01 / OPERATION
OD Turning & Facing
Straight and stepped diameters, end faces, tapers and profiles. Identify the functional surfaces and any transitions that must match a mating part.
Drawing-Based TurningMade for your part, not a fixed catalog
Metal & Plastic PartsMaterial grade agreed before production
Prototypes & Repeat BatchesQuote for the quantities you need
Direct Factory CommunicationKnow who will make your parts
CNC turning for shafts,
sleeves and precision fits.
For a useful manufacturing discussion, show how the part fits and works. A bearing seat, sealing surface or threaded connection can each require a different acceptance check—even when they sit on the same component.
Review drawing requirementsTurned geometry
01Functional diameters02Shoulder locations03Datum relationships
CNC lathe operations, matched to the drawing.
Tell us what the part needs. We will confirm the tooling, workholding and secondary operations before accepting the job.
02 / OPERATION
Boring & Internal Features
Provide bore diameter, depth and whether the hole is blind or through. Tool reach and chip clearance matter for deeper internal features.[2]
03 / OPERATION
Threads & Grooves
Specify the thread form, pitch, fit class and useful length. For grooves, show the width, depth, radii and the function they perform.
04 / OPERATION
Turning with Milled Features
Flats, keyways and cross-holes may need live tooling or a separate milling operation. The route depends on equipment, access and the drawing.[3]
Long slender parts, deep bores, small features or special alloys need a part-specific review. Swiss-type turning and grinding are not assumed to be part of every job.
Custom turned parts.
Made to your drawing.
Shafts & Stepped Spindles
Multiple diameters and shoulders for drive, locating or support functions.
Discuss: Bearing seats · shoulder spacing · datum axis
Bushings & Sleeves
Hollow cylindrical parts with a defined relationship between the bore and outside surface.
Discuss: Bore fit · wall thickness · surface condition
Flanges & Hubs
Round interfaces with faces, bores and optional mounting features. Hole patterns may add a milling step.
Discuss: Face location · bore alignment · bolt pattern
Threaded Adapters
Custom threaded connectors and adapters made to a defined mating specification.
Discuss: Thread form · fit class · usable thread length
Pins & Shoulder Pins
Locating and joining parts with controlled diameters, lengths and end details.
Discuss: Diameter fit · straightness · end geometry
Spacers, Rings & Collars
Round spacing and locating components designed around the dimensions of your assembly.
Discuss: Face spacing · bore clearance · edge treatment
Materials for
metal and plastic turning.
| Material | What to specify | Request a quote |
|---|---|---|
| Aluminum Alloys | Alloy and temper, finish requirements and the final dimensions of mating surfaces. | |
| Stainless Steel | Grade, supplied condition, required surface finish and any passivation specification. | |
| Steel | Grade, hardness, heat-treatment sequence and any post-treatment machining requirements. | |
| Titanium Alloys | Grade, material traceability and critical surfaces or handling requirements. | |
| Brass | Alloy, any lead-content restrictions and the thread or sealing details. | |
| Copper | Grade, application requirements, finish and any appearance-sensitive surfaces. | |
| Inconel Alloys | Exact alloy, supplied condition and the full acceptance specification for review. | |
| PEEK | Exact grade, reinforcement or fillers and application-specific documentation. | |
| POM / Acetal | Grade, color, fillers if any and the working dimensions of sliding or mating features. | |
| Nylon | Grade, reinforcement and the condition in which dimensions must be inspected. | |
| Acrylic / PMMA | Grade, appearance requirements and whether optical finishing is part of the scope. |
Need a different grade? Include the exact specification and required documentation. Substitutions require your approval.
CNC turning tolerances.
