Low Volume Die Casting Production
Cast metal parts from 500 to 5,000 pieces on prototype and bridge dies, without paying for hardened production tooling you may never amortise. Validate the market on real die cast parts, then scale into an H13 die using the same part design and process window.
Free Consultation24h
Rapid Quote
500 pcs
MOQ
2-3 weeks
Tooling Lead Time
10,000 shots
Die Life (Prototype)
Materials
| Grade | Properties | Typical Applications |
|---|---|---|
| Aluminum A380 | Tensile strength 324 MPa, density 2.71 g/cm³, excellent fluidity for thin sections, the most forgiving alloy for a first prototype die | Housings, brackets, covers, handles, first production batches for new products |
| Aluminum A413 | Tensile strength 296 MPa, best castability and pressure tightness among common aluminum die casting alloys, low shrinkage variation | Pump bodies, valve parts, sealed enclosures, low volume runs where leak tightness matters |
| Zinc Alloy Zamak 3 | Tensile strength 283 MPa, density 6.60 g/cm³, fine detail replication, casts reliably in small shots on short runs | Hardware, locks, decorative fittings, small mechanisms, low volume brand parts |
| Zinc Alloy Zamak 5 | Tensile strength 328 MPa, higher hardness and creep resistance than Zamak 3, good for load-bearing small parts | Gearbox covers, tool bodies, brackets, precision hardware in short runs |
| Magnesium AZ91D | Tensile strength 230 MPa, density 1.81 g/cm³, the lightest common die casting alloy, needs conversion coating for corrosion | Portable device frames, drone parts, lightweight brackets in pilot production |
Process Parameters
| Parameter | Standard Range |
|---|---|
| Prototype Die Lead Time | 2 - 3 weeks |
| Prototype Die Life | 1,000 - 10,000 shots |
| Bridge Die Life | 10,000 - 50,000 shots |
| Production Die Life (H13) | 50,000 - 100,000 shots |
| Minimum Order Quantity | 500 pcs |
| Practical Low Volume Band | 500 - 5,000 pcs per release |
| As-Cast Tolerance | ISO 8062-3 CT5 to CT6 |
| Machined Tolerance | ±0.05 mm, ±0.02 mm on request |
| Casting Temperature | 380 - 420°C (zinc), 650 - 720°C (aluminum) |
| Injection Pressure | 200 - 1,500 bar by alloy and part |
| Maximum Part Weight | up to 8 kg (cold chamber) |
| Wall Thickness Range | 0.8 - 5.0 mm |
Surface Finishes
As-Cast with Deburr
Parting line and gate residue removed, edges deburred, surface left at Ra 1.6 to 3.2 μm. The default for low volume runs where the part is functional and hidden inside an assembly, and the lowest cost per piece.
Bead Blasting
Uniform matte texture that removes flow marks and blends gate areas, applied in a tumble or cabinet blast. Gives a consistent cosmetic surface on small batches without the setup cost of a coating line.
Powder Coating
Thermoset film 40 to 80 μm with RAL colour matching, applied after masking threads and bores. A practical way to differentiate colours in a pilot run, since the same casting can carry several finishes without new tooling.
Anodizing (Aluminum)
Type II sulfuric anodize at 5 to 25 μm in clear or dyed finish for aluminum parts, giving corrosion protection and a hard surface. Build is reserved in the drawing where a coated dimension is critical.
Zinc and Nickel Plating
Nickel undercoat plus decorative chrome or matte zinc at 5 to 25 μm for Zamak parts, with blue, black or coloured passivation. Common on hardware and fittings where a bright finish drives the sale.
CNC Machining of Critical Features
Drilling, tapping, milling and boring of features that cannot be cast, held to ±0.05 mm. For low volume parts this is often cheaper than adding die features that only pay back at high volume.
