Precision Milling Components
3, 4 and 5-axis milled components to ±0.005 mm, from one-off prototypes to 10,000-piece runs.
Milled parts with pockets, thin walls and 3D contours that hold their shape after the last pass. We machine 3, 4 and 5-axis on DMG MORI machines, with in-process probing on anything that cannot afford a second setup error.
How we make it: Precision CNC machining service →
2–4 weeks
1 piece
ISO 9001:2015 · AS9100D · IATF 16949
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Linear tolerance | ±0.005 | mm |
| Positional tolerance | ±0.01 | mm |
| Surface roughness | Ra 0.4 | µm |
| Max part envelope | 800 × 600 × 400 | mm |
| Walls down to | 0.5 | mm |
| Spindle speed | 15,000 | rpm |
Available Materials
- Aluminium 6061-T6
- Aluminium 7075-T7351
- Steel 4140
- Stainless 316L
- Titanium 6Al-4V Grade 5
- Inconel 718
Typical Applications
- Aerospace structural brackets
- Automotive engine mounts
- Semiconductor vacuum components
- Medical instrument housings
- Robotics end-effector frames
Surface Finishes
- As-machined
- Bead blast
- Anodise Type II / III
- Passivate ASTM A967
- Chromate conversion
- Electropolish
Industries Served
- Aerospace
- Automotive & EV
- Semiconductor
- Medical
- Robotics
What drives the price of this part
Derived from the callouts on this page. Where a driver is not on the drawing, it is not on this list.
- Tolerance
- Linear tolerance at ±0.005 mm is the tightest callout this family carries. Tightening a callout is a process decision, not a machining decision: below the standard ±0.005 mm the work moves to grinding or jig boring, and the price moves with it.
- Part size
- Walls down to at 0.5 mm decides which machine the part lands on and how many setups it needs. Size is the driver buyers most often leave out of a first enquiry, and it is the one that changes the quote fastest.
- Surface finish
- Surface roughness at Ra 0.4 µm. Every step below the ordinary as-machined Ra 1.6 µm adds a finishing pass; a callout on a face nobody touches is the most common over-specification we quote.
- Material
- The first material listed, Aluminium 6061-T6, rates 9/10 on our machinability scale at 95 HB. On this shop's scale a harder alloy means slower passes and more tool changes, and that is cycle time the quote has to carry.
- Order size
- Minimum order is 1 piece, so on a first order setup and programming are spread over very few parts and they are most of the price. Repeat orders at the same quantity are cheaper without anything on the drawing changing.
See how cycle time is calculated in the machining time calculator and what else moves a price in the cost driver reference.
How these parts are inspected
Matched to the callouts above and the instruments actually on the floor.
- Coordinate measuring machine (Zeiss CONTURA G2, two machines, GR&R 8.4% on the critical feature)
- Dimensional report against the drawing, with a 100% check on critical features rather than a sample
- Certificate of conformance and the mill certificate with every shipment
- Surface roughness tester (Mitutoyo) against the Ra callout
- Bore gauges and an optical comparator for hole position and edge form
- First article inspection to AS9102, because this family carries an aerospace or automotive certificate
The full equipment list, with counts, is on the capability page; the inspection sequence is on quality and inspection.
Questions buyers ask
- Can you hold ±0.005 mm on a thin-walled pocket?
- Yes, if the wall is 0.5 mm or thicker and we can control the finishing pass. Below that the part deflects under its own cutting load and we will tell you at the DFM stage rather than after a failed first article.
- How does 5-axis help if the part still fits in 3 axes?
- Fewer setups. Each refixture is another chance to lose 0.01 mm between features, so on a part with bores on four faces we machine it in one operation and hold the position tolerance without a fixture stack.
Related part families
CNC Turned Shafts
Turned and ground shafts, pins and spindles held to 0.005 mm TIR on bearing journals.
Precision Chassis & Enclosures
EMI-shielded enclosures and instrument chassis, formed and welded to ±0.1 mm with gasket channels.
Inspection Fixtures & Gauges
CMM fixtures, check gauges and go/no-go tooling built from your CAD and certified dimensionally.