Defined by your drawing.
| Requirement | Information to include |
|---|---|
| Diameters & fits | Nominal diameter, tolerance or fit designation, mating requirement and drawing units. Identify every bearing, sliding or press-fit surface. |
| Datums & runout | Identify the reference surfaces or axis and the required geometric controls. Keep diameter size, roundness and runout as distinct requirements. |
| Lengths & faces | Overall length, shoulder locations and any flatness, face-runout or perpendicularity callouts required by your design. |
| Internal features | Bore size, depth, entry details and any internal shoulders or grooves. State whether holes are blind or through. |
| Threads | Full designation, pitch, tolerance class, handedness, useful length and the required gauge or acceptance method. |
| Surface & final condition | Roughness parameter and units, edge treatment, heat treatment, coating specification and whether dimensions apply before or after finishing. |
Design guidance
for CNC turned parts.
Long, slender sections
Discuss supported length, workholding and whether center features are allowed. Slender sections can be sensitive to cutting forces and vibration; their acceptance criteria should be clear.[4]
Deep bores
Show the working bore length and internal geometry. Increasing tool overhang can make vibration, deflection and chip evacuation harder to control.[2]
Thin walls & rings
Define the important free-state dimensions and allowable clamping surfaces. Review how the part will be held, machined and inspected without changing the functional design.[4]
Threads near shoulders
Show usable thread length, mating engagement and any relief or runout permitted at the end. Do not rely only on a rendered CAD thread to convey the specification.
Grooves & sealing surfaces
Show groove width, depth, corner details and the sealing or retaining specification. Ask for a review of the required tool access and inspection method.
Cross-holes, flats & keyways
Mark angular relationships to other features. These details can need an additional setup or live tooling; confirm the route instead of assuming every feature is turned.[3]
Design changes are proposals for your review—not automatic edits to the part. Keep drawing revisions and approvals aligned before production.
Surface finishes
for your turned parts.
Inquiry preference: Not specified
A finishing process is not a substitute for a surface specification. Identify the areas that need a particular roughness or final dimension.[4]
Check the features.
Not just the appearance.
Set acceptance before production
Identify critical dimensions, datums and any material or finishing records. Agree the inspection scope and reporting format as part of the order.
Match the method to the feature
Diameter, thread fit, runout and surface roughness call for different checks. Confirm suitable measuring equipment and acceptance methods for the specified features.
Keep revisions and records aligned
For repeat batches, confirm the approved drawing revision, sample requirements, inspection frequency and the way parts or lots need to be identified.
Make responsibility explicit
When a partner process is needed, agree who performs the work, who checks it and who handles questions about conformity before the order is placed.
CNC turning cost.
Quote the whole job.
Prototypes
Start with the design questions the sample needs to answer: fit, assembly, surface condition or functional testing.
State the sample quantity and the acceptance decision it supports.Small-Batch Production
Confirm the released revision, quantity, finishing, inspection and packaging before producing the first batch.
Discuss any first-piece approval and its effect on the schedule.Repeat Production
Share expected order frequency and any changes to quantities or requirements between batches.
Agree revision control and repeat-order scope rather than assuming they remain unchanged.What changes a turning quote?
Start with a drawing that separates essential features from preferences. Include the initial quantity and likely repeat quantities so the manufacturing plan can be discussed in context.
Material & starting stock
Exact grade, supplied condition, sourcing requirements and material removed from the starting shape.
Tooling & process route
Part geometry, workholding, tool access and secondary operations such as cross-drilling, milling or grinding.
Finishing & acceptance
Coatings, masking, required records and inspection scope—not just time on the lathe.
Quantity & delivery
Setup shared across a batch, repeat-order scope, material availability and the requested delivery destination.
Minimum order quantity, production lead time and shipping arrangements are confirmed per project. No instant price or unverified delivery promise is shown here.
Manufacturing roots.
A direct conversation.
“My father built this business through trade shows and long-standing customers. I want to carry that experience forward—and make it easier for you to understand who is making your parts.”
Kevin10 years in the CNC industry · vetcnc
Read Our StoryOur manufacturing roots are in China, with multiple factories and a wider circle of manufacturing partners. The aim is straightforward: explain what fits our capabilities and be open about the route when a project needs something different.
Our factories
Discuss a direct manufacturing scope when the part fits.
Coordinated partners
Agree the partner work, communication and responsibilities in advance.
