CNC Turntable Price Guide

• 1
  Key takeaways
• 2
  Buy a turntable, retrofit, or outsource
• 3
  What actually moves a CNC turntable price
• 4
  Costs that sit outside the machine quote
• 5
  Seven specs to request before you compare CNC turntable price
• 6
  When outsourcing beats buying a turntable
• 7
  How to source rotary work without overpaying

A CNC turntable price is not set by diameter alone. Two tables the same size can differ by a factor of four. The gap comes from what the table must hold under cutting load. A positioning-only table indexes to a point and locks. A simultaneous table drives the part while the tool is in the cut, so the worm gear, bearing preload, and encoder resolution all tighten.

Start with the load case. A 50 kg fixture on a Ø400 mm table at 200 mm from center produces a different torque demand than a 5 kg part at 80 mm. Ask the supplier for the allowable unbalance and the axial load rating. If those numbers are missing from the quote, the price is not comparable to anything.

Indexing accuracy and repeatability are two specs. Indexing accuracy is how close the table lands to the commanded angle. Repeatability is how close it returns to the same angle over many cycles. For most production work, repeatability matters more. A table rated ±15 arc-sec indexing and ±5 arc-sec repeatability behaves better than one rated ±10 arc-sec on paper with no repeatability figure.

Encoder type is the next split. A standard incremental encoder on the motor shaft is cheap and works for positioning. A direct-mounted rotary encoder on the table itself costs more but removes backlash and belt stretch from the reading. If your tolerance is tighter than ±0.01 mm on a 150 mm radius, budget for the direct encoder.

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  Torque at the partCalculate from part mass × distance from center, then add fixture weight.
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  Repeatability over accuracyProduction wins come from returning to the same angle, not from a single perfect index.
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  Encoder mountingDirect table-mounted encoders remove drivetrain error from the feedback loop.

The turntable invoice is the visible line. The rest shows up over the first year. Tooling for rotary work often needs extended reach holders, because the part swings in an arc and the tool must clear the table edge. Those holders cost more than standard ones and may need balancing for higher spindle speeds.

Fixtures are the second line. A trunnion fixture for a one-off job can cost as much as a month of machine time. If the part family changes often, a modular zero-point system pays back faster than a dedicated fixture. That decision belongs in the same spreadsheet as the table price.

Coolant and chip evacuation change too. Rotary work throws chips in a wider arc, so a machine with a weak conveyor will stall. Add the cost of a chip conveyor upgrade if the current one is sized for 3-axis work only.

Operator time is the quietest cost. A 5-axis setup with a rotary table takes longer to prove out than a 3-axis setup. The first article may need two or three proving cycles. If you are quoting a job, put an extra 4 to 8 hours of setup into the estimate. If you are buying a table, ask whether the supplier includes on-site alignment and a test cut.

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  Extended toolingLonger holders and balance grades add cost and lead time.
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  Fixture strategyDedicated fixtures are cheap per part and expensive per job change.
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  Chip handlingRotary cutting spreads chips wider; check conveyor capacity.
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  Proving timeBudget 4 to 8 setup hours for the first 5-axis rotary job.

A quote without spec numbers is a guess. Ask for the same seven values from every supplier, then put them side by side. The lowest price often loses on one of these, and that gap shows up as scrap later.

Start with table diameter and through-hole. The through-hole matters because it sets the largest bar or cable you can pass. A Ø400 mm table with a 60 mm through-hole cannot take a 80 mm shaft, no matter what the load rating says.

Next, ask for maximum speed in rpm and the allowable unbalance in N·mm. Speed and unbalance are linked. A table rated to 100 rpm with a balanced load may only be safe to 40 rpm with the fixture you have. Suppliers who cannot state unbalance are quoting a catalog number, not a machine.

Finally, ask for the clamping torque or brake holding force. Simultaneous cutting pushes against the table. If the brake is weak, the table creeps during a heavy cut and the surface finish suffers. The numbers should be in the quote, not in a follow-up email.

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  Table diameter and through-holeSets the largest part or bar that can pass through.
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  Indexing accuracy and repeatabilityTwo separate numbers; ask for both in arc-sec.
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  Maximum speed and unbalanceRated rpm must match your actual fixture balance.
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  Brake holding torqueWeak clamping shows up as chatter and finish drift.

Capital is not the only cost. A turntable needs floor space, power, coolant, and a trained operator. If your plant runs one shift and the rotary work is a small share of spindle time, the table sits idle most of the week while you still pay for it.

A machining partner spreads that cost across many jobs. At GreatLight we run 16 simultaneous 5-axis machining centers and 16 mill-turn centers, with a Ø400 mm rotary table in the mix. That capacity exists whether your job runs or not. You pay for the hours you use.

Outsourcing also brings the process knowledge. Rotary work fails on tool clearance, fixture stiffness, and chip evacuation more often than on the table itself. A partner who runs rotary jobs daily has already solved those problems. You get the first article faster.

The trade-off is control. If the part is a core product or the geometry is confidential, you may want it in-house. We sign NDAs on request and treat every upload as confidential. For most other cases, sending the rotary work out and keeping the simple 3-axis work in-house is the cheaper split.

If you do buy, remember the table is one line in a larger budget. If the number in this CNC turntable price guide looks high, check whether the alternative is a partner quote. The right answer depends on hours, not on pride.

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  Under 200 rotary hours a yearOutsourcing usually wins on total cost.
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  Over 1,500 rotary hours a yearIn-house capacity starts to pay back.
• 3
  Confidential geometryNDA and in-house control may justify the capital.