Three linear axes (X, Y, Z)
X and Y move the tool across the part and Z moves it up and down, exactly as on a 3-axis milling machine.
5-Axis CNC Machining Services for Complex Parts
Dayao machines complex metal and plastic parts on 5-axis machining centers in its own factory in Dongguan, China. Five faces and angled features are cut in one setup, held to ±0.01 mm as standard and ±0.005 mm on critical features, and checked on a CMM — from one prototype to production.
- 1 setupUp to five faces cut without re-clamping
- ±0.005 mmOn critical features; ±0.01 mm standard
- 1 pcNo minimum order for machined parts
One setup or five?Watch a block get machined on five faces
Unclamp · turn the part · re-clamp · find zero again
Face being machinedTop
A 0° · C 0°
Setups so far1
The part stays clamped; the table tilts (A) and turns (C).
What Is 5-Axis CNC Machining, and How Does the Machine Move?
5-axis CNC machining moves the cutting tool along three straight axes, X, Y and Z, while two rotary axes tilt and turn the part or the spindle. Under ISO 841, the rotary axes are named A, B and C, for rotation around X, Y and Z. The result is that one machine reaches five faces of a part, and angled features, without re-clamping it.
Two rotary axes (A/B and C)
One rotary axis tilts the part or the head (A or B) and the other turns it around the vertical (C), so any face can point at the tool.
| Machine layout | How it moves | Best for | Limit |
|---|---|---|---|
| Trunnion (table-table) | Both rotary axes are in the table: it tilts (A or B) and turns (C) while the spindle stays upright. | Small to mid-size parts, deep undercuts, heavy cutting with a rigid spindle | Part size is limited by the space between the trunnion supports |
| Swivel head (head-head) | The spindle head tilts and rotates while the table stays still, so the part never moves. | Large and heavy parts, long parts, molds | Some travel is used up by the tilting head; less reach under overhangs |
| Head-table | The head tilts on one axis and the table turns on the other. | Mid-size parts, multi-vise and plate work | A middle ground between the two |
Source: ISO 841:2001 (axis nomenclature); Hurco, “5-axis CNC machine configurations: the pros and cons” (machine layouts); Dayao factory data (2026).
Do You Need 5-Axis, or Will 3-Axis With Fixtures Do?
You need 5-axis when a part has features on three or more faces that must line up, holes or faces at compound angles, undercuts or deep pockets that need a short tool, or curved surfaces the tool must follow. If the features sit on one or two faces, 3-axis milling is cheaper. A Dayao engineer makes this call from your drawing before quoting, and suggests the cheaper route when it works.
Features on three or more faces
If holes, pockets or threads sit on three or more sides and must line up with each other, one 5-axis setup avoids re-clamping between faces.
Compound angles
A hole or face tilted in two directions at once is reached directly on 5-axis; on 3-axis it needs an angled fixture made for that one part.
Undercuts and deep pockets
Tilting the part lets a shorter tool reach under a lip or into a deep pocket, which cuts with less chatter than a long tool.
Curved, sculpted surfaces
Impeller blades, ergonomic grips and blended surfaces need the tool to follow the surface continuously — that is simultaneous 5-axis work.
Tight position tolerance between faces
When a feature on one face is toleranced to a datum on another face, keeping both in one clamping removes re-clamping error.
When 3-axis is the better buy
A flat plate or block with features on one or two faces is cheaper on 3-axis; 5-axis machine time costs more per hour.
Does my part need 5-axis?Answer three questions
How many faces have holes, pockets or threads?
Are any holes or faces at a compound angle, or under an overhang?
Must features on different faces line up tightly?
Suggested route3-axis milling
- Setups on 3-axis2
- Setups on 5-axis1
Source: common machining practice for choosing 3-axis, 3+2 and 5-axis routes; Dayao engineering review practice (2026). The tool above is a guide, not a quote.
3+2 vs Simultaneous 5-Axis: Which One Does Your Part Need?
Most 5-axis work is 3+2, also called positional 5-axis: the rotary axes turn the part to an angle and lock, then a normal 3-axis toolpath cuts that face. Simultaneous 5-axis moves all five axes together while cutting, which only sculpted surfaces such as impeller blades and blended grips really need. Both make the part in one setup; 3+2 is faster to program and costs less.
| Point of comparison | 3+2 (positional) 5-axis | Simultaneous 5-axis |
|---|---|---|
| How the axes move | Rotary axes turn the part to an angle, lock, then a 3-axis toolpath runs | All five axes move at the same time while cutting |
| Typical parts | Housings, manifolds and brackets with features on several flat faces | Impellers, blades, turbine-style and sculpted surfaces |
| Programming | Simpler: each face is a normal 3-axis program at a new angle | Harder: tool orientation changes continuously; needs collision checking |
| Surface on curved faces | Curved faces are stepped with many small passes | The tool follows the curve, so blended surfaces finish smoother |
| Cost | Lower machine-time and programming cost | Higher; worth it only when the geometry needs continuous motion |
| Setups | One setup for up to five faces | One setup for up to five faces |
Source: ISO 841:2001; ISO 10791-6:2014 (5-axis interpolation tests); common CAM programming practice.
