CNC milling, 3- and 5-axis
Prototypes to series, milled in audited shops in our Bursa network. Send STEP and a PDF drawing; we come back with a route, a price and a lead time.
| Process | CNC milling, 3- and 5-axis |
|---|---|
| Materials | Al, stainless, steel, brass |
| General tolerance | ISO 2768-m |
| Documents | EN 10204 3.1, FAI, measurement report |
| Contact | sales@ertas.engineering |
When milling is the right choice
Milling suits parts that are mostly flat faces, pockets, slots and holes at different angles: brackets, housings, plates, fixtures. A 5-axis machine reaches several faces in one clamping.
Round parts with a single axis are cheaper turned. Thin parts that can be cut flat and bent are cheaper in sheet metal. If your part is a mix, we route it and tell you why.
| Part shape | Milling | Turning | Sheet metal |
|---|---|---|---|
| Block with pockets and holes | First choice | Rarely | No |
| Round shaft or bush | Flats, cross holes | First choice | No |
| Thin, flat or bent part | Thick plate only | No | First choice |
Design rules that cut cost
- Match inside corners to the toolGive inside corners a radius larger than the cutter radius. A sharp inside corner needs a smaller tool or a second operation.
- Keep pockets shallowDeep, narrow pockets need long, thin tools that flex. Widen the pocket or make it shallower.
- Use standard hole sizesStandard drill and thread sizes use tools the shop already has. Odd diameters need a bore or a special tool.
- Tolerance only functional featuresBearing seats and sealing faces get their own tolerance. Everything else stays on ISO 2768-m.
- Cut the number of setupsEvery extra clamping adds time and stack-up error. Keep features reachable from as few sides as you can.
Materials
Grades we machine through the network. Anything else, ask: we confirm before you order.
| Group | Grades | Notes |
|---|---|---|
| Aluminium | EN AW-6061, 6082, 7075 | Anodizing available. Hard anodizing |
| Stainless steel | 1.4301, 1.4404 | Passivation |
| Carbon and alloy steel | C45, 42CrMo4 | Powder coating available. Zinc plating |
| Brass | On request | Send the alloy with the drawing. |
| Plastics | On request | Send the grade with the drawing. |
General tolerance ISO 2768-m; tighter tolerances per drawing, confirmed with you before the order.
What you receive
| Item | What it is | When |
|---|---|---|
| Quote | Process route, price, lead time | After STEP + PDF |
| Milled parts | Made to your drawing | With order |
| Material certificate | EN 10204 3.1 | On request |
| First article | FAI report | On request |
| Measurement | Measurement report | On request |
| Conformity | Certificate of conformity | On request |