CNC Milling and Turning Services
Under One Roof in Dongguan

CNC milling uses a rotating cutter that moves around a stationary workpiece — best for prismatic parts (brackets, plates, housings, anything that isn't rotational). CNC turning spins the workpiece against a stationary cutting tool — best for cylindrical parts (shafts, bushings, fittings, threaded components). Most real-world parts use one process; about 15-20% of parts benefit from both being applied to the same workpiece.

Yes — this is the most common reason customers come to a combined milling-and-turning shop. Examples: a drive shaft with a keyway (turn the cylinder, mill the keyway), a valve stem with a hex drive (turn the body, mill the hex), a pump rotor with bolt patterns (turn the OD, mill the bolt circle). We run these on mill-turn centers when the geometry fits in one setup, or sequence the operations across our lathes and mills when not.

Typically 15-25% lower than splitting the work across separate mill and lathe shops. The savings come from: no second-vendor margin, no inter-shop logistics, no re-quote overhead, and consolidated fixturing/inspection costs. The bigger win is usually tighter tolerance — features turned and milled with the same fixture reference stay more concentric than features handed off between vendors.

Swiss-type lathes (Star, Citizen, Tsugami) feed the bar stock through a guide bushing positioned close to the cutting tool — this dramatically reduces deflection on long thin parts. They're the best choice for high-volume precision small parts (Ø0.5-32 mm) with tight tolerance (±0.005 mm). Conventional CNC lathes are better for larger-diameter and shorter parts (Ø32-500 mm). We run both fleets.

Standard lead times: pure CNC milling 3-5 business days, pure CNC turning 3-5 days, combined mill+turn parts 5-7 days. Rush orders (24-72 hour turnaround) available for simple parts when capacity allows. Production volumes (100+ pcs) typically ship in 10-15 days depending on material and finish. Quote response within 1-4 hours of file upload.

Every material we stock can be machined on both processes — aluminum (6061, 7075, 2024), stainless (303, 304, 316L, 17-4 PH), titanium (Grade 2, Grade 5), brass (C360, C260), copper (C101, C110), carbon and alloy steels (4140, 4340, 1045), tool steels (D2, H13, A2), and engineering plastics (PEEK, POM, PTFE, Nylon, ABS). Some materials are easier in one process than the other — brass C360 turns beautifully; aluminum 6061 mills cleanest. We'll recommend based on your geometry.

±0.005 mm (5 microns) on critical features when the drawing specifies. Standard production tolerance is ±0.01 to ±0.025 mm. The advantage of mill-turn work in a single setup is feature-to-feature tolerance: a milled cross-hole stays concentric to the turned OD within ±0.01 mm, because both reference the same chuck position. Splitting the work across separate machines re-introduces fixturing error.

Yes. Our Swiss-type lathes are bar-fed and run lights-out for high-volume turned parts (10,000-100,000+ pieces). Production milling runs on our DMG MORI and Doosan machining centers with pallet changers. Typical production batches: 100-50,000 pcs depending on cycle time. We don't have a minimum — same quality on 1 piece as on 50,000.

STEP file alone is enough to start, but a 2D drawing alongside is strongly recommended for any part with tight tolerance, GD&T, surface finish requirements, or critical inspection callouts. The 2D drawing tells us what features matter most. We also accept IGES, SolidWorks (.SLDPRT/.SLDASM), DWG, DXF, PDF, X_T. Hand sketches OK for simple parts — we'll redraw in CAD at no charge.

30+ finishes in-house: anodize (Type II decorative or Type III hard-coat in any RAL/Pantone color), nickel/chrome/zinc plating, powder coating, PVD coating (gold, black, titanium), passivation for stainless, polishing (mirror finish), brushed/satin, sandblasting, bead blasting, black oxide. Threads can be tapped, rolled, or single-point cut. Edges can be deburred manually or by tumbling.

Yes, at zero cost. Email a mutual NDA to redowan@gh-goldenhot.com — we sign and return within 24 hours before any engineer accesses your files. Your CAD files and drawings are stored on encrypted servers, never shared with third parties (including other Ginwate clients), and deleted 12 months after delivery on request.

Three real differences. (1) Same engineer owns the part from quote to ship — no information loss across vendor handoffs. (2) Single fixturing reference means tighter inter-feature tolerance on hybrid parts. (3) Single quote, single shipment, single set of certifications — less administrative overhead and 15-25% lower total landed cost. The trade-off: a vendor focused only on Swiss-type turning may beat us on pure-turning unit pricing for very-high-volume small parts (200K+ pieces).