Design for Manufacturing (DFM)
- Choose a prototype die when the annual quantity stays under about 10,000 pieces, since the tooling cost difference outweighs the per-piece saving
- Keep wall thickness between 1.0 and 4.0 mm; thin walls drive scrap rate up sharply on a prototype die with less thermal control
- Design the part so the same geometry runs in both a prototype die and an H13 die, avoiding a second design cycle at scale
- Put tight tolerances on machined features rather than as-cast surfaces, because a prototype die wears faster than production tooling
- Plan a gate position that can be reused in production tooling so the flow pattern and cosmetic result carry over
- Avoid undercuts that need side actions in a prototype die; hand-loaded inserts cost less at 500 pieces
- Allow 0.2 to 0.5 mm machining allowance on faces that may need correction after the first shots
- Specify the finish at the prototype stage, since coating, plating and anodize change the final dimension
- Reserve budget for one die correction after T1, which is normal on a first tool and cheaper than accepting a compromise
- Upload STEP or IGES files and get a free DFM report within 24h covering die type, cavity count, gate and volume path
Tooling & Capacity
| Type | Lead Time | Suitable For |
|---|---|---|
| Prototype Die (Soft, Single Cavity) | 2 - 3 weeks | 500 to 5,000 pcs, market validation, design freeze, first customer deliveries |
| Bridge Die | 3 - 5 weeks | 5,000 to 50,000 pcs, scaling while demand is still uncertain |
| Production Die (H13) | 4 - 6 weeks | 50,000+ pcs, stable annual volume with amortised tooling |
| Family or Multi-Cavity Die | 6 - 8 weeks | Several low volume parts sharing one die base to cut tooling cost per part |
Quality Assurance
- Incoming alloy verified with mill certificate, grade and heat number recorded per lot
- EN 10204 3.1 material certificates are issued per batch on request for cast parts
- T1 sample measurement and report before the first production run is released
- X-ray porosity check on critical sections of the first shots from a new die
- CMM dimensional report on the first article, measured against the 3D model
- Cosmetic inspection against an approved sample under defined lighting
- Machined features checked with gauges and CMM where tolerances are called out
- Each low-volume lot ships with a dimensional report and Certificate of Origin
- Independent SGS, Bureau Veritas or TUV inspection can be arranged on request for low-volume cast parts
- Die maintenance record kept per tool so shot count and repairs stay traceable
Applications
- Startups validating a first metal production batch
- Bridge production that sits between prototype and full mass run
- Niche and aftermarket components with limited demand
- Spare and service parts for installed equipment
- Customised variants in small colour or configuration runs
- Pre-launch market testing in real production material
- Replacement of discontinued castings at low annual volume
- Pilot builds for industrial and automation projects
- Seasonal or promotional hardware with short life cycles
Why Choose FHY Precision
Prototype dies from 2 to 3 weeks, so a first batch lands while the market window is open
Tooling cost matched to volume, instead of paying for 100,000-shot tooling to make 800 parts
The same part design scales into an H13 die, so the approval you give today stays valid at volume
MOQ 500 pcs keeps the first order small enough to test demand without a warehouse commitment
Integrated CNC machining for tight features, so low volume does not mean loose tolerances
Die ownership stays with you, and tooling can be transferred if you later move production
Quality is documented and controlled internally, and third-party inspection with EN 10204 3.1 certificates is offered on request
You deal with the China plant directly: factory-direct pricing, no trading layer
FAQ
1. What is the minimum order quantity for low volume die casting?
MOQ is 500 pieces. That number comes from the die setup and trial cost rather than from the machine, so 500 is the practical floor for a die cast part. If you need fewer than 500, sand casting or CNC machining from billet is usually cheaper than building a die, and we will say so rather than sell a die you do not need.
2. How much does a prototype die cost compared with a production die?
A single-cavity prototype die typically costs 30 to 50 percent of an H13 production die for the same part, because it uses softer steel, fewer cavities and simpler cooling. The trade-off is die life: 1,000 to 10,000 shots versus 50,000 to 100,000. Below roughly 10,000 pieces the prototype die almost always wins on total cost.
3. What is a bridge die and when should we use one?
A bridge die sits between prototype and production tooling: harder than a soft die, longer lived at 10,000 to 50,000 shots, and cheaper than a full H13 die. It suits the stage where demand is proven but not yet stable, typically 5,000 to 50,000 pieces. It avoids buying production tooling for a volume you are still estimating.
