5 Axis CNC Machining Services — Complex Parts in One Setup
Emitech provides 5 axis CNC machining services for parts that 3-axis machines cannot reach efficiently: impellers, turbine blades, aerospace brackets, medical components, and mold cores with deep cavities and compound angles. Our simultaneous 5-axis and 3+2 positional machining hold ±0.01 mm on critical features, cut setups from 5–7 down to 1–2, and shorten total lead time by 30–50% on complex geometry. As a manufacturer with a documented quality management system, we return DFM feedback and a firm quote within 24 hours.
What Is 5 Axis CNC Machining?
5 axis CNC machining is a milling process in which the cutting tool and workpiece move along five axes at once: the three linear axes (X, Y, Z) plus two rotary axes. Depending on the machine configuration, the rotary axes are A and B, B and C, or A and C. The two extra rotary axes let the tool approach the workpiece from virtually any direction in a single clamping, so features on five faces of a part can be machined without re-fixturing.
The three common machine configurations are:
| Configuration | Rotary axes | Best for |
|---|---|---|
| Trunnion (table-table) | A + C in the rotary table | Small-to-medium prismatic parts, mold cores, medical components |
| Swivel head (head-head) | B + C in the spindle head | Large, heavy workpieces that should not be tilted |
| Head-table combination | B in the head + C in the table | Mixed production, tall parts, and general job-shop work |
3+2 vs Simultaneous 5 Axis Machining
Not all 5 axis work is the same. In 3+2 machining (also called positional 5-axis), the two rotary axes lock the part or tool at a fixed angle, and cutting proceeds with ordinary 3-axis motion. In simultaneous 5 axis machining, all five axes move together during the cut, keeping the tool tangent to continuously changing surfaces.
| Aspect | 3+2 positional | Simultaneous 5-axis |
|---|---|---|
| Tool motion | Rotary axes locked during cutting | All 5 axes interpolated together |
| Best geometry | Angled holes, tilted faces, multi-face features | Sculpted surfaces, impellers, blades, deep cavities |
| Surface finish on contours | Good | Excellent — constant tool engagement angle |
| Cycle time | Faster programming, slightly longer cutting | Shorter cutting on complex surfaces |
| Programming effort | Moderate | High — full collision checking required |
We select the strategy per part: 3+2 is often the most economical way to reach angled features, while simultaneous 5-axis is reserved for continuously contoured surfaces.
3-Axis vs 5-Axis: When Do You Need 5 Axis Machining?
You need 5 axis machining when one or more of these triggers apply:
- Features on three or more faces — a 3-axis job would need separate setups and fixtures for each face.
- Compound angles or tilted features — holes or surfaces not perpendicular to the base plane.
- Deep cavities — 5-axis tilting allows short, rigid tools instead of long, deflecting ones.
- Sculpted or contoured surfaces — impellers, blisks, propellers, ergonomic housings.
- Tight positional tolerances across faces — one clamping preserves the datum chain instead of stacking setup errors.
- Undercuts — features hidden from a straight Z-axis approach.
If none of these apply, 3-axis CNC milling is usually the lower-cost choice — we will tell you honestly during DFM review.
Advantages of 5 Axis CNC Machining
- Fewer setups: 5–7 clampings collapse to 1–2, cutting handling time and operator error.
- Higher accuracy: features on all faces stay in one datum chain, so true position across faces holds ±0.01 mm instead of accumulating re-fixturing error.
- Better surface finish: shorter tools vibrate less, and tangential tool orientation avoids the scalloping of ball-nose-only 3-axis finishing.
- Complex geometry in one operation: shapes that are impossible or uneconomical on 3-axis become routine.
- Shorter lead time: total cycle and queue time on complex parts typically drops 30–50%.
- Lower fixture cost: fewer dedicated fixtures and soft jaws to design and build.
Best-Fit Parts and Materials for 5 Axis Machining
Typical parts: impellers and blisks, turbine blades, aerospace structural brackets, orthopedic and dental components, mold and die cores, optical housings, robotic joints, and custom CNC machining parts with compound-angle features.
Materials we machine regularly:
- Aluminum 6061, 7075, 5083 — see our CNC aluminum parts capability
- Stainless steel 303, 304, 316L, 17-4 PH
- Titanium Ti-6Al-4V (Grade 5) for aerospace and medical
- Superalloys Inconel 718/625 for high-temperature service
- Copper alloys brass C360, bronze, beryllium copper
- Engineering plastics PEEK, Delrin (POM), Ultem, nylon
5 Axis Machining Accuracy and Quality Control at Emitech
Complex geometry only helps if it is measurable. Our 5-axis workflow includes on-machine probing for in-process verification, CMM inspection of critical features with full dimensional reports, and first-article dimensional inspection on request. Standard tolerance is ISO 2768-m; critical features hold ±0.01 mm, and tighter CNC tolerances are reviewed case by case. Every job ships with material certificates traceable to the mill and lot-level traceability.
How Much Does 5 Axis CNC Machining Cost?
