CNC machining capabilities and machine list
Boyang Hardware operates 54 machine tools in Zhongshan, Guangdong, China: 17 three-axis and 7 four-axis vertical CNC machining centres, 6 CNC turning machines, 4 turn-mill combination machines, 7 milling machines, 6 grinding machines, and 7 wire EDM machines. Alongside machining it offers aluminium, zinc and brass die casting, injection moulding, metal stamping and sheet metal fabrication, surface treatment, and assembly. Achievable tolerances run from 0.1 mm to 0.001 mm depending on feature and process, and every production run is 100% inspected before shipment using a 3D coordinate measuring machine, optical projector, vernier calipers and height gauges.
CNC machining
CNC machining covers the majority of work at Boyang Hardware and needs no tooling, which makes it the standard route for prototypes, low-volume builds and any part whose design is still moving. Milling is split across three-axis, four-axis and five-axis machines; turning is handled by CNC lathes and turn-mill combination machines that complete a part in one fixturing.
CNC milling — 3-axis, 4-axis and 5-axis
- 3-axis milling (17 machines). The workhorse route for prismatic parts: pockets, profiles, slots, drilled and tapped hole patterns, face and shoulder milling. Tolerances of ±0.02 mm are routine.
- 4-axis milling (7 machines). A rotary fourth axis indexes or simultaneously rotates the workpiece, so features on several faces are cut in one set-up. This removes the position error that accumulates when a part is re-fixtured between operations, and typically holds ±0.01 mm.
- 5-axis machining. Two rotary axes plus three linear axes reach contoured, compound-angle and undercut surfaces in a single set-up — impellers, turbine-style geometry, complex aerospace and medical shapes.
CNC turning and turn-mill combination
- CNC turning (6 machines). Rotationally symmetric parts: shafts, bushings, fittings, connectors, threaded components, bores and grooves. Concentricity is inherently good because the part stays on one axis of rotation.
- Turn-mill combination (4 machines). Turning and milling on one platform. Cross-drilled shafts, valve bodies and fittings with milled flats keep their true position relative to the turned diameter, because the part is not moved between machines.
Wire EDM and grinding
These two processes handle what milling and turning cannot: hardened material, sharp internal corners, and surfaces that have to be flat or round to a few microns.
- Wire cut EDM (4 machines). Cuts any electrically conductive material regardless of hardness, with a kerf that produces sharp internal corners and no cutting force. Used for dies, punches, precision apertures and hardened parts that would distort under a milling cutter.
- WEDM-MS, medium-speed wire EDM (2 machines). Higher cutting speed than standard wire EDM with a better surface finish, for fine features where both rate and finish matter.
- Standard WEDM (1 machine). General EDM work and roughing passes.
- Grinding (6 machines). Precision finishing of hardened or critical surfaces — bearing seats, sealing faces, guideways, and shaft diameters where roundness and surface finish are specified. Typically ±0.005 mm.
Die casting
Die casting injects molten metal into a hardened steel die, producing a near-net shape in a single cycle. It is the lowest cost-per-part route at volume for parts with the right geometry: fairly uniform wall thickness, draft on all vertical faces, and no deep undercuts without slides.
| Alloy | Characteristics | Typical parts |
|---|---|---|
| Aluminium | Best strength-to-weight of the cast alloys; accepts anodising and powder coating | Housings, enclosures, heat sinks, structural brackets |
| Zinc | Highest as-cast precision and thinnest walls; good plating response | Small precision components, hardware, fittings, decorative parts |
| Brass | Corrosion resistance, machinability, electrical conductivity | Valve bodies, electrical components, marine fittings |
As-cast tolerance is around ±0.05 mm, so critical features are usually finish-machined after casting. Boyang Hardware machines its own castings in-house, which removes the tolerance and schedule risk of shipping castings to a second supplier for finishing.
Injection moulding
Injection moulding covers plastic components and metal inserts over-moulded with plastic, produced alongside the machined and cast parts they assemble with. Running all three processes in one facility means a product that mixes a machined aluminium housing, a cast bracket and a moulded cover arrives as one matched set rather than three shipments from three suppliers.
Metal stamping and sheet metal fabrication
Blanked, pierced and formed sheet components for parts where a press tool is the right economics: clips, plates, contacts, brackets and chassis parts, typically to ±0.10 mm. Sheet metal fabrication covers folding, cutting and welded or riveted assemblies. Secondary machining, tapping and finishing are carried out in-house where a stamped part needs a precision feature.
