A Swiss-type lathe quotes nothing like a chucker, even when the part is identical. The machine runs slender parts from bar, holds them right at the cutting zone with a guide bushing, and finishes most of the geometry in a single unattended pass — which is why swiss machining cost lives or dies on volume rather than on the per-part feel that works for one-off prototypes. Price a 5-piece run and a 50,000-piece run with the same logic and you will overquote the small job and lose the big one.

This article builds a Swiss-turned unit price from the cost drivers that are specific to sliding-headstock machines: the high but heavily amortized machine rate, the precision-ground bar the guide bushing demands, the overlapped tooling that collapses operations into one cycle, and the break-even volume where Swiss beats a fixed-headstock chucker. It assumes you already know how to build a turned part bottom-up — if not, start with the CNC turning and lathe quoting guide and come back for the Swiss-specific layer.

Why Swiss machining is its own cost model

A fixed-headstock lathe clamps the bar and the tool reaches in; on long, thin parts the workpiece deflects and the cycle slows down. A Swiss machine slides the bar forward through a guide bushing so the tool always cuts within a few millimetres of the support. That single difference cascades into the cost model in three ways.

First, slenderness stops being expensive. A 4 mm-diameter pin 40 mm long — a nightmare of chatter on a chucker — runs fast and accurate on a Swiss because it is never unsupported. Second, the machine carries many tools on gang slides and a sub-spindle, so it overlaps operations and works both ends of the part without a second handling step. Third, it is built to run lights-out from a bar feeder, so once it is set up the operator walks away and the per-part labour content drops toward zero. The hourly rate is high; the labour per piece is not.

The machine rate: high per hour, low per part

The instinct that kills Swiss quotes is reading the headline shop rate — say €90–120/h fully burdened — and multiplying it by a cycle time as if an operator stood there the whole time. On a manned chucker that is roughly true. On a lights-out Swiss it is not: one operator tends three or four machines, so the labour slice of the rate is divided across the spindles it actually supervises.

Build the rate the way you would for any machine (the machine shop hourly rate calculation walks through it), then split it into a machine component and a labour component, and apply only the supervised share of labour to an unattended run:

Effective rate (lights-out) = machine cost/h + (operator cost/h ÷ machines tended)

A €110/h burdened rate that is €70 machine and €40 labour, with one operator on four Swiss machines, runs at €70 + €10 = €80/h effective through the unattended hours. That €30/h gap, multiplied across a long run, is the difference between winning the contract and pricing yourself out of it.

Material: the guide bushing changes what you buy

Swiss material cost starts the same as any turned part — bar diameter, length per part, cutoff, remnant — but the guide bushing adds a constraint that hits the price. The bushing grips the bar on its outside diameter as it slides, so the bar has to be straight, round, and held to a tight diameter tolerance. That usually means precision-ground or centreless-ground bar, not as-drawn stock, and ground bar carries a real premium.

Bar type	Typical use	Cost vs as-drawn
As-drawn / cold-drawn	Chucker, loose tol	baseline
Precision-ground	Swiss guide bushing	+15% to +40%
Bar straightness	Long lights-out runs	reject/scrap risk if poor

The lesson for the estimate: do not copy the material line from a chucker quote. A Swiss job on the same alloy and diameter can cost noticeably more in raw bar because the process demands a better-prepared bar — and a bar that is out of tolerance or bowed will jam the bushing and scrap the run, a risk worth a small allowance on long, unattended jobs.

Cycle time: overlapped tooling, not a sum of passes

On a chucker you add up the passes in sequence. On a Swiss you cannot, because gang and back-working tools cut simultaneously — the machine might be turning an OD on the main spindle while the sub-spindle drills the back of the previous feature. The cycle is the length of the longest parallel path, not the sum of every operation.

Estimating that without the machine in front of you is hard, so quote it in tiers:

1. Dominant operation — usually the longest turning or threading pass; this sets the floor.
2. Overlapped operations — drilling, grooving, back-working that run in parallel and add little or nothing to the floor.
3. Non-overlapped additions — anything that must wait its turn (a slow form tool, a deep bore) adds its full time.
4. Bar feed and part-off — small and fixed per part, but real across high volume.

