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Every cartoning machine on the market is sold on one number: its rated speed. A supplier quotes 120 cartons per minute, the brochure says "up to 7,200 cartons per hour," and the purchase order is signed. Then the machine lands on your floor and runs at 4,800. Nobody lied — but nobody did a proper cartoning machine speed calculation either.
Rated speed is a laboratory figure measured on a perfect carton, with a perfect product, at a fixed temperature. Real output is what your shift actually produces when the board is slightly warped, the changeover ran long, and the operator went to lunch. The gap between the two is usually 15–30%, and it is the single most expensive number in your packaging budget.
This guide shows you how to calculate both figures, how to model OEE for a cartoner before you buy, and which numbers to put in the purchase contract so the machine you receive matches the machine you paid for.
Machine builders publish speed in cartons per minute (cpm), boxes per minute, or units per hour. That figure comes from a factory acceptance test run under ideal conditions: one SKU, one carton size, fresh board from a single pallet, no upstream starvation, and continuous operator attention.
As we explain in our complete guide to automatic cartoning systems, a cartoner is only one link in a chain. The moment you connect it to a real filling machine, a real leaflet folder, and a real case packer, the chain's rhythm — not the cartoner's motor — sets the pace. A 120 cpm cartoner fed by a filler that delivers 90 products per minute will output 90 cartons per minute forever, no matter what the nameplate says.
So the first rule of cartoning machine speed calculation is this: your machine's real speed is the lower of (a) its mechanical capability and (b) the slowest upstream or downstream unit in the line.
The published maximum, in cartons per minute. Treat it as a ceiling, never a plan. For reference, mainstream automatic cartoners run 60–120 cpm, high-speed servo models reach 150–260 cpm, and vertical cartoners for bottles and small parts typically sit at 40–100 cpm.
The time between two finished cartons leaving the discharge conveyor, measured with a stopwatch — not read from the HMI. Effective cycle time = 3,600 ÷ actual cartons per hour. If the machine produces 4,800 cartons in an hour, your effective cycle time is 0.75 seconds, even if the rated cycle time is 0.5 seconds.
Total shift minutes minus planned breaks, planned cleaning, and planned maintenance. An 8-hour shift with a 30-minute planned stop gives 450 minutes of planned production time. Do not include unplanned stoppages here — those belong in the availability loss.
Here is the calculation most buyers never run. Take a high-speed automatic cartoner rated at 120 cartons per minute, running one 8-hour shift.
That is a well-run machine. A 73–80% OEE cartoner is healthy; a 60% OEE cartoner is quietly costing you a second shift's worth of labour every week. If you are still comparing suppliers, this same calculation is the fastest way to compare two quotes that look identical on paper — see our automatic cartoner cost breakdown for how speed assumptions change total cost of ownership.
Use this table as a sanity check when a supplier quotes a speed. The "typical real output" column reflects what these machine classes actually deliver over a full shift, after changeover, minor stops, and rejects.
| Machine class | Rated speed | Typical real output | Real vs. rated | Best fit |
|---|---|---|---|---|
| Semi-automatic cartoner | 30–60 cpm | 1,300–2,600 cartons/h | 72–82% | Low volume, many SKUs, manual loading |
| Standard automatic cartoner (120/150 class) | 60–120 cpm | 3,000–5,800 cartons/h | 78–88% | Mid-volume food, cosmetics, hardware |
| High-speed servo cartoner (150H / 200GS-H class) | 150–260 cpm | 6,500–12,000 cartons/h | 80–90% | Single-SKU, 2–3 shift operation |
| Vertical cartoner (VC160 / VC260 class) | 40–100 cpm | 1,900–4,800 cartons/h | 75–85% | Bottles, tubes, lids, small rigid items |
| Blister–cartoner linked line | 80–200 blisters/min | 4,000–8,500 cartons/h | 70–85% | Pharma, regulated serialisation |
Notice that the efficiency percentage rises with machine class: high-speed lines are usually dedicated to one product, while semi-automatic machines spend proportionally more time on changeover and manual feeding. This is why "buy the fastest machine" is bad advice for a factory with 40 SKUs — the horizontal vs vertical cartoning machine comparison shows how product geometry constrains speed far more than motor size does.
OEE is only useful if you know where the missing time went. On a cartoner, losses almost always fall into six buckets:
Minor stops and reduced speed are the two losses most factories never measure, and together they usually account for a third of the gap between rated and real output. Our cartoning machine troubleshooting guide covers the mechanical causes behind both, and the cartoning machine maintenance checklist shows how daily and weekly tasks keep availability above 90%.
If your line runs more than one carton size, changeover time belongs in the speed calculation — not in a separate conversation. A machine that runs 120 cpm but needs 90 minutes to change format produces less per week than a 90 cpm machine that changes over in 20 minutes.
Calculate weekly good output instead of hourly output:
Weekly output = (Available hours − changeover hours) × real hourly rate
Five changeovers per week at 90 minutes costs 7.5 hours. On a 5-day, 2-shift schedule that is roughly 9% of your entire production calendar — enough to erase the advantage of a faster machine. When you specify a cartoner, ask for a documented changeover time with a written step list, and ask whether format parts are tool-free. That single question often separates a machine designed for contract packers from one designed for a single-product factory.
Two physical limits cap every cartoner, and neither appears in the brochure:
Product characteristics matter just as much: a cartoner that handles 250 cpm of stable blister cards will not handle 250 cpm of loose tea bags without a dedicated feeding system.
This is where the calculation pays for itself. Instead of accepting "rated speed: 150 cpm," write the acceptance criteria like this:
A supplier who can meet those clauses will meet them in your factory. A supplier who resists them is telling you something useful about the nameplate number.
Once you have calculated real output, the machine choice usually makes itself. For mid-volume food, cosmetic, and hardware lines running 3,000–6,000 cartons per hour across several SKUs, a standard servo-driven automatic cartoner is the economically correct answer — our guide to selecting the right automatic cartoner walks through the selection matrix in detail.
For single-product operations that need to compress labour cost per carton, high-speed models are the right tool: the MTK-150H high-speed automatic cartoning machine and the MTK-200GS-H are built for continuous multi-shift runs where every point of OEE converts directly into margin. The key is to buy that speed only when your forecast volume can keep the machine fed for at least two shifts a day — otherwise the extra capacity becomes idle capital.
Divide the number of good cartons produced by the number of minutes the machine was actually running. If a machine produced 4,200 good cartons during 350 minutes of run time, its real speed is 12 cpm — not the 120 cpm on the nameplate. Always measure over at least one full shift, and use good cartons rather than total cartons.
A well-run automatic cartoner should reach 75–85% OEE on a dedicated product. Above 85% is excellent and usually means a single SKU with stable board supply. Below 65% almost always points to changeover time, chronic minor stops, or an upstream feeding mismatch rather than a machine fault.
The four most common causes are: upstream starvation (the filler cannot keep up), carton board quality or grain direction causing flap spring-back, worn vacuum suction cups or glue nozzles reducing reliability at speed, and operators deliberately de-rating the machine to avoid jams. Measure availability and performance separately — the answer is in which one is low.
No. Cost per carton falls with speed only while the machine is fed. If a 200 cpm machine runs at 40% utilisation, its depreciation, maintenance, and floor space are spread over fewer cartons than a 100 cpm machine running at 85%. Calculate cost per 1,000 good cartons at your forecast volume, not at rated capacity.
Send us your carton dimensions, board grade, product type, and target output per shift — our engineers will return a realistic speed estimate, a recommended machine class, and the OEE assumptions behind both. No nameplate numbers, no optimistic brochure figures.
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