The purchase price of a case former is 20-30% of what it actually costs you over five years. The rest is energy, air, consumables, labor, maintenance, downtime, and scrap. Buyers who negotiate only the machine price end up with the most expensive machine in the hall. This article is the TCO model we run with ZRAY customers before they sign – the same five-year numbers we use to justify the double-head frame on high-volume lines.

TCO is not a theory exercise. When a plant runs 1.5 million cases a year, a difference of $0.001 per case is $1,500 per year. A difference of $0.01 is $15,000. These are the numbers that decide between a compact single-head machine and a high-speed double-head frame.

The five cost blocks of a case former

Break the five-year cost into these blocks and you can compare any two machines fairly:

1. Capital and financing – machine price, customs, installation, and the financing rate.
2. Energy – electrical load and compressed air consumption.
3. Consumables – tape, hot melt, and lubricants.
4. Labor – operators and the people who would otherwise form cases by hand.
5. Downtime and scrap – lost production, rejected boxes, and maintenance labor.

The last block is the one most quotes ignore, and the one that swings the decision. A machine that jams once per shift at 25 CPM costs you 25 boxes plus 10-15 minutes of restart time – that is real money on any line that ships against a schedule.

The ZRAY reference parameters for your calculation

Use these values from our spec sheets. They are measured, not brochure-adjusted.

Worked example: 1.5 million cases per year

Let us build a real five-year TCO for a plant running 300,000 cases per month, 6 days a week, 20 hours a day, on a Single-Piece Case Erector at 20 CPM:

Capital block (5 years):

• Machine + freight + install + FAT travel: assume $52,000 all-in.
• Financing at 6% over 5 years: adds roughly $8,300 in interest.
• Subtotal: $60,300 over 5 years = $12,060 per year.

Energy block:

• Electrical: 2.5 kW average × 6,000 operating hours/year × $0.12/kWh = $1,800/year.
• Air: 250 L/min average. At 0.6 MPa, one compressor kW produces roughly 110-130 L/min. That is ~2.1 kW equivalent × 6,000 h × $0.12 = $1,512/year.
• Subtotal: $3,312/year.

Consumables:

• Tape: 1.1 m per case (top + bottom, 60 mm BOPP) × 300,000 cases = 330,000 m. At $0.02/m for quality 60 mm BOPP that is $6,600/year.
• Hot melt: 1.5 g per case × 300,000 = 450 kg/year. At $3.5/kg = $1,575/year.
• Lubricants and spares: $900/year.
• Subtotal: $9,075/year.

Labor:

• One monitor operator instead of four hand-formers. Compare against manual: four workers × $8/hour × 6,000 h = $192,000/year avoided. Machine staffing: 1 × $8 × 6,000 = $48,000. Labor saving: $144,000/year.

Downtime and scrap:

• Assume 98% uptime (2% = 120 hours/year). At 20 CPM, that is 144,000 cases of lost capacity; even a third of that recovered is meaningful. Scrap at 0.4%: 1,200 cases/year. At $0.20 material + labor value per case: $240/year direct, plus downtime value of recovered capacity.
• Subtotal (direct): $240/year.

Five-year total:

• Non-labor operating cost: $3,312 + $9,075 + $240 = $12,627/year.
• Capital amortized: $12,060/year.
• Total non-labor: $24,687/year = about $0.0082 per case.
• With labor savings counted, the machine is net positive from month one: $24,687 operating cost against $144,000 labor avoided.

The headline number for your CFO: running cost below $0.01 per case, and with labor savings the machine pays for itself inside the first year on volume. At higher speed on the double-head frame, the per-case energy and consumable cost drops further, which is why the TCO-per-case on a Double-Head High-Speed Case Former at 35+ CPM comes out below $0.004 per case on large lines.

The four mistakes that wreck TCO comparisons

1. Comparing price, not lifecycle cost. A machine $8,000 cheaper that uses $3,000 more energy and air per year loses by year three. Use the table above, not the quote.
2. Ignoring air consumption. Compressed air is the most expensive utility in most plants – it costs 8-10x electricity per unit of delivered power. Two machines with identical speed but different air consumption are different machines.
3. Counting labor wrong. On a line that already has four people hand-forming, the case former does not just save labor – it removes a recruiting and training problem. Count the full loaded rate, not bare wage.
4. Underestimating jamming cost. One jam per shift × 15 minutes = 375 minutes a month of lost line time. At 20 CPM that is 7,500 cases a month of capacity, whether or not you sell them.

How downtime and scrap scale with speed

The interesting part of TCO is that high speed does not multiply downtime – it divides per-case cost. A 25 CPM single head and a 40 CPM double head have similar jamming rates below 0.5%, so the faster machine spreads the same maintenance cost over more cases. That is the argument for the double head when volume justifies it, and the argument against it when you cannot run it full – an idled double head still uses air and electricity.

Run this rule: buy the double head when average throughput demand is above 60% of its rated speed. Below that, a single head at full utilization beats a double head at half utilization on TCO.

Maintenance cost per case

Plan maintenance as a fixed per-case budget, not a quarterly surprise:

Compare that to the $0.0082 per-case total above and you see why maintenance is the least of your TCO worries when the machine is reliable. The jamming rate is the real driver – keep it below 0.5% and maintenance stays in the budget lane.

Payment and financing terms that change the capital block

Capital cost enters the TCO through financing, so the terms matter:

• Standard ZRAY terms: 50% advance deposit + 40% after FAT acceptance + 10% warranty balance.
• L/C available for bulk orders – useful for plants that finance through bank instruments.
• FAT before shipment: you can run your own customer samples at our facility (or via remote video witness) before the machine ships. A machine accepted at FAT arrives producing – that is a month of running speed you do not spend commissioning on site.
• 45-day custom lead time for configured machines; the earlier the order, the earlier the machine makes money.

The TCO template you can run today

Fill these seven lines with your own numbers and compare two machines side by side:

1. Five-year capital (price + freight + install + financing).
2. Annual energy: electrical kW × hours × tariff.
3. Annual air: L/min → compressor kW equivalent × hours × tariff.
4. Annual tape and glue per case × annual cases.
5. Annual labor: operators × loaded rate × hours.
6. Annual downtime: jams per week × minutes × cases per minute.
7. Annual scrap: rate × cases × value per case.

Sum 2-7, add amortized line 1, divide by annual cases. That is your true cost per case. On ZRAY equipment the honest number lands between $0.004 and $0.01 per case, depending on speed and volume – and that is before the labor block, which is almost always the biggest single saving.

If your volumes exceed 500,000 cases per year, run the same template against our Double-Head High-Speed Case Former – the per-case energy and consumable numbers drop with speed. For one-shift plants or tight floor space, the Single-Piece Case Erector keeps the same reliability logic on a lower capital base.

What we will send you for your TCO review

Ask us for the full TCO spreadsheet – it is an Excel model with your annual volume, tariff, labor rate, and scrap value as inputs, and it outputs the five-year comparison. Include your production data and we will run it with you remotely, line by line, so the number you present to management is one we can defend together.

Ready to run your numbers? Email [email protected] or message WhatsApp +86 13681839278 – a sales engineer responds within 24 working hours with the TCO template and the reference figures above matched to your machine. You can also request it through our contact page. Send your monthly case volume, operating hours, electricity tariff, and labor rate, and we will return a completed five-year TCO model for your specific case former configuration.