Labs rarely regret the machine they bought. They regret what happened in month seven, when a spindle failed and the part was on a boat.
The purchase decision gets almost all the attention — spec sheets, demos, trade-show comparisons, financing. The ownership decision gets almost none. Yet ownership is where the money actually is. A mill that costs $38,000 and sits idle for five weeks has cost you far more than one at $46,000 that never stops.
Buyers commonly start by comparing products. That is the third step, not the first.
The three numbers
| Number | How to establish it | Why it decides everything |
|---|---|---|
| Units per day, at peak | Your busiest week in the last 12 months — not your average week. | Capacity built on averages fails exactly when you can least afford it. The machine becomes the constraint during your best month. |
| Cost of one lost day | Daily revenue from the work this machine does, plus outsourcing cost to cover it. | Converts downtime from an abstraction into a dollar figure. The most useful number in the purchase, and almost nobody calculates it. |
| Realistic operator hours | Who runs it, how many hours a week, what happens when they are away. | A machine needing a technician you do not have runs at a fraction of rated capacity. |
A lab produces 14 crowns a day at $95 net. Its wet mill going down costs roughly $1,330 per day — before outsourcing markup, before rush fees, before the client who does not come back. Against that, a $6,000 price difference is worth about four and a half days of downtime. If one machine's parts ship the same week and the other's take eight weeks, the cheaper machine is not cheaper.
That warranty length equals protection. A two-year warranty requiring you to ship a 90 kg machine overseas at your own cost, with a six-week turnaround, is worth considerably less than a one-year warranty serviced domestically with parts on the shelf. Read what the warranty does, not how long it lasts.
What the guide covers
- The 5 specifications that decide the outcome, and the 6 that are marketing
- A blank three-year cost-of-ownership table — purchase price is one line of nine
- What actually fails in mills, scanners, printers, furnaces and micromotors
- 10 questions to ask any distributor before signing
The full guide, including the blank three-year cost-of-ownership table you can take to any vendor.
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The complete series — all 6 guides
- 1. Capital equipment — The three numbers before any purchase (you are here)
- 2. Milling units — Wet, dry or both
- 3. 3D printers — Why print speed is the wrong number
- 4. Intraoral scanners — Open STL or their portal
- 5. Sintering furnaces — The program, not the furnace
- 6. Choosing a distributor — Ten questions for any distributor
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