plain cut-off saw only cuts long logs into fixed lengths. The MJD5-25FX also sorts the cut pieces by diameter into separate piles automatically. If your multi-blade saw keeps struggling with mixed diameters, go straight to the sorting saw — no manual sorting needed afterwards.
Q: After sorting by diameter, does the multi-blade saw really need fewer spec changes?
A: Yes. Thickness on a multi-blade saw is set by spacers; mixed diameters force spacer re-setting and re-assembly of all three arbors. With same-diameter piles, the saw runs one class at a time and spec changes drop from 5–8 to 1–2 per shift.
Q: My volume is small — is an automatic sorting saw worth it?
A: Count how many labor-hours sorting takes now. If one person sorts and feeds full-time, that is the real loss the machine removes. Even at small volume, send us your logs for a test cut and judge by the result.
Send us your material and we will run a test cut — YuanChuang multi-blade saws and cut-off sorting saws, with a setup matched to your logs.
Cut and Sort Logs First, or the Downstream Line Wastes Hours: YuanChuang MJD5-25FX Cut-Off & Sorting Saw · All technical resources