Meta description: Cycle time, not machine price, sets cost per pallet. How to calculate pallets per hour, test a real rate and size a wrapping line before you buy.
Table of Contents
- Why Throughput Decides Payback
- How Cycle Time Is Built
- The Throughput Formula Buyers Should Run
- Typical Rates by Wrapper Type
- What Changes the Rate in Real Operation
- Film Cost per Pallet at Volume
- Labor and Payback Math
- Capacity Planning Mistakes
- How to Verify Throughput Before You Buy
- Frequently Asked Questions
- Source Wrapping Machines from Pefilmpack
Why Throughput Decides Payback
Purchase price is a one-time number; throughput is a daily one. Two wrapping machines quoted within a few percent of each other can differ by a third in pallets per hour, and that gap moves labor hours and payback more than the invoice does.
Most buyers compare price, turntable diameter and pre-stretch ratio. Fewer calculate the real rate the line has to sustain at dispatch, which is why machines that looked adequate on paper become bottlenecks in the second peak season. This guide covers the arithmetic and the field checks that keep capacity planning honest.
How Cycle Time Is Built
Cycle time is the interval from the start of one pallet to the start of the next, not the time the film is moving. Five segments make it up.
- Load transfer in. Forklift or conveyor placing the pallet on the turntable or into the arm’s envelope.
- Wrap sequence. Rotation or arm travel covering base wraps, spiral body wraps and top wraps at the programmed overlap.
- Film cut and seal. Manual cutting on semi-automatic units, automatic cut-and-clamp on full-automatic models.
- Load transfer out. Removal to the dispatch lane, plus any accumulation waiting time the layout imposes.
- Handshake losses. Operator walking time, recipe changes between load sizes, and recovery from film breaks.
Segments one, three and four are frequently omitted from supplier figures, which is why quoted rates and observed rates diverge by 20–30 percent.
The Throughput Formula Buyers Should Run
Pallets per hour = 3,600 ÷ cycle time in seconds × utilization factor.
Worked example: a 45-second cycle at 85 percent utilization gives 3,600 ÷ 45 = 80, then 80 × 0.85 = 68 pallets per hour. Compare that figure with the peak hourly demand from your dispatch profile, not with average demand across the month.
Utilization of 80–85 percent is a realistic planning assumption for a single machine with one operator and conventional forklift feeding. Using 100 percent is the fastest way to under-size a line.
Typical Rates by Wrapper Type
| Wrapper type | Typical cycle | Typical output | Notes |
|---|---|---|---|
| Semi-automatic turntable | 90–150 s | 15–30 pallets/h | Operator attaches and cuts film |
| Automatic turntable | 60–110 s | 25–45 pallets/h | Needs steady forklift supply |
| Rotary arm | 45–80 s | 40–70 pallets/h | Better for heavy or unstable loads |
| Inline or ring wrapper | 30–60 s | 60–100 pallets/h | Requires conveyor and controls integration |
These are planning ranges under normal conditions; actual output depends on load height, wrap pattern, film gauge and layout. Requirements may vary by application, market and applicable standard. The structural differences behind these figures are set out in turntable vs rotary arm wrapping machines.
What Changes the Rate in Real Operation
- Wrap pattern. Each additional top or bottom wrap adds seconds per pallet. Moving from two base wraps to four on a 40-pallet-hour line costs roughly an hour of output per shift.
- Load height and stability. Tall, light loads need slower rotation or arm travel to avoid displacement, so tall-load throughput is always lower than the brochure figure.
- Film gauge and pre-stretch. Higher pre-stretch ratios reduce film consumption, but a film that is over-stretched at low temperature breaks more often, and every break costs a full recovery cycle. See pre-stretched film gauges and yield.
- Roll changes. A machine that stops for a film roll change every 200 pallets loses more time than one that runs 350 pallets per roll, even at the same cycle time.
- Conveyor and accumulation. A fast wrapper fed by a single forklift runs at the forklift’s rate, not the machine’s.
- Recipe changes. Frequent switching between two or three pallet sizes adds setup time unless the controller stores recipes and the operator uses them.
Film Cost per Pallet at Volume
Throughput and film consumption pull against each other. Fewer wraps save seconds but reduce containment force; a heavier gauge holds load with fewer turns but costs more per kilogram. The only figure that reconciles both is cost per wrapped pallet, calculated from film mass used, film price per kilogram and the number of pallets secured.
Run that calculation for each candidate film rather than comparing roll prices. The method is set out in how to calculate stretch film cost per pallet, and it is the number that should sit next to the throughput figure in any capital request.