Surface treatment
Finishes are applied to specification and the certificate for the finish travels with the parts.
| Finish | Applies to | Purpose |
|---|---|---|
| Anodising | Aluminium | Corrosion resistance, colour, wear resistance on a thin oxide layer |
| Hard anodising | Aluminium | Thicker, harder oxide layer for sliding and wear surfaces |
| Sand blasting | Most metals | Uniform matte texture; often a preparation step before anodising or coating |
| Polishing | Metals and plastics | Surface finish reduction, reflectivity |
| Annealing and heat treatment | Steels, aluminium, titanium | Relieve internal stress, adjust hardness and machinability |
| Zinc plating | Steel | Sacrificial corrosion protection |
| Chrome plating | Steel, brass, zinc | Hardness, wear resistance, decorative finish |
| Powder coating and painting | Metals | Durable colour and corrosion protection |
Assembly, testing and packing
Multi-part assemblies are built to the customer bill of materials, checked against the assembly drawing, and packed for shipment. Standard packing is poly bag and carton; EPE foam or a wooden case is used for higher-value or fragile parts. Shipping terms offered are EXW, FOB, CIF, CNF, DDP and DDU.
Complete machine inventory
Below is the full list of machine tools, counted individually at the Zhongshan facility. The total is 54.
| # | Machine type | Units | Function |
|---|---|---|---|
| 1 | 3-axis vertical CNC machining centre | 17 | Prismatic machining, pockets, profiles, hole patterns |
| 2 | 4-axis vertical CNC machining centre | 7 | Multi-face machining in one set-up |
| 3 | CNC turning machine | 6 | Shafts, bushings, fittings, threads, bores |
| 4 | Turn-mill combination machine | 4 | Turned parts with milled or cross-drilled features |
| 5 | Milling machine | 7 | Secondary operations, fixturing, short runs |
| 6 | Grinding machine | 6 | Precision finishing of hardened and bearing surfaces |
| 7 | Wire cut EDM | 4 | Hardened material, sharp internal corners |
| 8 | WEDM-MS (medium-speed wire EDM) | 2 | Fine features, improved surface finish |
| 9 | WEDM (standard) | 1 | General EDM work |
| Total machine tools | 54 |
Inspection equipment
| Equipment | Used for |
|---|---|
| 3D coordinate measuring machine (CMM) | Dimensional verification of complex geometry, true position, and features that calipers cannot reach |
| Optical projector | Profile comparison of small parts, radii, threads and form |
| Vernier calipers | General linear dimensions in-process and at final inspection |
| Height gauge | Datum-based height and step measurement |
Achievable tolerances
| Process | Typical | Best achievable |
|---|---|---|
| 3-axis CNC milling | ±0.02 mm | ±0.01 mm |
| 4-axis / 5-axis CNC milling | ±0.01 mm | ±0.005 mm |
| CNC turning | ±0.01 mm | ±0.005 mm |
| Grinding | ±0.005 mm | ±0.001 mm |
| Wire EDM | ±0.005 mm | ±0.002 mm |
| Die casting (as cast) | ±0.05 mm | ±0.03 mm |
| Injection moulding | ±0.05 mm | ±0.02 mm |
| Metal stamping | ±0.10 mm | ±0.05 mm |
How these tolerances are inspected and documented →
Ordering, lead time and capacity
| Minimum order quantity | No fixed minimum. Prototypes and small batches accepted from a few dozen pieces. |
|---|---|
| Annual production capacity | Approximately 50,000 pieces |
| Sample lead time | 3–7 working days |
| Mass production lead time | 8–30 working days, depending on quantity, material and surface treatment |
| Quotation turnaround | 1–2 working days for complete drawings |
| Shipping terms | EXW, FOB, CIF, CNF, DDP, DDU |
| Payment | T/T, PayPal, Western Union |
| Input accepted | 2D drawings, 3D models (STEP, IGES, X_T), or a physical sample for reverse engineering |
Questions about capability
Does Boyang Hardware have a minimum order quantity?
No fixed minimum. Prototypes and small batches are accepted, and repeat production pricing is quoted alongside the prototype price so the cost curve is clear before tooling decisions are made.
What is the largest part you can machine?
It depends on the machine and the axis configuration, and is best confirmed against your drawing. Send the part envelope and the critical features and the correct machine will be specified in the quotation, together with any feature that needs a different process route.
Can you machine and then cast, or cast and then machine?
Yes, both directions happen here. Parts are frequently cast to near-net shape and then finish-machined on the critical features in-house, which keeps the tolerance chain and the schedule under one supplier.
Do you support design for manufacturing review before ordering?
Yes, a DFM review is included with every quotation at no cost. The review looks at wall thickness, tool access, corner radii, datum scheme, and whether the specified tolerance can be held on the specified feature. See the DFM checklist.
How do you handle a drawing change after production has started?
Changes are handled under engineering change control: the revision is confirmed in writing, affected operations are identified, and parts already produced are quarantined until it is decided whether they can be reworked or must be scrapped. See engineering change control.
Send us the drawing
Quotations are returned within 1–2 working days, with a design-for-manufacturing review included at no cost.