JLCCNC Blog

CNC Machines & Equipment

5-Axis CNC Machining: Why Is It Needed for Complex Parts?

Key Takeaways 3-axis CNC machining is often a practical and cost-effective choice when all critical features can be reached using a small number of straightforward setups, with the tool orientation fixed relative to the workpiece during each setup. A 5-axis machine can improve access to angled or multi-sided features and reduce re-clamping. These benefits can often be achieved with 3+2 positioning, without simultaneous 5-axis cutting. 3+2 machining uses two rotary axes to position the workpiece or cut......

Sep 16, 2026

CNC Machining Fundamentals

Sheet Metal vs CNC Machining: A Guide to Choosing the Right Method for Your Metal Parts

Sheet Metal vs CNC Machining: How to Choose the Right Method for Your Metal Parts Quick Answer: Choose sheet metal for uniform-thickness enclosures, panels, and formed brackets when bends and production volume support lower unit cost. Choose CNC machining for variable wall thickness, precision bores, tight feature relationships, and complex 3D geometry. Use a hybrid design when a formed structure needs precision-machined interfaces. A quote comes back for a bracket, and it's priced as a CNC part — mac......

Sep 15, 2026

Surface Finishing Processes

Optimizing Manufacturing Efficiency: A Guide to Computerized Numerical Control (CNC) Machining Surface Finishes

CNC Surface Finishes: Types, Costs, and How to Choose Quick Answer: Choose an as-machined finish when cost and dimensional stability matter most. Use bead blasting or brushing for a uniform cosmetic appearance, anodizing for aluminum corrosion resistance, hard anodizing for wear, and laser marking or UV printing for identification. Confirm material, tolerance, color, masking, and end-use environment before quoting. A CNC-machined part comes off the machine functional but rarely finished — tool marks, ......

Sep 15, 2026

Surface Finishing Processes

Anodizing vs. Hard Anodizing: The Differences in Surface Treatment Techniques

Anodizing vs. Hard Anodizing: The Differences in Surface Treatment Techniques Quick Answer: Choose Type II anodizing when corrosion resistance, color, and cosmetic appearance are the main requirements. Choose Type III hard anodizing when the part needs greater wear resistance and the coating thickness can be accommodated in the fit and tolerance plan. Confirm alloy, coating thickness, color, sealing, and critical dimensions before release. An aluminum bracket for an outdoor enclosure and a hydraulic c......

Sep 15, 2026

CNC Machining Fundamentals

How Precise Is CNC Machining Compared To Other Manufacturing Methods?

How Precise Is CNC Machining Compared to Other Manufacturing Methods? Quick Answer: CNC machining generally holds tighter tolerances than forming, casting, and most additive processes, because it removes material directly rather than relying on shrinkage, springback, or layer deposition. But "how precise" depends on the specific process variant, material, geometry, and inspection method — there's no single number that applies across an entire process category. A part spec calls for a tolerance of ±0.0......

Sep 15, 2026

CNC Machining Fundamentals

CNC Milling vs. CNC Turning: Which is Better?

CNC Milling vs. CNC Turning: Which Process Fits Your Part? Quick Answer: Choose CNC milling for prismatic, flat, pocketed, and complex 3D parts. Choose CNC turning for parts whose primary geometry is cylindrical or rotationally symmetric. Use mill-turn or secondary milling when a turned part also needs flats, keyways, cross-holes, or other non-round features. A shaft and a bracket can come from the same material, hold similar tolerances, and still need completely different machines to make — not becau......

Sep 15, 2026