In custom manufacturing, the terms precision machining and CNC machining are often used interchangeably. But there are important distinctions that affect quality, cost, and delivery time. This guide explains the difference and helps you choose the right process for your parts.
What Is CNC Machining?
CNC (Computer Numerical Control) machining uses pre-programmed software to control machine tools such as mills, lathes, and routers. CNC machining services can produce parts from metals and plastics with repeatable accuracy, making them ideal for prototyping and production.
What Is Precision Machining?
Precision machining goes beyond standard CNC processes. It involves tighter tolerances (often ±0.005mm or better), advanced metrology equipment, and specialized finishing techniques. A dedicated precision machining company invests in high-end equipment and skilled engineers to deliver precision machined parts with exceptional consistency.
Key Differences
- Tolerances — standard CNC: ±0.05mm; precision machining: ±0.005mm or tighter
- Equipment — precision shops use 5-axis machines, jig grinders, and coordinate measuring machines (CMM)
- Inspection — precision parts undergo 100% dimensional verification
- Cost — high precision machining commands a premium but reduces rework and failures
When Do You Need Precision Machining?
Choose precision machining when your application involves medical devices, aerospace components, mold inserts, or any part where dimensional accuracy directly affects function. Custom machining with precision tolerances is the right choice for complex geometries and critical assemblies.
Partner With a Precision Machining Company
RCH Plastic offers both CNC machining services and precision machining capabilities for plastic and metal components. As an experienced precision machining company, we combine custom machining with rigorous quality control to deliver custom machined parts that meet the most demanding specifications. Contact us for a quote today.