Why Does One Setup Make Features on Different Faces More Accurate?
Every time a part is unclamped, turned and clamped again, the machine must find its zero point again, and a small error is added between the features cut before and after. With five faces on 3-axis, that can mean four re-clamps. A 5-axis machine cuts all five faces from one clamping, so position tolerances between faces depend only on the machine, not on re-clamping.
One datum for every face
Features on all five faces are cut from the same zero point, so hole-to-hole positions across faces match the model.
No special angle fixtures
Angled holes are cut by tilting the table, not by building a one-off angled fixture for each face.
Checked on the CMM
Dayao measures positions between faces on the coordinate measuring machine, from the datums on your drawing.
Tolerances by process — turning, milling, 5-axis and sheet metal — are compared on the precision CNC machining section of the services page.
Source: ISO 1101:2017 (position tolerance and datums); Dayao factory data (2026) for tolerances and CMM inspection.
Which Parts Are Usually Machined on 5-Axis?
Parts are usually machined on 5-axis when their shape, not their size, makes 3-axis awkward: housings with ports on several faces, manifolds with cross-drilled holes, brackets with compound angles, impellers and blades, and sculpted consumer parts. Small precision parts with features on five sides also go to 5-axis, because one setup is faster than five.
Housings with angled ports
Valve and sensor housings often have ports on several faces at odd angles; 5-axis cuts them all from one clamping, so the ports line up.
Manifolds and blocks
Hydraulic and pneumatic manifolds have cross-drilled holes from many sides that must meet inside the block at the right point.
Brackets with compound angles
Mounting brackets for robots, cameras and fixtures often need faces tilted in two directions, which 5-axis reaches directly.
Impellers and blades
Fan and pump impellers have twisted blades that only a continuously moving tool can follow; this is simultaneous 5-axis work.
Ergonomic and sculpted parts
Handles, grips and consumer-product shells with blended surfaces are finished smoothly by tilting the tool with the surface.
Precision parts in one setup
Small precision parts with features on five sides are made complete in one setup instead of four or five clamping steps.
Source: common 5-axis application practice; Dayao factory data (2026).
How Do You Design a Part for 5-Axis Machining?
Design a 5-axis part so the machine can hold it from one face and reach every feature with a straight tool: leave stock or a flat for clamping, check line of sight to deep holes, dimension from one datum face, and send a STEP model. Mark only the surfaces that need a continuous fine finish, and do not ask for 5-axis where a 3-axis route works.
Leave a way to hold the part
A 5-axis part is gripped from one face, often on extra stock or a dovetail that is cut off later. Allow material or a flat for it.
Check that a tool can reach every feature
A tilted tool still needs a straight line of sight to the feature. Very deep, narrow holes may need EDM or a second operation.
Put datums on one face if you can
Dimensioning from one datum face lets every feature be measured from the same reference used in the setup.
Send a 3D model
A STEP file is essential for 5-axis work: the toolpaths are programmed directly from the model, with a 2D drawing for tolerances.
Say which surfaces need a fine finish
Mark only the surfaces that need a smooth, continuous finish. Other faces can be cut faster with positional 3+2 moves.
Do not ask for 5-axis where 3-axis works
Features on one or two faces cost less on a 3-axis machine; the engineer will suggest the cheaper route when the drawing allows it.
Source: common design-for-manufacturing practice for multi-axis milling; ISO 1101:2017 for datums; Dayao engineering practice (2026).
How Does Dayao Make and Check 5-Axis Parts?
At Dayao, a 5-axis part follows six steps: an engineer reviews the model and drawing, the fixture and toolpaths are planned and simulated for collisions, a sample is approved for new parts, the batch runs with in-process checks, every face is inspected against the same datums on the CMM, and the parts are packed and shipped. There is no minimum order for machined parts.
- 01
Model and drawing review
A Dayao engineer checks the STEP model and drawing, decides whether 5-axis is needed and flags features a tool cannot reach.
- 02
Fixture and program
The holding method and the 5-axis toolpaths are planned, with a simulation check for collisions before cutting.
- 03
Sample approval
For new parts, a sample is machined and measured, and you approve it before the batch starts.
