What we can produce
Casting, machining, finishing and inspection under one roof
The tables below are the ones engineers ask for first. If your part falls outside these ranges, send the drawing anyway — in most cases we can quote a route, or tell you honestly that we are the wrong supplier.
Everything on this page as a one-page capability sheet
Tolerance tables, weight ranges and the RFQ checklist in a single PDF you can forward internally or send with your enquiry.
Step 01
Silica-sol investment casting
Also called lost-wax casting. A wax pattern is coated in ceramic slurry and stucco to build a shell, the wax is melted out, the shell is fired, and molten metal is poured in. The result is a one-piece component with fine detail and no parting line — useful where welding or assembly would otherwise be needed.
Process capabilities
| Parameter | Range |
|---|---|
| Unit weight, investment casting | 10 g – 50 kg per piece |
| Unit weight, lost foam | 20 – 2,000 kg per piece |
| Casting dimensional tolerance | ±0.1 mm, by process |
| Materials | 300/400-series stainless, low-alloy, high-temperature alloy |
| Shell system | Silica sol binder |
| Casting capacity | 200 t per month |
| Heat treatment | Normalising, quenching, tempering as required |
| Finishing | Shot blasting, coating, galvanising |
Why choose investment casting
- Complex geometry in one piece — internal channels, undercuts and deep pockets that sand casting cannot form.
- No parting line or draft limitation on most faces, so surfaces come out cleaner.
- Better as-cast finish than sand casting, reducing machining allowance and cycle time.
- Economical at low to mid volume — tooling cost is far lower than forging or die casting.
- Alloy flexibility — including grades that are difficult to forge or weld.
Casting process video
Wax injection through to knock-out, filmed on our line.
Production route
1
Wax pattern
Injection into a machined aluminium die, then assembly onto the runner tree.
2
Shell building
Repeated slurry dip and stucco coats to build a ceramic shell of controlled thickness.
3
Dewax & fire
Autoclave dewaxing, then firing to burn out residue and sinter the shell.
4
Melt & pour
Induction melting with spectro verification, poured and recorded by heat number.
Step 02
CNC machining
Castings are only half a component. We machine our own castings — and bar stock — to drawing tolerances, using fixtures designed alongside the casting so the datum is consistent from first article onward.
Turning capacity
| Parameter | Range |
|---|---|
| Machines | Imported CNC lathes |
| Typical work | Shafts, bushes, rings and turned profiles |
| Machined features | Turned diameters, bores, grooves and face work |
| Tolerances and finish | Quoted against your drawing before tooling starts |
Milling & drilling capacity
| Parameter | Range |
|---|---|
| Machines | Machining centres; milling and EDM for tooling |
| Typical work | Faces, bores, slots and drilled hole patterns |
| Threads | Metric and imperial threads by tap or milled thread |
| Tooling | Wax dies and fixtures made in-house |
| Tolerances and finish | Quoted against your drawing before tooling starts |
Fixtures designed with the casting
Fixture design is reviewed together with the casting layout, so the machining datum is the one the foundry actually controls. This is the most common cause of first-article rejections elsewhere, and we remove it up front.
Process capability on critical features
Where your drawing marks a critical characteristic, we report measured results from production data rather than a single sample measurement.
Trial cut before series
For complex parts we complete a trial cut on a sample casting and submit results before committing the production programme. If the process needs adjusting, you find out then — not in your warehouse.
Step 03
Heat treatment & surface finishing
Mechanical properties and corrosion resistance are decided here. Specify the standard and we will process to it and issue the certificates with the shipment.
| Process | Typical application | Reference standard |
|---|---|---|
| Normalising | Carbon and low-alloy steel, grain refinement before machining | Customer specification |
| Hardening & tempering | 400-series martensitic grades (410, 420), wear and linkage parts | Customer specification |
| Solution annealing | Austenitic 300-series grades, corrosion resistance and softness | Customer specification |
| Stress relieving | Dimensional stability before final machining | Customer specification |
| Finish | Where it is used | Standard / note |
|---|---|---|
| Shot blasting | Shell removal and surface cleaning after knockout | Media grade to your requirement |
| Coating (paint) | Equipment housings, colour-coded parts | Applied to the specification on your drawing |
| Galvanising | Corrosion protection for steel components | Applied to the specification on your drawing |
Finishing operations that are not carried out in-house are performed by audited suppliers, with certificates retained against your order reference.
Step 04
Inspection & non-destructive testing
Every order ships with documentation. Which tests are applied depends on your drawing and end use — tell us what your own customer requires and we will match it.
| Check | Method | Basis | Report issued |
|---|---|---|---|
| Chemical composition | Optical emission spectrometry | In-house, every heat | Material certificate per heat number |
| Visual & workmanship | Against approved sample and drawing notes | In-house, every lot | Visual inspection record |
| Dimensional | Micrometers, callipers, bore gauges and hand tools | In-house | First article report / lot report |
| Pressure integrity | Hydrostatic pressure test | In-house — valves & pipe fittings | Pressure test certificate |
| Internal defects | Radiographic testing (X-ray) | On project basis | RT report with films or digital images |
| Surface defects | Dye penetrant (PT), magnetic particle (MT) | On project basis | PT / MT report |
| Hardness | Brinell, Rockwell or Leeb | On project basis | Hardness certificate |
| Material test certificates | In-house laboratory or third party | On project basis | MTC with heat number traceability |
First article inspection
Ballooned drawing with measured values against every dimension, submitted for your written approval before series production.
Traceability
Melt record, heat treatment record and inspection results retrievable by heat number for the life of the programme.
Third-party inspection
SGS, BV, TÜV or your nominated inspector are welcome on site. We will schedule access and provide the test pieces.
Beyond the part
Value-added operations
Work that would otherwise land on your receiving dock as extra handling, extra suppliers and extra paperwork.
Sub-assembly
Pressed-in bushes, bearings, seals, studs and fasteners fitted before shipment.
Kitting & sets
Multiple part numbers packed as a matched set with a single part number and label.
Laser marking & labelling
Part numbers, heat numbers, batch codes, barcodes and your own brand marking.
Export packaging
VCI film, desiccant, foam separation, custom cartons, pallets and container loading plans.
Drawings & DFM support
We review your drawing for castability and machinability and propose changes with the cost impact stated.
Logistics coordination
EXW, FOB Qingdao, CIF and DDP with the full export document set prepared for clearance.
Does your part fit these ranges?
Send the drawing, even if it does not. You will get a clear answer either way — including a route we would recommend if we are not the right fit.