Why CNC Parts Fail in Real Applications — And How Custom Machining Fixes It

Many buyers assume that a CNC part fails because of poor machining accuracy.
In reality, most failures happen after installation, not on the machine.

Common real-world failure reasons:

• Improper material selection for load or temperature
  
  

• Tolerance defined without considering assembly conditions
  
  

• Sharp internal corners causing stress concentration
  
  

• Surface finish not matching the working environment
  
  

How custom CNC machining solves these issues:

Instead of blindly following drawings, experienced CNC manufacturers analyze:

• Load direction and working frequency
  
  

• Contact surfaces and friction points
  
  

• Thermal expansion and deformation risks
  
  

For example, a part machined to ±0.01 mm tolerance may still fail if:

• The mating part expands under heat
  
  

• The assembly requires slight elastic deformation
  
  

• Surface roughness increases wear faster than expected
  
  

True CNC customization is not about “cutting metal”, but about making parts survive real use.