CNC Machining Services
Send us the geometry, we send back the part. CNC machining is the workhorse of custom manufacturing: it holds the tightest tolerances of any process on this page, works in almost any metal or engineering plastic, and needs no tooling investment — which makes it the right choice for one-off replacement parts, functional prototypes and low-to-mid volume production alike.
We quote from a 3D model (STEP or IGES is ideal), a fully dimensioned 2D drawing, or both. If a feature is going to be expensive to machine — an unnecessarily tight tolerance, a deep pocket with a small corner radius, a thread that would be cheaper as an insert — we tell you before the job runs, not after the invoice.
When CNC machining is the right call
- An obsolete part with no supplier left. A discontinued shaft, bushing, gear blank, wear plate or manifold can be re-cut from the sample or the original print — see reverse engineering.
- Tolerances a fabricated part cannot hold. Bearing fits, seal bores, spline and keyway work, flatness and concentricity callouts.
- Low volume where tooling can never pay back. Under a few thousand pieces, machining usually beats moulding or stamping on total cost.
- Prototypes that must behave like the production part, in the production material, before you commit to tooling.
What to send
A 3D model plus a drawing showing critical dimensions, tolerances, thread callouts, surface finish and material. Tell us the quantity you want priced (and any quantity breaks worth seeing), the material and any acceptable substitutes, and whether you need mill certs or an inspection report. No model? Send photos of the sample against a ruler and we will work from that — email [email protected].
Upload your drawing — quote in 1 business day
CNC Machining — processes available
| Process | Where it fits |
|---|---|
| 3-axis CNC milling | Prismatic parts, plates, housings, manifolds, brackets and fixtures — the highest-value-per-dollar milling process. |
| 4 and 5-axis CNC milling | Contoured and multi-face geometry machined in fewer setups, which holds true position better and cuts cost on complex parts. |
| CNC turning and live tooling | Shafts, spindles, bushings, adapters, pins and threaded components, with milled flats, cross-holes and slots in one operation. |
| Swiss screw machining | Small-diameter, high-length-to-diameter, high-precision parts in volume — dowels, pins, fittings, fasteners and instrument components. |
| Wire and sinker EDM | Sharp internal corners, hardened tool steel, tight-profile punches and dies, and features no cutter can reach. |
| Surface and cylindrical grinding | Ground finishes and sub-thou size control on hardened components, seal journals and bearing seats. |
Materials
| Aluminum | 6061-T6, 6082, 7075-T6, 2024, 5052, MIC-6 cast plate |
|---|---|
| Steel | 1018, 1045, 4140/4142 pre-hard, 4340, A36, 12L14 free-machining |
| Stainless steel | 303, 304/304L, 316/316L, 17-4 PH, 410, 420, 440C, duplex 2205 |
| Tool steel | A2, D2, O1, S7, H13 — hardened and ground where required |
| Copper alloys | C110 copper, 360 brass, 932/SAE 660 bearing bronze, aluminum bronze |
| Exotic | Titanium Grade 2 and Grade 5 (Ti-6Al-4V), Inconel 625/718, Monel |
| Plastics | Delrin/acetal, nylon 6/6, UHMW, PTFE, PEEK, polycarbonate, acrylic, G-10/FR-4 |
Typical capabilities
| General tolerance | ISO 2768-m as standard; ±0.005 in (±0.13 mm) typical on machined features |
|---|---|
| Precision tolerance | To ±0.0005 in (±0.013 mm) where the drawing calls for it and the feature allows |
| Typical milled envelope | Up to roughly 47 × 24 × 24 in (1200 × 600 × 600 mm); larger by arrangement |
| Typical turned envelope | Up to roughly 12 in (300 mm) diameter × 60 in (1500 mm) length |
| Standard surface finish | As-machined, 125 µin Ra (3.2 µm); 32 µin (0.8 µm) or better on request |
| Quantities | One-off through production runs; price breaks quoted at the quantities you specify |
Components we already stock for this work
Ship the standard parts on the same order
Custom parts rarely go into service alone. These are real, currently listed catalog items from the component families that usually accompany this kind of work — quote them on the same request and they arrive together.
Power Transmission
Other processes we quote
CNC Machining — Frequently Asked Questions
How do I get a quote for cnc machining?
Upload your drawing or 3D model on this page — STEP, IGES, DWG, DXF, STL, SolidWorks, Inventor, Parasolid, PDF drawings, photos, or a ZIP of the whole package — with the quantity and material, or email the same files to [email protected]. We review the package and reply with pricing, lead time and any manufacturability notes within 1 business day. If you only have a physical sample, send photos with a few measured dimensions and we will work from that.
What file formats do you need for a CNC machining quote?
A 3D model in STEP (.step/.stp) or IGES is ideal because it carries the exact geometry with no interpretation. Native SolidWorks, Inventor and Parasolid files are fine too. Add a 2D drawing (PDF or DWG/DXF) for tolerances, threads, finish and material callouts — geometry alone does not tell us which dimensions are critical. A dimensioned sketch or a photo of the old part with measurements is enough to start.
Can you machine a replacement part if I only have the broken one?
Yes. Send the sample or clear photos with measured key dimensions and we produce a drawing for your approval before anything is cut, so you can confirm fits and tolerances first. Worn or broken features are reconstructed from the mating parts and the function. This is our reverse-engineering path and it is how most obsolete-part jobs start.
How tight a tolerance can you actually hold?
Standard machined work is quoted to ISO 2768-m, roughly ±0.005 in (±0.13 mm). Precision features go to ±0.0005 in (±0.013 mm), and ground features tighter again. Tolerance drives cost more than almost anything else on a drawing, so call out tight tolerances only where the part actually needs them — we will flag any that look accidental when we quote.
Who actually manufactures the parts?
KKM Solutions is a manufacturing sourcing partner, not an in-house plant. Your job is placed with a vetted contract manufacturer matched to the process, material, tolerance and volume — so a prototype, a 5-axis aerospace-grade part and a 10,000-piece production run each go to a shop that runs that work every day, instead of being forced onto whatever equipment one factory happens to own. KKM manages the order, the paperwork and the delivery, and you deal with one supplier throughout.
What happens to my drawings and design files?
Files you send are used only to quote and manufacture your parts, are shared only with the supplier quoting the job, and are never published, resold, or used to list a product in our catalog. If you need a signed non-disclosure agreement in place first, ask for one at [email protected] before sending anything.
Can KKM Solutions supply the standard components that go with a custom part?
Yes — that is the reason to buy custom parts here rather than from a pure manufacturing marketplace. The catalog already lists more than 300,000 bearings, seals, sensors, motors, drives, pneumatic and power-transmission components, so a machined shaft can ship with its bearings and seals, and a fabricated frame with its guarding hardware, on one order and one invoice.
Need cnc machining?
Upload the drawing and we will come back with price, lead time and any design notes within 1 business day.
KKM Solutions manufactures through a vetted network of contract machine shops, fabricators, moulders and finishers rather than an in-house plant. Process capabilities, tolerances and lead times shown on this page are typical for the processes described and are confirmed against your drawing on the written quote, which is the governing document for every order.