Diameters and fits
Identify shaft or bore fits, diameter limits and whether dimensions apply before or after treatment.
CNC turning
CNC turning.
Define the axis. Check the fit.
For shafts, bushes, sleeves and rings. Start with diameters, shoulders and threads, then identify the coaxial relationships your assembly needs.
Request a turning quoteCompare machining routes
Machined-parts purchasing information
- Order quantitySingle-piece and small-batch orders. MOQ: 1 piece.
- QuotationQuotation within 24 hours.
- ProductionProduction lead time: 10–15 days to dispatch.
- DeliveryDelivery according to the agreed schedule.
Rotational features come first.
Turning cuts a rotating workpiece to form diameters, shoulders and other rotational features. Bores, threads and grooves belong in the same drawing as the mating diameters. Flats or cross-holes may need additional operations.
Specify the datum axis and any runout or coaxiality requirement on the drawing. Liwen coordinates the full part, including milling or finishing, with the independent manufacturer. The material, released revision, inspection scope and delivery remain order-specific.
A turning enquiry, organised around the axis.
Axial relationships
State datum references and the required runout or coaxial relationship. Include shoulder locations and functional end faces.
Threads and grooves
Provide the thread specification, engagement needs and any groove or undercut detail that affects assembly.
Secondary features
Include cross-holes, flats, milling and marking. The quotation must cover the complete part, not only the turned profile.
Know what will be checked.
DrawingThe released revision for your order
1
Which dimensions affect fit or assembly?
2
Does coating change a critical size?
3
What datum and measurement basis apply?
4
Which records need to accompany the parts?
ReviewLiwen follows your agreed requirements
A close fit needs a clear requirement. Tell us what must fit together, whether dimensions apply before or after treatment, and which features need inspection records.
Material requirements for
CNC turning.
Specify the grade, condition and any certification needed. Grade and availability confirmed with your quotation.
Finishing and secondary operations for
CNC turning.
Turning surface
State fit, thread and functional surface requirements.
Surface preparation
Agree cosmetic surfaces and texture before production.
Protective finish
Consider coating in the final fit and dimensional criteria.
Other finishes
Specify polishing, plating, marking or other secondary work.
Material and packaging requirements
Tell us about material, packaging or documentation requirements so they can be included in your quotation.
Discuss your requirements →Follow the axis through to inspection.
Confirm material, revision and quantity, plus fits, thread callouts and reference datums.
Discuss part length, slender sections, clamping and the sequence of turned and secondary features.
Liwen follows turning, milling and finish questions with the independent manufacturer.
Agree the measurement basis for diameters, datum relationships and final fits; records follow the order.
When a part
needs review.
Send the order or batch, photographs and measurement basis. Molitech reviews the concern and coordinates an investigation with the manufacturer.
The agreed acceptance standards determine the solution. Rework, replacement, costs and timing follow the order agreement.
Contact LiwenManufacturing and inspection details (optional)
Manufacturing & Inspection Review Before Production
Carry clear requirements from drawing to acceptance. Liwen coordinates questions with the independent manufacturer; review scope and records are agreed for your order.
Drawing review
Identify the drawing revision, key dimensions, datums and functional interfaces. Flag missing or conflicting requirements for customer clarification.
Manufacturability
Review tool access, workholding, thin walls and difficult features with the proposed independent manufacturer. Customers approve any proposed design changes.
Tolerance risk
Distinguish functional fits and feature relationships from general requirements. Assess demanding tolerances for the particular part and route.
Inspection alignment
Agree the measurement basis for critical features, required records and any sampling or acceptance criteria in the order. Resolve different measurement interpretations before production.
Cost options
Discuss possible changes to material, geometry, finish or quantity against function and inspection requirements. Savings are assessed for the project rather than guaranteed.
Customer confirmation: unresolved requirements, proposed design changes and acceptance arrangements need your approval before the affected work proceeds. Molitech remains your contracting seller.
CNC turning FAQs
Which dimensions should I identify first?
Identify fits, threads, runout relationships and reference datums where they matter to the assembly. Avoid relying on an unmarked general expectation.
Can turning and milling be coordinated?
Yes, the enquiry can cover the full part. The selected operations and inspection scope are confirmed in the project quotation.
How do I request a quote?
Send the drawing revision, material, quantity, destination and target delivery date. Use an authorised link or agree a confidential email route with Liwen.
What tolerances and lead times can you offer?
The drawing and selected route define the tolerance review. Quotation within 24 hours. Production lead time: 10–15 days to dispatch. Delivery according to the agreed schedule. Precision requirements are reviewed for the part.
Who is responsible for my order?
Molitech quotes, contracts and receives payment as your seller. Independent partner manufacturers produce the parts.
What about threads and features on different faces?
Include the thread callout and any flats, holes or other secondary features in the same drawing. Let us know which diameters or relationships matter to assembly.
Ready to review a shaft or sleeve?
Send the complete drawing with mating diameters, threads and datum relationships highlighted.