Bore to Side Hole
Cross holes and ports may need to relate to the central bore, OD, shoulder or end face.
Turn-Mill Machining
Turn-Mill Machining for Parts with Turned and Milled Features
Turn-mill machining is suitable for components that combine turned diameters, bores, flats, slots, cross holes, radial holes, threaded features, wrench faces, grooves, and multi-side details. Where possible, related features are completed in one setup to reduce accumulated error and protect datum relationships.
Machining Range
DXSCNC focuses on small to mid-size precision turned and turn-mill components.
Max turning diameterUp to 400 mm
Max machining lengthUp to 500 mm
Typical machining tolerance: +/-0.02 mm for suitable CNC turned and turn-mill features after drawing review.
Tolerance feasibility depends on material, geometry, part size, wall thickness, surface treatment, workholding and inspection method. Send the drawing so the feature relationships can be reviewed before quoting.
Send drawings for size review
Share the drawing, material grade, tolerance requirements and quantity so we can confirm whether the part fits the machining range and process plan.
Send Drawings for ReviewBest-Fit Parts
- Shafts with flats, slots or radial holes
- Sleeves with cross holes or side features
- Flanged components with bolt patterns
- Threaded adapters with wrench faces
- Fittings with ports or cross holes
- Bushings with keyways or slots
- Complex rotational components with turned and milled features
Typical Turn-Mill Features
- Turned OD and ID features
- Bores and counterbores
- Cross holes and radial holes
- Milled flats and wrench faces
- Slots and lightening features
- Bolt patterns
- Side threaded holes
- Grooves and reliefs
- Face features and alignment surfaces
- Deburring around intersecting features
Why One Setup Matters
When turned and milled features are related, moving the part between separate machines can introduce accumulated error. Turn-mill machining can reduce handling and help protect relationships between diameters, bores, flats, side holes, bolt patterns and mating faces.
One setup is not automatically required for every part. We review the drawing to decide whether the feature relationships, tolerances and quantity justify turn-mill machining.
Typical reason to use turn-mill
Use turn-mill when a rotational part also needs controlled flats, cross holes, ports, slots, side threads, or bolt patterns that relate to the turned datums.
Datum Relationship and Accumulated Error
Flat to Thread
Wrench flats and threaded features may need consistent angular and axial position.
Bolt Pattern to Bore
Flanged components often require the central bore, bolt pattern, and sealing face to be reviewed together.
Slot to Shoulder
Slots, keyways and grooves may need controlled distance from a functional datum surface.
Mating Face to Rotational Datum
Assembly fit can depend on face quality, perpendicularity, bore condition, and burr control.
Inspection Method
We check how related features will be measured before committing to a machining plan.
Manufacturing Concerns
- Workholding for multi-side features
- Tool access for side holes and slots
- Burrs at intersecting holes
- Angular position of flats or ports
- Thread starts and reliefs
- Thin-wall deformation
- Surface treatment allowance
- Inspection access for related datums
Inspection Focus
- Bore and OD dimensions
- Feature position relative to datums
- Cross-hole and port condition
- Thread fit
- Bolt pattern location
- Sealing or mating face quality
- Runout and coaxiality when specified
- Burr check at intersecting features
RFQ Checklist
- 2D drawing and/or 3D model
- Material grade
- Quantity
- Tolerance and datum notes
- Thread standard and depth
- Angular position requirements
- Surface finish and treatment
- Areas where burrs cannot be accepted
- Assembly or mating-part notes
Send turn-mill drawings
We will review one-setup feasibility, feature relationships, accumulated error risk, inspection method, material behavior and packing needs before quoting.
Send Drawings for ReviewRelated Components
CNC Machined Shafts
Stepped diameters, grooves, threads, shoulders, cross holes, and controlled mating surfaces.
View details
Sleeves & Bushings
Bore control, OD/ID relationship, end-face quality, chamfering, cross holes, and deburring.
View details
Flanged Components
Central bores, bolt hole position, face quality, sealing surface control, and datum understanding.
View details
Threaded Components
Internal and external threads, thread depth, entrance chamfer, burr control, and gauge inspection.
View details
Adapters & Fittings
Connection parts for mechanical, industrial, brass, and fluid-control assemblies.
View detailsRelated Manufacturing Case
Review a real DXSCNC turn-mill component using customer-approved public photos. The case focuses on visible geometry, radial side-feature burr-control risk, finished-surface protection and drawing-review points without exposing confidential customer data.
Threaded turn-mill component with radial cross holes
See the real finished-part photos, evidence limits and buyer review points.
Turn-mill machining case studyRelated Brass Turn-Mill Case
Review a real DXSCNC brass turn-mill component case using customer-approved public finished-part photos. The case focuses on strict geometric tolerance review, CMM inspection planning, anti-oxidation treatment and individual packing protection.
Brass turn-mill component with CMM inspection
See the public project facts, finished-part photos and buyer review points.
Brass turn-mill case studyRelated Black POM Turn-Mill Production Example
Review a real DXSCNC production example for a 500-piece black POM long cylindrical mounting component. The page focuses on M15 end threads, milled side features, cross holes, counterbores, positional relationships and controlled plastic machining risks.
Black POM long cylindrical component
See real DXSCNC product photos and the public engineering review points for this drawing-based component.
View POM production exampleFeature Position Accuracy in Turn-Milled Parts
Read the engineering guide to cylindrical datums, angular positioning, cross-hole and counterbore relationships, POM workholding and inspection planning for position-sensitive turn-milled components.
Technical Note
The guide uses this black POM production example to separate confirmed project facts from general machining guidance.
Read feature-position guideFAQ
When should I choose turn-mill machining?
Choose turn-mill machining when turned diameters and milled features have functional relationships or when reducing handling can reduce risk.
Can turn-mill parts include cross holes?
Yes. Cross holes, radial holes, ports and side threaded holes are common reasons to review a part for turn-mill machining.
Does one setup always reduce cost?
Not always. We compare feature risk, quantity, tolerance requirements and setup complexity before recommending the process.
What drawings help most?
A 2D drawing with datum, tolerance, thread and surface finish notes plus a 3D model gives the clearest review path.