Core influencing factors of CNC cost
The price of precision machining of non-standard parts can not be generalized, because it is highly dependent on specific design requirements, materials, process complexity and other factors, the price of a single piece may range from hundreds of dollars to tens of thousands of dollars. The following detailed analysis of the core factors affecting the machining cost of CNC parts, to help you more accurately assess the cost:
Main cost influencing factors
Material cost
Material type: The price of high-strength materials such as titanium alloy and medical stainless steel is much higher than that of aluminum or ordinary plastics (for example, the unit price of titanium alloy may be 5-10 times that of aluminum alloy).
Material utilization: Complex parts may increase raw material costs due to high scrap rates (such as thin-walled structures leading to high material losses).
Processing time
Programming and debugging: Complex geometries require longer programming and trial cutting times, and this cost accounts for a significant proportion of small batch production of single pieces.
Cutting efficiency: Deep hole machining, small features (such as aperture below 0.5mm) will reduce the feed speed and extend the working time.
Part complexity
Multi-axis demand: Five-axis CNC machining costs 30%-50% higher than three-axis, but can reduce the number of clamping times.
Special process: surface, chamfer, fine texture, etc. need special tools or sequential processing, increasing costs.
Lot size
Single piece and small batch: A single piece needs to share the equipment start-up cost, and the unit price may be 3-5 times higher than the 100 piece batch.
Economy volume: Most CNC processing plants offer a step-quote discount for orders of 50 pieces or more.
Tolerances and surface treatments
Precision tolerances (such as IT7 and above) : require multiple finishing and testing, the cost may increase by 20%-40%.
Post-treatment process: Medical parts often need electrolytic polishing (EP) or mirror polishing (Ra≤0.2μm), the cost can reach 15%-30% of the cost of raw materials.
Practical strategies to reduce costs
Design optimization:
Avoid excessive precision requirements.
Features that can be machined with standard tools.
Process collaboration:
Combined machining (multiple parts combined typesetting) improves material utilization.
Multi-task machine tools (turn-milling complex) are selected to reduce the number of clamping times.
Batch planning:
Medical parts may consider "minimum feasible lot size" to balance inventory and unit price.
Long-term cooperation with suppliers to lock in preferential rates.
The essence of the price of precision machining of non-standard parts is the comprehensive embodiment of technical difficulty and resource investment. Through rational design, process optimization and supply chain collaboration, costs can be significantly reduced. It is recommended that you can communicate with us at the drawing stage to achieve the best cost performance.
Try contacting Dahong immediately, all information and uploads are secure and confidential.