5-axis machine-hour rates run higher than 3-axis, but the total part cost on complex geometry is often lower: one setup replaces five, dedicated fixtures disappear, and scrap risk drops. The main cost drivers are part complexity and programming time, material, tolerance grade, surface finish, and order volume. For simple brackets, 3-axis is cheaper; for a contoured impeller, 5-axis wins on both price and lead time. Send your model — our quote itemizes the machining strategy so you can see where the cost sits. Prototypes and low volumes are welcome through our CNC prototyping service.
From CAD to Finished Part: Our 5 Axis Process
- Upload your CAD — STEP or IGES plus a PDF drawing with critical tolerances.
- DFM review within 24 hours — we flag unreachable features, thin walls, and tolerance risks, and confirm the machining strategy (3+2 vs simultaneous).
- CAM programming — 5-axis toolpaths with full machine-simulation collision checking.
- Machining — single-clamping production with on-machine probing.
- Inspection — CMM verification of critical features; first-article dimensional inspection reports on request.
- Finishing and delivery — anodizing, passivation, plating or polishing, then global shipping.
Frequently Asked Questions
What is 5 axis CNC machining?
5 axis CNC machining is a milling process where the tool and workpiece move along three linear axes (X, Y, Z) plus two rotary axes at the same time. The rotary axes let the cutter reach five faces of a part in one clamping, which is what makes complex, multi-angle geometry practical. It is a core part of our CNC machining services.
How does 5 axis CNC machining work?
The machine's two rotary axes — in the table, the spindle head, or one of each — tilt and rotate the tool relative to the workpiece while the linear axes feed the cut. CAM software calculates collision-free 5-axis toolpaths, and the controller interpolates all five axes simultaneously so the tool stays tangent to the surface being cut.
What is the difference between 3-axis and 5-axis machining?
3-axis machining moves only in X, Y, and Z, so the tool always points straight down; multi-face parts need multiple setups. 5-axis adds two rotary axes, reaching angled and contoured features in a single setup. The result is better accuracy across faces, shorter tools, and 30–50% shorter lead times on complex parts — at a higher machine-hour rate. Simpler parts are still cheaper on 3-axis CNC milling.
What is 3+2 machining?
3+2 machining (positional 5-axis) locks the two rotary axes at a fixed angle, then cuts with ordinary 3-axis motion. It reaches tilted faces and angled holes without full simultaneous interpolation, programs faster, and is the economical choice for prismatic parts with angled features. Simultaneous 5-axis is reserved for continuously sculpted surfaces.
What are the advantages of 5 axis machining?
Fewer setups (typically 1–2 instead of 5–7), higher accuracy because all features share one datum chain, better surface finish from short rigid tools, the ability to machine undercuts and deep cavities, and shorter overall lead time. Fixture cost and scrap rate both drop as well.
When do you need 5 axis machining?
When a part has features on three or more faces, compound angles, deep cavities, sculpted surfaces, undercuts, or tight true-position requirements across faces. Impellers, turbine blades, aerospace brackets, and mold cores are classic candidates — see typical CNC machining parts we produce.
How much does 5 axis CNC machining cost?
Machine-hour rates are higher than 3-axis, but total cost on complex parts is often lower because setups, fixtures, and scrap disappear. Cost drivers are geometry, material, tolerance, finish, and volume. Upload a model for an itemized quote — prototype quantities are fine, and we quote within 24 hours.
What materials can be 5-axis machined?
Virtually any machinable metal or engineering plastic: aluminum 6061/7075, stainless 304/316L/17-4 PH, titanium Ti-6Al-4V, Inconel, brass and bronze, plus PEEK, Delrin, and Ultem. Material choice affects achievable tolerance and surface finish, which we confirm during DFM review.
Request a 5 Axis CNC Machining Quote
Whether you need one prototype impeller or a recurring batch of aerospace brackets, Emitech delivers 5 axis CNC machining with documented quality control and one-business-day quoting. Upload your drawing or 3D model and receive a detailed quotation with DFM feedback.
Request a 5 Axis CNC Machining Quote
Simultaneous 5-axis & 3+2 machining to ±0.01 mm. Aluminum, stainless, titanium, Inconel & PEEK. Global delivery.
Upload Your Drawing →5-Axis Machining + MIM at Emitech
Emitech is also a metal injection molding manufacturer. For high-volume parts, we MIM the near-net shape and finish critical datums, threads, and sealing surfaces on our 5-axis machining centers — combining MIM's unit-cost advantage with machined-feature precision. Our CNC secondary operations page explains the hybrid route.
- Processes: simultaneous 5-axis, 3+2 positional, 3-axis milling, turning, grinding
- Materials: aluminum, stainless steel, titanium, Inconel, copper alloys, engineering plastics
- Applications: aerospace, medical, robotics, mold & die, and MIM secondary operations
Upload your design files and start production immediately.
Source Custom MIM Parts from Emitech
Nanjing Emitech delivers MIM from tooling through sintering and finishing, plus precision CNC machining for prototypes and secondary operations. Custom MIM parts · CNC machining services · MIM services · Request a quote