- 04
Production with IPQC
In-process checks (IPQC) measure key features during the run to catch tool wear early.
- 05
CMM inspection (OQC)
Outgoing inspection checks features on every face against the same datums, using the CMM for critical positions.
- 06
Packing and shipping
Parts are protected and packed, then shipped on FOB, EXW, CIF or DDP terms.
5-axis machines in the factory: number, brand and travel are being confirmed 五轴台数 / 品牌 / 最大行程. See the machine list on the factory page.
CNC turningFor round parts: shafts, pins and bushings→CNC machining servicesCompare turning, milling, 5-axis and sheet metal→Materials guideAluminum, stainless, titanium and plastics compared→
Source: Dayao factory data (2026): 5-axis machining centers in-house, IQC / IPQC / OQC, CMM inspection, sample approval, Incoterms® 2020 shipping terms.
5-Axis CNC Machining FAQ: Accuracy, Cost and Files
Buyers most often ask what 5-axis machining is, how 3+2 differs from full 5-axis, whether it is more accurate or more expensive than 3-axis, and what to send for a quote. In short: 5-axis makes multi-face parts in one setup, 3+2 covers most of them, Dayao holds ±0.01 mm as standard, and a STEP model is needed to quote.
What is 5-axis CNC machining?
5-axis CNC machining moves a cutting tool along three straight axes (X, Y, Z) plus two rotary axes that tilt and turn the part or the tool. It lets one machine reach five faces of a part, and angled features, in a single setup.
What is the difference between 3+2 and full 5-axis machining?
In 3+2 (positional) machining, the rotary axes turn the part to an angle and lock while a 3-axis toolpath cuts. In simultaneous 5-axis machining, all five axes move together while cutting, which is needed for sculpted surfaces such as impeller blades.
Is 5-axis machining more accurate than 3-axis?
For parts with features on several faces, yes in practice: making them in one setup removes the error added every time a part is unclamped and re-clamped. For a part with features on one face, a 3-axis machine is just as accurate and costs less.
Does Dayao have 5-axis CNC machines?
Yes. Dayao runs 5-axis machining centers in its own factory in Chang’an, Dongguan. The number, brand and travel of the machines are being confirmed. 五轴台数 / 品牌 / 行程待补
What tolerance does Dayao hold on 5-axis parts?
Dayao holds ±0.01 mm as standard and ±0.005 mm on features you mark as critical, checked on a coordinate measuring machine (CMM). Position tolerances between faces are measured from the datums on your drawing.
Is 5-axis machining more expensive?
5-axis machine time costs more per hour than 3-axis. It often costs less per part when it replaces several 3-axis setups and special fixtures, especially for complex parts and small batches.
What is the largest part Dayao can machine on 5-axis?
The maximum part size depends on the 5-axis machine’s travel and table and is being confirmed. 五轴最大加工尺寸待补 Send the model and an engineer will confirm whether it fits.
Is there a minimum order for 5-axis parts?
No. Dayao has no minimum order for machined parts, so one prototype is fine. Programming is a one-off cost, so the price per part drops as quantity rises.
What files do you need for a 5-axis quote?
Send a 3D model, preferably STEP, plus a 2D PDF drawing with tolerances, material, finish and quantity. The 5-axis toolpaths are programmed from the 3D model.
Can you sign an NDA before I send my model?
Yes. Dayao can sign a non-disclosure agreement before you share 3D models or drawings. Tick the NDA box in the quote form or ask by email.
Sources and standards used on this page
- ISO 841:2001 — Industrial automation systems — Numerical control of machines — Coordinate system and motion nomenclature (A, B and C rotary axes about X, Y and Z).
- ISO 10791-6:2014 — Test conditions for machining centres — Accuracy of speeds and interpolations (incl. 5-axis kinematic tests).
- ISO 1101:2017 — Geometrical tolerancing (position tolerance between faces and datums).
- Hurco, “5-axis CNC machine configurations: the pros and cons” — trunnion and swivel-head machine layouts (machine builder, not a machining service).
- Dayao factory data (2026): founded 2014, 700+ machines including 5-axis machining centers, ±0.01 mm standard / ±0.005 mm critical tolerance, CMM inspection, IQC / IPQC / OQC, no minimum order for machined parts.
Reviewed by the Dayao engineering team · Updated October 2026
Send Your 3D Model for a 5-Axis Machining Quote
Send a STEP model and a PDF drawing with tolerances, material, finish and quantity. A Dayao engineer checks whether the part really needs 5-axis, suggests a cheaper 3-axis route when one works, and replies with an itemized quote. There is no minimum order, and an NDA can be signed first.