The calculation of CNC machining service fees is mainly based on four core factors: material cost, machining difficulty, production quantity, and surface treatment. A final quote is formed after comprehensive evaluation.
Four Core Pricing Factors
Material Costs
Materials are the basic expenditure and directly affect the total cost. Commonly used materials include:
Aluminum alloys: Moderate cost, easy to machine, suitable for most structural parts.
Stainless steel/titanium alloys: High strength but slow machining, high tool wear, and higher price.
Engineering plastics (such as PEEK, POM): Suitable for the medical or electronics industries, but the risk of thermal deformation needs to be controlled.
Machining Difficulty (Work Time Determines Price)
The more complex the structure, the longer the processing time and the higher the cost:
Simple square shells with few holes → Fast machining, low cost.
Deep cavities, thin walls, irregular curved surfaces, or multi-faceted machining → Requires five-axis linkage, doubling the machining time and significantly increasing the unit price.
Strict tolerance requirements (e.g., ±0.01mm) and high surface finish → increase finishing and inspection time.
Production Quantity (Batch size affects unit price)
Prototype/Small Batch (1-dozens of pieces): Programming and machine setup costs cannot be amortized, resulting in the highest unit price.
Medium-to-Large Batch (hundreds of pieces or more): Specialized fixtures and assembly line operations can be used, significantly reducing unit cost.
Surface Treatment and Additional Requirements: Post-processing items directly increase labor and time costs:
Common Processes: Anodizing, sandblasting, painting, wire drawing, screen printing, laser engraving, etc.
Special Requirements: Full-size inspection, CMM coordinate measuring machine report, waterproof structure, scratch-free surface, etc., also affect the total price.
How to Get an Accurate Quote Quickly?
To improve efficiency, please prepare the following materials in advance:
3D Drawings (STEP/IGS format): Facilitates simulation of the machining path.
2D Drawings (PDF/DWG): Marks dimensions, tolerances, and technical requirements.
Clearly define the materials, quantities, post-processing requirements, and delivery timeline.
The more complete the information, the faster the manufacturer can provide an accurate quote and ensure delivery quality.
