CNC Machining Cost Too High? Forged Blanks + CNC From One Factory
Machining every part from solid bar turns most of the metal into chips and most of the cycle into roughing. We forge aluminium close to final shape on 300–2,500 T presses, then CNC only the critical features to ±0.01 mm, including on 5-axis CNC – less material, less machine time, stronger parts.
- ±0.01 mm
- 99% first-pass yield
- ISO 9001:2015
- DFM feedback in 3 working days
What drives CNC machining cost
- Material – you pay for the whole bar, not the finished part
- Machine time – roughing out pockets and profiles takes most of the cycle
- Tooling wear – more metal removed, more cutters used
- Set-ups – complex shapes need extra fixtures and operations
- Volume – billet cost per part barely falls as quantity rises
How a forged blank cuts it
| Cost driver | CNC from billet | Forged blank + CNC |
|---|---|---|
| Material bought per part | Full bar or plate | Blank close to final shape |
| Swarf / chips | Large share on complex parts | Little – finishing allowance only |
| Machine time | Roughing + finishing | Finishing passes only |
| Grain flow | Cut through | Follows the part contour – better fatigue and impact performance |
| Unit cost as volume grows | Roughly flat | Falls once die cost is spread |
| Up-front cost | None | Forging die |
| First samples | 3–5 days | Tooling 20–25 days, samples ~30 days |
| Tolerance on finished features | ±0.01 mm | ±0.01 mm |
| Typical order size | From 1 pc | MOQ 1,000–5,000 pcs |
Is your part a good fit?
Good fit: brackets, arms, clamps, cranks, housings, joints · annual volume in the thousands · load-bearing or fatigue-critical · heavy roughing from solid today
Stay with billet: prototypes and small batches · designs still changing · simple plate parts with little material removed
Best of both: prototype on CNC in 3–5 days, freeze the design, move to forged blanks for production.
Honest fit check
| Factor | What it means |
|---|---|
| Annual volume | Higher volume = faster die payback |
| Geometry | 3-D structural shapes benefit most; flat plates rarely justify a die |
| Strength needs | Load-bearing / fatigue parts gain from grain flow |
| Current pain | Heavy roughing or long spindle hours = biggest savings |
| Not a fit | R&D prototypes and one-offs – machine them from bar: see CNC prototyping and aluminum CNC machining |
For CNC shops
Run a machining business without a forging line? We supply forged blanks to your drawings – you keep the finishing and the customer. Ask about blank supply
What to send
STEP, STP, DWG, DXF or PDF – the same file your CNC shop gets. NDA on request. You get the right to use your forging tooling; tooling design rights remain with XPF. Each batch can ship with a material certificate (mill cert) and a finished-part inspection report, and we can provide a full DFM report. Critical features are CMM inspected; machined surfaces to Ra 0.8.
Other ways to lower CNC cost (design for cost)
- Relax tolerances on non-functional features; keep ±0.01 mm where it matters
- Avoid deep narrow pockets and small internal radii
- Standardise hole sizes and threads
- Reduce set-ups by keeping features on as few faces as possible
- At volume, change the blank – forging removes the most machine time
(Our DFM review flags these within 3 working days.)
Forge, then finish – our process
- DFM review – 3 working days
- Die design & tooling – 20–25 days
- Forging – 300–2,500 T hot, 600 T cold, 2,500 T liquid die forging
- Heat treatment
- CNC machining (incl. 5-axis) & special drilling – ±0.01 mm
- Finishing – anodising and other finishes available
- Inspection – 99% first-pass yield, ISO 9001:2015
20+ years of aluminium forging expertise · Factory in Guangming, Shenzhen
Send your machined part drawing – we’ll quote the forged route.
CNC machining cost – common questions
How much does CNC machining cost?
It depends on material, machine time, set-ups and quantity. For aluminium parts in volume, material removed and spindle time are usually the largest items.
Why is CNC machining so expensive?
When a part is cut from solid bar, you pay for metal that becomes chips and for the spindle hours needed to remove it – on every single part.
Is CNC machining expensive for high-volume parts?
Billet cost per part barely falls with quantity, because each part still needs full roughing. At thousands of pieces a year, a forged blank usually changes the cost curve.
How is CNC machining cost calculated?
Roughly: material + machine time × hourly rate + set-ups and fixtures + finishing + inspection, spread over the batch. Machine time is driven by how much metal is removed.
How can I reduce CNC machining costs?
Relax tolerances on non-functional features, avoid deep narrow pockets, standardise holes and threads, and reduce set-ups. At volume, start from a forged near-net-shape blank instead of solid bar.
What is a forged blank?
A part forged close to its final shape, leaving only a small allowance on critical faces and bores for CNC finishing.
Is forging cheaper than machining?
For prototypes and small batches, no – a die is needed. Once annual volume covers the die, forged blank + CNC typically costs less per part, and the gap grows with volume. We quote both routes on your drawing.
Will my tolerances survive the switch to forging?
Yes. Critical features are CNC-machined after forging to ±0.01 mm, so you keep CNC accuracy where it matters.
What is the minimum order quantity?
Pure CNC machining from 1 pc. Forged blank + CNC: MOQ 1,000–5,000 pcs, depending on the part.
How long do samples take?
Pure CNC samples: 3–5 days. Forged parts: tooling 20–25 days, samples in about 30 days. DFM feedback on your drawing within 3 working days.