CNC (Computer Numerical Control) machining uses computer-programmed machine tools to remove material from a solid workpiece, producing precise metal components with complex geometries. Unlike forming processes, CNC machining creates parts directly from CAD models — no tooling required, making it ideal for prototypes, low-to-medium volume production, and parts requiring tight tolerances.

At Conwhole, we operate 3-axis and 4-axis CNC milling centers alongside CNC lathes for turning operations. This combined milling and turning capability means we can produce prismatic parts (brackets, housings, plates) and cylindrical parts (shafts, bushings, fittings) — all from one supplier.

Key Takeaways:
– CNC Milling: 3-axis and 4-axis vertical machining centers
– CNC Turning: Precision lathes for shafts, bushings, and cylindrical components
– Max part size (milling): 1,000 × 500 × 500 mm
– Max turning diameter: Ø400 mm, length 800 mm
– Tolerance: ±0.01 mm (standard), ±0.005 mm (precision)
– Materials: Aluminum, stainless steel, mild steel, brass, engineering plastics
– No tooling required — cost-effective from 1 to 10,000+ pieces
– Surface finishing in-house (anodizing, plating, powder coating)

Industrial Equipment Components

– Machine tool spindles, bearing housings, and slide blocks

– Pneumatic cylinder end caps & manifolds

– Pump bodies, valve blocks and hydraulic fittings

– Conveyor system drive shafts and roller brackets

Automotive & Motorsport Parts

– Engine mounting brackets and adapter plates

– Brake caliper brackets and suspension bushings

– Custom pulley wheels and shaft collars

– Exhaust system flanges, and sensor mounts

Medical & Laboratory Equipment

– Instrument housings, enclosures and mounting frames

– Fluid manifold blocks and connector fittings

– Test fixture plates and positioning stages

– Surgical tool handles, guides and adjustment knobs

Electronics & Thermal Management

– Heat sink bases with fin channels

– Electronics enclosure housings with EMI sealing grooves

– Connector panel plates and mounting brackets

– Test socket bases and probe guide plates

Furniture & Architectural Hardware

– Custom hinge bodies and pivot pins

– Handrail connectors and stanchion bases

– Display stand fittings and adjustable feet

– Decorative machined knobs and pull handles

3-axis and 4-axis milling plus CNC turning in-house — your prismatic and cylindrical parts ship together from one source, reducing coordination complexity.

Our 3D fiber laser tube cutting systems handle round, square, rectangular, and custom profiles in a single setup — eliminating secondary drilling and milling operations.

We stock aluminum, stainless steel, mild steel, brass, and engineering plastics, with in-house anodizing, plating, and powder coating — one supplier, one shipment.

CMM inspection reports and material certificates can be provided as standard. We machine strictly to your drawing tolerances, then verify and validate every dimension.

Q1: What CNC machining processes do you offer?
We offer 3-axis and 4-axis CNC milling for prismatic parts and CNC turning for cylindrical components. Our combined mill-turn capability covers the vast majority of metal part requirements.

Q2: What tolerances can you hold?
Standard machining tolerance is ±0.01 mm (0.0004″). For precision features, we hold ±0.005 mm (0.0002″). Tolerances are verified using CMM (Coordinate Measuring Machine) inspection and documented in inspection reports.

Q3: What is the minimum order quantity?
There is no minimum — we machine from 1 piece for prototypes to 10,000+ pieces for production. Because CNC machining requires no tooling, small quantities remain cost-effective compared to processes like stamping or die casting.

Q4: What materials do you machine?
We machine aluminum (6061, 7075), stainless steel (SUS304, SUS316), mild steel (Q235, 45# steel), brass (C360), and engineering plastics (POM, nylon, PTFE). We stock common grades and can work with customer-supplied material.

Q5: What surface finishes do you offer?
In-house finishing includes anodizing (clear, black, colored), zinc and nickel plating, powder coating, bead blasting, passivation for stainless steel, and chemical film (Alodine). External treatments like hard anodizing and electropolishing are also available.

Q6: How long does it take from drawing to first part?
Typical prototype lead time is 3-7 business days from drawing approval. Production lead time is 1-4 weeks depending on quantity and complexity. We provide a delivery schedule with your quotation.

Q7: What file formats do you accept?
We accept STEP (.stp, .step), IGES (.igs), SolidWorks (.sldprt), and 2D PDF drawings. For parts with GD&T callouts, please include the toleranced drawing alongside the 3D model.

Q8: Can you machine parts with internal threads and complex internal features?
Yes. We perform thread milling, tapping (metric and imperial), boring, reaming, and internal grooving. For complex internal geometries, we evaluate tool access during DFM (Design for Manufacturability) review before quoting.

Send us your 3D CAD files and 2D drawings for a free DFM review and quotation within 24 hours.