4. When does it make sense to move from a prototype die to production tooling?
When annual volume is reliably above about 10,000 pieces, or when the per-piece saving of a multi-cavity die pays back the tooling difference within 12 to 18 months. We calculate that break-even with your forecast and show the number, so the decision is based on arithmetic rather than on a supplier pushing for a bigger tool.
5. Can the prototype die cost be credited against production tooling later?
That depends on the die design. Where the prototype tool shares its die base, ejector system and gate layout with the production tool, part of the cost can carry over and we credit it. Where the designs diverge, the prototype die stays a separate investment. The quotation states which case applies before you commit.
6. How long does a low volume die casting order take?
Prototype die build takes 2 to 3 weeks, T1 samples follow within about a week of the trial, and the first production batch ships 2 to 4 weeks after sample approval depending on finishing. A total of 5 to 8 weeks from drawing release to delivered parts is typical for 500 to 2,000 pieces with powder coating.
7. Is the price per piece much higher at low volume?
Higher than a 50,000 piece run, mainly because setup, die amortisation and inspection spread across fewer parts. At 500 to 5,000 pieces the per-piece price typically runs 20 to 60 percent above a high volume price for the same geometry, depending on cavity count and finishing. The die cost is quoted separately so you can see both numbers.
8. Do you provide samples before the production batch?
Yes. We send T1 samples from the first shots for dimensional and cosmetic approval, with a measurement report. If the samples need a die correction, we make it and re-run T1 before any production quantity is cast. Most customers approve within one round, and no production batch is cast before you sign off the sample.
9. Can you change the design after the prototype die is cut?
Minor changes such as adding a boss, moving a hole or adjusting a rib are usually possible with die inserts and take 1 to 2 weeks. Major changes to wall thickness, parting line or overall size can require a new die. The DFM report aims to catch those issues before cutting, which is why the design review matters more at low volume where there is no second chance to amortise a mistake.
10. Which alloy should we choose for a first low volume run?
A380 for aluminum is the standard choice: cheap, easy to cast and forgiving of thin sections. Choose A413 when pressure tightness matters, Zamak 3 for fine detail on small parts, and Zamak 5 where a bit more strength is needed. Magnesium suits weight-critical parts but adds coating steps, so it is rarely the cheapest first choice.
11. What are the alternatives to die casting at low volume?
Sand casting, investment casting and CNC machining from billet all work below a few hundred pieces, with higher per-piece cost but no die investment. Between about 500 and 10,000 pieces die casting generally wins once finishing and machining are included, because the casting arrives close to final shape. We quote the comparison when the volume is borderline.
12. Do we own the tooling?
Yes. Tooling paid for by the customer belongs to the customer. It stays at our plant for production but can be transferred, and we provide the die drawing and maintenance record if you move it. Die storage is free for two years, after which a small storage fee applies unless production continues.
13. How do you keep quality consistent across a small batch?
Every lot is cast on the same die with recorded process parameters, and the first article from each run is measured against the approved sample. Because low volume runs usually come from a single cavity, part-to-part variation is smaller than on a multi-cavity die. Each shipment carries a dimensional report and material certificate.
14. Can you handle finishing and machining for a low volume order?
Yes. Powder coating, anodizing, plating, blasting and CNC machining are quoted together with the casting, so one purchase order covers the finished part. Combining operations matters more at low volume, because splitting across suppliers multiplies freight, minimum charges and coordination effort for a batch that may only be 800 pieces.
15. What if demand grows faster than expected?
A prototype die covers 1,000 to 10,000 shots, and a bridge die covers 10,000 to 50,000, so there is room to absorb a demand spike before production tooling is needed. We monitor shot count and warn you when the die approaches 80 percent of its expected life, which gives 4 to 6 weeks to plan the next tool.
16. What do you need to quote a low volume die casting part?
A STEP or IGES model, a 2D drawing with tolerances and finish requirements, the alloy, expected annual quantity and first order quantity, and the target market launch date. With those we return a quote in 24 hours showing die cost, piece price at your volume, tooling lead time and the volume at which production tooling becomes cheaper.