Direct introductions
Where appropriate, connect with a suitable partner and discuss the work directly.
Start with the application.
Then define the requirements.
Aerospace
Bushings, sleeves and interface components. Confirm traceability and qualification requirements.
Application RequirementsMedical Devices
Instrument and assembly components. Specify material, cleanliness and documentation needs.
Application RequirementsAutomotive
Shafts, pins, spacers and adapters. Identify critical fits and repeat-batch requirements.
Application RequirementsDefense
Share qualification and information-handling requirements before exchanging restricted drawings.
Application RequirementsSemiconductors
Precision interfaces and equipment components. Discuss surface and cleanliness requirements.
Application RequirementsApplication examples do not establish sector approval or certification. Specialized requirements are reviewed before a project is accepted.
A clear next step at every stage.
Share the specification
Send the CAD model, matching drawing, material, quantity and target delivery.
Review the route
Discuss fit, tooling, stock, finishes, inspection and any partner processing.
Approve the scope
Confirm price, revision, acceptance requirements and delivery arrangements in writing.
Make, check & deliver
Proceed to the agreed production, inspection, records and packaging plan.
CNC turning.
Your questions answered.
What is the difference between CNC turning and CNC milling?
Turning rotates the workpiece and is commonly used for round profiles, faces and diameters. Milling uses rotating cutters to create features such as pockets, flats and hole patterns. A part can require both processes.[1][3]
Can you make parts from my drawing rather than a catalog?
Yes—start with your own part specification. The examples on this page illustrate part families, not stocked items. Send your model and matching drawing so we can review the shape, material, quantity and acceptance requirements.
What tolerances and maximum part size can you accept?
These need a drawing-based review. Provide the outside diameter, total length, material, critical fits and geometric controls. The quote confirms accepted requirements; a generic machine envelope or tolerance is not used as a promise for every part.
Can you turn parts with threads, grooves and internal bores?
Include those features in the inquiry with their full dimensions and acceptance requirements. Thread forms, useful length, bore depth, groove access and the workholding arrangement all need review before the scope is confirmed.
Can a turned part also have cross-holes, flats or a keyway?
These features may be produced with live tooling or an additional milling setup. Mark their locations and angular relationships on the drawing. The quotation should identify the proposed process route, not assume all features are completed in one setup.[3]
Do you offer Swiss-type turning or grinding?
Do not assume either is included in a standard turning inquiry. Send the slenderness, dimensions and surface requirements that drive the need. We can discuss whether a specialist route, partner coordination or direct introduction is appropriate.
Can I order prototypes or a small batch?
Include the quantity you actually need and what the first parts must demonstrate. Minimum quantities, setup costs and any sample-approval stages are agreed for the project rather than advertised as one rule for every component.
How are the price and lead time determined?
The drawing, material condition, quantity, tooling, secondary operations, finish, inspection and delivery requirements define the scope. Share a requested delivery date; the achievable schedule and any dependencies are confirmed in the quote.
Will my part be made by your factories or by a partner?
Our first step is to review the fit with our factories. For work outside that fit, we can discuss coordinating suitable partners or making an introduction. Agree the manufacturing parties, inspection responsibilities and commercial relationship before placing the order.
What files should I send, and how do I handle confidential drawings?
A STEP or IGES model plus a matching PDF drawing is a useful starting point. Include units, part number and revision. This preview accepts one file or a ZIP up to 20 MB, but sends nothing. Agree confidentiality and an appropriate transfer method before sharing sensitive or restricted information.
Send the drawing. Start with the critical features.
- CAD model and matching drawing, with part number and revision.
- Material grade, finish and the quantity you need.
- Critical diameters, datums, runout, threads and inspection records.
- Delivery date, destination and any repeat-order plans.
Not ready to share confidential files? Start with a non-sensitive project description and state any confidentiality requirements.
Technical references & scope of guidance
General process guidance is based on the references below. Their published machine limits, tolerances, prices and delivery claims are not vetcnc specifications. Acceptance is always confirmed for the actual part.