Diameter fits
Define fit classes for bearing and press-fit diameters.
MANUFACTURING CAPABILITIES
CNC Turning for Shafts, Bushings & Fittings
Shafts, sleeves, bushings, and threaded components made for dependable fit in mechanical assemblies.
We aim to reply within 1 business day · Mon–Fri, China time (UTC+8).
PROCESS & APPLICATION
Diameters, shoulders and threaded interfaces.
Turning rotates a workpiece against a cutting tool to create concentric diameters, grooves, bores, and threads. We focus on datum relationships, accessible tool paths, and the surfaces that determine how the part fits its assembly.
- Precision shafts and pins
- Bushings and sleeves
- Threaded inserts and mechanical spacers
PART PLANNING
Control fits, runout and tool clearance.
Tool clearance
Call out concentric relationships only where needed.
Runout & concentricity
Review very slender features for deflection during cutting.
MATERIALS, FINISH & ACCEPTANCE
Specify material, surface and diameter acceptance.
Stainless and carbon steels suit many load-bearing turned parts. Aluminum can reduce weight, while brass and engineering plastics may be useful for electrical, corrosion, or low-friction applications.
- Turning can leave a clean as-machined surface. Plating, passivation, anodizing for aluminum, or polishing may be considered when the part’s use calls for it.
- Diameter, roundness-related fit, thread form, and key lengths can be inspected according to the agreed drawing and part function.
PROJECT QUESTIONS
Before you send the drawing
Which parts are suited to CNC turning?
Parts whose main geometry is cylindrical, such as shafts, bushings, sleeves, and threaded pieces, are natural candidates.
Can a turned part also have milled features?
Yes. Flats, cross holes, and other secondary details can be reviewed as part of a combined process plan.
Should I specify surface roughness everywhere?
It is most useful to specify it on sealing, bearing, or cosmetic surfaces where it affects performance.
ENGINEERING PLANNING REFERENCE
Put numbers on the requirements.
Industry benchmarks for preparing your RFQ. The drawing review confirms the manufacturing route, capability and delivery schedule.
General metal features
A useful general-tolerance discussion point. State the drawing standard and dimension range; one blanket value does not cover every feature.
Selected critical features
A precision target for review, not a default for the whole part. Material, geometry, setup, temperature and measurement method matter.
Axis strategy
Compare 3-axis, indexed and simultaneous machining around tool access and datum control. The quotation confirms the proposed route.
Quantity comparisons
Use these RFQ quantities to compare prototype, pilot and repeat-part pricing. These are planning scenarios, not a stated MOQ.
Prototype schedule discussion
An initial manufacturing-window assumption for simple, stock-material parts. Finishing, inspection, capacity and shipping require separate confirmation.
Surface requirement example
An as-machined roughness discussion point. Identify functional faces; sealing, bearing and cosmetic surfaces may need different requirements.
Send overall dimensions and critical features for feasibility review. Production lead time starts from the agreed release conditions; transit time is separate.
BUYER QUESTIONS
Before you send your part.
Can I ask a question without uploading a drawing?
Yes. Describe the part, intended function and the decision you need help with. A drawing is optional for an initial discussion; a firm quotation needs a defined specification.
When should I expect a reply?
We aim to reply within 1 business day · Mon–Fri, China time (UTC+8). This is an initial review target, not a promise of a finished quotation within that period.
How are confidential or large files handled?
Discuss an NDA and the transfer method on WhatsApp before sharing restricted drawings. Website uploads accept PDF, ZIP, STEP or STP up to 10 MB.
Does prototype timing include delivery?
No. Separate material availability, manufacture, finishing, inspection and transport. The written quotation confirms the schedule for your part.
LET’S TALK ABOUT YOUR PART
Bring your drawing.
Define the next step.
Material, quantity, finish and critical features — start with what you know.