The practical effect is that a Swiss part with eight features can have a shorter cycle than a chucker part with four, because most of the eight happen in parallel. Quote the Swiss cycle from the dominant path and you will be far closer than summing operations like a milling job.

The break-even: when Swiss beats a chucker

Swiss setup is longer and fiddlier — gang tools, guide bushing fit, bar feeder, first-article — so the setup cost per part is brutal at low volume and trivial at high volume. The chucker sets up faster but carries more labour per cycle. Plot both and they cross. Below the crossover, quote the chucker; above it, the Swiss wins and you should price it as such.

Quantity	Chucker (€/part)	Swiss (€/part)	Cheaper
25	€4.10	€9.80	Chucker
250	€2.30	€2.60	Chucker
1,000	€1.95	€1.45	Swiss
10,000	€1.85	€1.05	Swiss

(Illustrative: Swiss setup €450 vs chucker €160; Swiss effective rate €80/h with near-zero per-part labour vs chucker €95/h manned.) The exact crossover depends on your rates and the part, but the shape is always the same — Swiss is a volume play. Knowing where your own crossover sits turns "we don't really do Swiss work" into a defensible quote on the jobs where it actually wins.

A worked example: a brass connector pin, batch of 5,000

Take a 6 mm free-cutting brass pin, 28 mm long, with a turned shoulder, a cross-hole drilled with live tooling, a short thread, and a chamfer each end. Quantity 5,000, run lights-out from a bar feeder.

1. Material — 6 mm precision-ground brass bar. Length per part = 28 + 2 (cutoff) + 1 (face) + 1 (remnant share) = 32 mm. At €0.95/m for ground brass that is €0.030.
2. Cycle — dominant path ≈ 0.32 min (cross-hole and back chamfer overlap the OD turning). At €80/h effective lights-out rate = €0.43.
3. Setup — €450 ÷ 5,000 = €0.09.
4. Secondary — the cross-hole and thread run on the machine via live tooling, so secondary is just barrel deburr + sample inspection ≈ €0.04.
5. Cost per part = 0.030 + 0.43 + 0.09 + 0.04 = €0.59.
6. Price at 35% margin — using price = cost ÷ (1 − margin), 0.59 ÷ 0.65 = €0.91.

Run the same part on a manned chucker and the cross-hole becomes a separate op, the labour stays in every cycle, and the cost climbs past €1.40 before margin — the same part, a 50% cost swing, driven entirely by the process choice. The margin step uses the same arithmetic as any job; see margin versus markup pricing for why dividing by (1 − margin) is not the same as adding a markup.

Tolerance, finish, and the lights-out risk premium

Two adjustments finish the Swiss estimate. Tight tolerances and fine finishes cost the same way they do on any turned part — a finish pass at reduced feed, a gauged check, more scrap risk — and reading those callouts off the drawing correctly is the whole game. The new factor unique to lights-out running is unattended risk: a tool that wears, a bar that bows, or a chip nest that builds up over an eight-hour unmanned run can scrap dozens of parts before anyone notices. On long Swiss jobs, carry a small scrap and tool-wear allowance in cost rather than discovering it in your margin — the same discipline that keeps any high-volume quote honest, covered in how to price CNC machined parts.

From a drawing to a Swiss-turned price

The slow, error-prone step in swiss machining cost estimation is not the arithmetic — it is reading a small, dense turned-part drawing completely and then choosing the right process model for the quantity. Bar diameter and grade, every diameter transition and thread, the tolerance and finish callouts, the features that live tooling can absorb into one cycle: miss any of them and the unit price is wrong before you apply a margin, and at 5,000 pieces a wrong unit price is a wrong contract.

QuoteBuddy reads the technical drawing and surfaces those features — material and stock callout, turned diameters, threads, cross-features, and tolerance classes — so the estimator builds the price from a complete picture instead of a hurried scan, using the same AI drawing interpretation on every part. The cost engine then assembles material, cycle, setup, secondary operations, and your target margin the same way every time, on every part — so the volume break-even is a number you can see, not a feeling.

Start a 30-day trial and run a few real Swiss-part drawings through it — from upload to a complete, itemized quote PDF — and see whether the unit price it builds matches what you would have quoted by hand, with the margin landing exactly where you set it.