Machine shops price parts by adding setup and programming time, machine cycle time at an hourly rate, material, outside processing, inspection, and packaging, then dividing the fixed costs across the order quantity. The two biggest levers are usually how long the part takes on the machine and how many parts share the setup.
Understanding how a CNC machining quote is built helps engineers design for lower cost and helps buyers compare quotes on equal terms. This page breaks down the cost drivers behind a machined part and explains what you can change to reduce price.
The basic pricing formula
Most machine shops build a quote from the same components, even if their estimating methods differ:
- Fixed costs per order: programming, fixture design, setup, and first-piece inspection.
- Variable costs per part: cycle time on each machine, material, tooling wear, in-process and final inspection.
- Pass-through costs: outside processing such as heat treat, plating, or passivation, plus freight to and from processors.
- Documentation: FAI, CMM reports, and cert packages when required.
Unit price is roughly the fixed costs divided by quantity, plus the variable cost per part, plus pass-through costs, plus margin.
Machining cost drivers
| Cost driver | What increases it | How to reduce it |
|---|---|---|
| Setup and programming | Many operations, complex fixturing, new part number | Order larger lots, reorder at the same revision |
| Cycle time | Deep pockets, hard alloys, fine finishes, tight tolerances | Add corner radii, relax non-critical tolerances |
| Material | Nickel alloys, titanium, large stock sizes, specialty sourcing | Use common grades and stock sizes where allowed |
| Number of setups | Features on many faces, re-clamping | Design features reachable from fewer orientations |
| Outside processing | Heat treat, plating, multiple finishes | Combine or remove finishing steps |
| Inspection | Tight tolerances, 100 percent inspection, FAI | Flag only true critical characteristics |
| Quantity | Small lots carry the full setup | Consolidate orders or use blanket releases |
How the machine affects price
Shop rates vary by machine. A multi-tasking lathe with live tooling and Y-axis may carry a higher hourly rate than a basic lathe, but if it finishes the part in one setup instead of two, the total cost is often lower. Horizontal machining centers with pallet changers reduce load time because the next part is fixtured while the current one is cutting. Swiss-type machines with bar feeders can run unattended on small parts, which lowers labor per part. The right machine choice is part of the estimate. See Wexmar's machine list.
How material affects price
Material affects cost twice: the purchase price of the stock and the speed at which it can be cut. Aluminum and brass machine quickly. Stainless steels cut slower and wear tools faster. High-nickel alloys such as Inconel and Hastelloy, and titanium, cut much slower and cost more per pound. DFARS-compliant specialty metal sourcing can also add cost. Our materials page lists the alloys we machine.
Why quotes from different shops differ
Two shops can quote the same drawing very differently because they plan different machines, different numbers of setups, or different inspection. Quotes also differ on what is included: certs, inspection reports, outside processing, and freight. Before comparing, confirm each quote covers the same scope.
Checklist to lower the price of a machined part
- Order the quantity you will use over a reasonable period, or use a blanket order.
- Apply tight tolerances only to functional features.
- Specify common material grades and stock sizes where the design allows.
- Add internal corner radii and avoid very deep narrow pockets.
- Limit thread depth and specify Class 2 threads unless Class 3 is needed.
- Review finishing steps and remove any that do not serve a function.
- List required documentation up front so it is priced once, correctly.
How Wexmar prices parts
Wexmar's instant estimate tool reads an uploaded PDF or STEP file and returns a preliminary price. A human estimator then reviews the drawing, confirms the machine plan, material, outside processing, and documentation, and issues the final quote. There is no minimum order, so single prototypes are quoted the same way as production quantities.
Getting a quote
For an accurate machining quote, send the drawing, model, quantity breaks, material, finish, and documentation requirements together. You can upload a drawing for an instant estimate or call (315) 400-2654 to review pricing with an estimator.