Labor and Payback Math
Throughput becomes money only when it is converted into hours. Divide monthly pallet volume by the calculated rate, then compare the result with the hours the current method consumes. The gap is what a faster machine can justify, provided the freed hours are actually redeployed.
Illustrative case: 2,000 pallets per month. At 20 pallets per hour the line needs 100 machine hours; at 45 pallets per hour it needs about 44. The 56-hour monthly difference, multiplied by the loaded hourly cost of the crew assigned to wrapping, gives the labor value. Add film savings from a higher pre-stretch ratio, then compare the total against the price difference and the maintenance reserve. The operating differences between configurations are set out in semi-automatic vs automatic wrapping machines.
Two cautions apply. Labor is saved only if the operator is redeployed or released, not if the time is absorbed by idle waiting. And the faster machine has to be fed: if forklift supply caps the line at 35 pallets per hour, payback must be calculated at 35, not at the quoted rate.
Capacity Planning Mistakes
- Sizing on the brochure rate. Catalogue figures usually exclude load and unload time.
- Using average demand. Dispatch peaks, not monthly averages, decide whether the line copes.
- Assuming full utilization. Breaks, shift changes and film roll changes are real capacity losses.
- Buying more speed than the layout can feed. Without accumulation conveyor, a fast wrapper simply waits.
- Ignoring the load mix. A line specified for one pallet size slows sharply when three sizes share the shift.
- Forgetting floor space. Dispatch lanes, film storage and maintenance access are part of the capacity calculation.
- Overlooking changeover. Pallet size changes cost more time on machines without stored recipes.
How to Verify Throughput Before You Buy
- Test with your own load. Send or simulate the heaviest, tallest and least stable pallet in your range.
- Count over 30 minutes, not one cycle. A single cycle hides film breaks, cut failures and operator delays.
- Use production film. Trial film of a different gauge changes both cycle time and break frequency, so specify the film you intend to run. The automatic wrapping machine range is normally quoted against a stated film specification for this reason.
- Watch the cut and clamp. Automatic cut reliability is the most common source of hidden downtime.
- Time a recipe change. Ask the supplier to demonstrate a switch between two pallet sizes.
- Agree an acceptance criterion. Write the expected pallets per hour, load specification and film gauge into the purchase order so the figure can be tested at commissioning.
Frequently Asked Questions
How many pallets per hour can an automatic wrapper handle?
Commonly 25–60 pallets per hour, depending on turntable or arm design, load height and wrap pattern. Inline ring wrappers with conveyor feed can exceed that range. Treat supplier figures as cycle-time claims and verify them with your own load.
Does pre-stretch ratio affect cycle time?
Indirectly. Higher pre-stretch reduces film consumption but can slow the wrap sequence if the film feed limits rotation speed, and over-stretched film breaks more often. Each break costs a recovery cycle, which is where throughput is actually lost.
Is a rotary arm always faster than a turntable?
Not always. On stable, light loads a well-specified turntable can match an arm. The arm advantage appears with heavy, tall or unstable loads that must not rotate, and where conveyor integration allows continuous flow.
What utilization factor should I plan for?
80–85 percent for a single machine with one operator and conventional forklift feeding. Add a second machine or accumulation conveyor if peak demand sits within 10 percent of calculated capacity.
Can a semi-automatic machine keep up with 40 pallets an hour?
Rarely. Semi-automatic turntables typically deliver 15–30 pallets per hour because the operator attaches and cuts film on every pallet. At 40 pallets per hour, an automatic unit with cut-and-clamp is the practical choice.
What load data do I need before requesting a quote?
Pallet length, width and load height, maximum load weight, load stability, required wraps and overlap, film type and gauge, shift pattern, peak pallets per hour and available floor space. Suppliers can size a machine only against a stated rate and load mix.
Source Wrapping Machines from Pefilmpack
Weishan Litong Packing Material Co., Ltd. supplies automatic stretch wrapping machines alongside the film they run on, which means machine specification and film specification can be matched in one quotation. Turntable and rotary arm configurations are available with film pre-stretch, programmable wrap recipes and options for load-size variants. Because the same factory supplies PE stretch film, buyers can test machine and film together and fix one point of responsibility for breakage or containment problems. OEM branding and export packing are supported for distributors.
Send us: pallet dimensions and maximum weight, peak pallets per hour, wrap pattern and overlap, film gauge, power supply, floor space and destination port. Send your specifications to Pefilmpack.