Diameter relationships
Seats and shoulders need the right datum, not just independent nominal sizes.
CNC TURNED PARTS · SHAFTS, SLEEVES & THREADED COMPONENTS
CNC turned parts defined by your fits and drawing.
A shaft is more than its outer diameter. Send the drawing for a custom shaft, bushing, sleeve or threaded body, and show the seats, shoulders, bores and runout requirements that matter at assembly.
Custom turned metal components; not stock shafts or machine spares.
01Drawing-defined turned components
02Threads, bores & shoulders reviewed
03Sample → repeat batch
WHO WE ARE
A drawing-led route for rotational metal components.
KEC Tour reviews non-standard turned metal parts for OEM and engineering buyers. The quote considers the part’s drawing, material, quantity, critical diameters and any finishing or inspection needs.
See the company and quality workflow →WHY BUYERS WORK WITH US
Control the relationships that make the shaft fit.
Thread and relief detail
The mating standard, engagement and runout can change the turning plan.
Verification planned early
Agree gauges and dimensional evidence for the functional surfaces.
IS THIS THE RIGHT RFQ?
Check the scope before you send.
This page is for a turned component with a defined mating or functional requirement.
Good fit for KEC Tour
- Drawing-defined shafts, spacers, bushings and threaded bodies
- Prototype or repeat-batch turned components
- Fits, runout or thread features to review
Outside this page’s scope
- Stock replacement shafts and retail fasteners
- Complete motors or assembled machines
OUR SERVICES
Turning operations tied to the drawing.
The part shape determines the setup, tool access and checks; a thread, bore or shoulder may change the route.
CNC turning
Steps, shoulders, grooves and controlled outer diameters.
Boring & internal features
Inner diameters, wall relationships and stepped bores.
Threads & secondary work
External or internal threads, cross-holes, flats and deburring by drawing.
Finish & inspection
Surface condition, runout and critical dimensions agreed for the order.
PART-TO-PROCESS MATCH
Inspect the turned geometry closest to yours.
Four individual representative models show different shaft and sleeve relationships; they are not a compatible assembly set.
Select a part to load its interactive model.
INTERACTIVE 3D · REPRESENTATIVE GEOMETRY
Rotate the part. Inspect the features.
Rotate the shaft, spindle, bushing or cylindrical housing to discuss datums, bores and shoulders. Your drawing defines the real dimensions.
Model geometry illustrates part families only. Threads, tolerances and performance come from your approved drawing.ENGINEERING SPECIFICATION
What to define on a turned-part RFQ.
A short list of functional relationships is more useful than a single “precision” label.
| Decision | What to define | Why it matters |
|---|---|---|
| Reference axis | Datum, centerline and how the part is located in assembly | Sets the basis for runout and concentricity checks. |
| Seats and fits | Mating diameters, lengths, shoulders and required fits | Defines the functional contact and measurement method. |
| Bore and wall | Inner diameter, depth, wall thickness and reliefs | Affects tool access, stiffness and inspection. |
| Thread | Standard, size, pitch, class and engagement | Controls tooling and mating compatibility. |
| Material and finish | Grade, condition, heat treatment and surface requirement | Changes the route and final dimensions. |
| Quantity and evidence | Prototype/batch demand and critical reports or gauges | Aligns setup cost and acceptance with the program. |
Use this as a discussion guide. Final requirements come from the approved drawing, application standard and purchase documents.
RFQ FILE PACK
Tell us what the turned part must mate with.
A complete pack reduces clarification rounds. You can still start with a sample or partial drawing.
Turned-part files
2D drawing and STEP/STP model or a dimensioned sample.
Mating parts
Bearings, couplings, housings or threaded partners that define the fit.
Volume
Prototype and batch quantities with target date.
Acceptance
Critical fits, runout, finish, gauge and material records.
No finished drawing yet? Send the sample photo and the dimensions you know; identify what remains undecided.
Start an RFQ ↗INSIDE THE WORKSHOP
See turning and part handling in the workshop.
Original workshop footage shows the turning environment and part handling. The approved drawing and quotation define the actual method and acceptance.
ILLUSTRATIVE ASSEMBLY STUDY
See the relationship between shaft and sleeve features.
This illustrative shaft/sleeve/washer/collar sequence makes the interface visible. It is not a fit check or proof that the separate viewer models mate.
APPLICATION & SOURCING DECISIONS
Choose the turned-part route by the interface.
These part families have different inspection priorities even when they share a lathe.
Stepped shaft
Specify the bearing or coupling seats, shoulder location and runout datum.
Threaded spindle
Define thread standard, relief, mating engagement and finish after threading.
Bushing or sleeve
Define bore-to-OD relationship, wall, end squareness and insertion method.
SAMPLE TO BATCH
Validate the first article, then repeat the control.
Agree which diameters, bores, threads and surfaces must be checked before a batch is released.
- 01
Identify datums
Confirm the reference axis and mating seats.
- 02
Plan operations
Review turning, boring, threading, secondary work and finish.
- 03
Check a sample
Measure the critical fits and record approved changes.
- 04
Control repeat work
Use the released revision, gauges and agreed evidence.
INSPECTION & DOCUMENTATION
Make fit and runout measurable.
No blanket tolerance, fit or thread-performance promise applies. Define the feature, datum and test method in the RFQ.
- Critical diameter and bore checks
- Runout or concentricity where specified
- Thread-gauge and material records by agreed scope
FACTORY DOCUMENTATION
Review the evidence behind the process.
Certificates are issued to Dongguan Xuxiang Precision Metal Products Co., Ltd. KEC Tour is the website brand, not the named certificate holder. Ask us to confirm the manufacturing entity, certified site, scope and applicability to your order.
Discuss inspection and documentation →
ISO 14001:2015Environmental management · View document ↗
QC 080000:2017Hazardous substances process management · View document ↗YOUR CONFIDENTIAL DRAWINGS
Need an NDA before sharing files?
Tell us before you upload controlled drawings. We can discuss the confidentiality agreement and the permitted review scope first. Share only files your organization authorizes you to disclose.
Request an NDA discussion ↗Read the Privacy Policy →Uploading a file does not itself create an NDA.
BEFORE YOU SEND
Useful answers for your RFQ.
Can you work from a sample?
A physical sample or dimensions can start the discussion; the final part definition and acceptance method must be agreed before production.
How should I specify runout?
Identify the datum axis, measured feature and acceptance value on the drawing.
Can a prototype route become a batch route?
Yes, after sample approval and review of volume, fixturing, finish and inspection requirements.
Can we discuss an NDA before sending CAD?
Yes. Contact KEC Tour before uploading restricted files.
Send the shaft, sleeve or bushing drawing.
Include the mating context, material, prototype or batch quantity and the cylindrical features that matter most.
Send your turned-part drawing ↗