Shafts with Cross Holes
Rotational shafts requiring side holes, slots, flats, or milled reference surfaces.
Turn-Mill Machining
Turn-Mill Machining for Rotational Parts with Milled Features
Turn-mill machining combines turning and milling in one coordinated process. It is suitable for rotational parts that also include cross holes, flats, slots, side features, off-center holes, milled surfaces, or multiple machining orientations.
Why Use Turn-Mill Machining?
One Setup Strategy
Turning and milling features can be completed with fewer fixture changes when the part structure allows it.
Better Feature Alignment
Reducing repeated clamping helps control the relationship between turned diameters and milled features.
Complex Rotational Parts
Suitable for shafts or fittings that also need cross holes, flats, slots, or side machining.
Lower Transfer Risk
Less movement between machines can reduce accumulated positioning error and handling risk.
Typical Turn-Mill Machined Parts
Typical part types depend on the drawing, material, tolerance, surface finish, quantity, and assembly requirements.
Complex Fittings
Round fittings, adapters, connector bodies, and couplings with multiple side features.
Precision Rotational Components
Parts where turned diameters and milled features must maintain positional relationship.
Project Review Focus
Before production, the drawing, CAD model, material, tolerance, surface finish, and inspection points should be reviewed together.
| Review Item | Why It Matters | Typical Check Points |
|---|---|---|
| Turned + Milled Features | The process is useful when a part includes both cylindrical and non-cylindrical features. | Diameters, flats, side holes, slots, grooves, cross features. |
| Datum Relationship | Turn-mill helps keep related features in one coordinated setup strategy. | Concentricity, perpendicularity, hole-to-diameter position, face alignment. |
| Part Complexity | More complex features may require process planning before quotation. | Tool access, live tooling, sub-spindle needs, fixture method. |
| Production Quantity | Turn-mill can be useful for repeatable parts where setup reduction matters. | Prototype, low-volume, batch production, repeat orders. |
Turn-mill machining is not simply CNC turning. It is selected when a rotational part also needs milled features and the setup strategy can reduce transfer and alignment risk.
Need a Project Review?
Send your CAD file, drawing, material requirement, quantity range, tolerance notes, and surface finishing needs. EASEMFG can review the process route and suggest a practical machining approach.
Request a Quote