Dentsply Sirona · Dental Equipment · $30,000 – $55,000
Machines under 1,500 milling hours run $48,000–$55,000; anything over 2,500 hours and you're down to $32,000–$40,000 because spindle replacement is in your future. Ask for service history gap - if there's a 9+ month gap between calls, someone skipped PM and you're buying a problem.
Open the milling chamber and check the spindle nose for blue discoloration (heat stress = worn bearings coming). Run a test mill on their demo disc; listen for grinding noise during high-speed rotation. Pull the last 12 months of service tickets and verify spindle PM was done every 6 months, not skipped.
California and Texas DSOs are moving these units because insurance reimbursement for same-day crowns is still $950–$1,200 here; that ROI justifies the $2,500/year service cost. Pacific Dental Services has about 200 of these running across their network, so parts availability in the West is solid.
| Model | Brand | Used Price | Key Spec | Value Score |
|---|---|---|---|---|
| Cerec MC XL ✓ | Dentsply Sirona | $30,000–$55,000 | CAD/CAM milling unit, in-office restorations... | ●●●●● |
| ProMax 3D Plus | Planmeca | $40,000–$85,000 | CBCT 3D imaging, cephalometric, 23x26cm FOV... | ●●●●○ |
| OP 3D Pro | KaVo | $35,000–$70,000 | CBCT 3D, 16x13cm FOV, low dose... | ●●●●○ |
| Orthophos SL 3D | Dentsply Sirona | $38,000–$75,000 | CBCT panoramic ceph, 11x10cm FOV... | ●●●●○ |
Spindles hold up to 3,000–3,200 hours if PM is done every 6 months. If the previous owner skipped PM, you're at 2,400 hours max before bearing play gets bad enough that your margins open up. Aspen Dental tracks this religiously; they get 3,100+ hours out of spindles.
Spindle assembly is $1,400–$1,600. Labor to swap it out with a service tech is $800–$1,100. You're down 4–6 hours. Some shops try to rebuild spindles for $900 but that's a gamble; Dentsply's refurb spindles are $2,200–$2,900 and you get 90 days warranty.
Milling unit handles polymers, composites, and zirconia. Glass ceramics (like IPS Emax) will mill but you'll chew through burs faster and get microscratch issues. Most clinics stick to zirconia and composite; Emax gets sent to the lab because the material cost savings don't beat bur replacement.
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I save you 6–8 hours of downtime calls per year by pre-qualifying spindle condition and matching you with a unit that's had consistent PM - that's roughly $1,800–$2,400 in lost revenue you don't lose. I also know which refurb suppliers actually replace seals versus just cleaning, so you don't inherit someone else's spindle failure at month 4.