CNC machining, or Computer Numerical Control machining, is a subtractive manufacturing process that uses computerized controls and machine tools to remove layers of material from a stock piece, producing a custom-designed part. This technology is widely utilized across industries for its precision, efficiency, and ability to create complex geometries with tight tolerances.
Our CNC machining services offer a range of capabilities to meet diverse manufacturing needs. Below are the detailed parameters presented in lists and tables for clarity.
| Machine Type | Max Part Size (mm) | Tolerance (mm) | Spindle Speed (RPM) |
|---|---|---|---|
| 3-Axis Milling | 500 x 400 x 300 | ±0.025 | Up to 12,000 |
| 5-Axis Milling | 600 x 500 x 400 | ±0.015 | Up to 20,000 |
| CNC Turning | Ø300 x 500 | ±0.020 | Up to 3,500 |
| Swiss-Type Lathe | Ø32 x 300 | ±0.010 | Up to 10,000 |
| Volume Range | Typical Lead Time | Setup Cost |
|---|---|---|
| Prototyping (1-10 units) | 3-7 days | Low to Moderate |
| Low Volume (11-100 units) | 1-2 weeks | Moderate |
| Medium Volume (101-1,000 units) | 2-4 weeks | High |
| High Volume (1,001+ units) | 4+ weeks | Negotiable |
What files do I need to provide for a CNC machining quote?
You should provide a 3D CAD file in formats like STEP, IGES, or SLDPRT, along with a 2D drawing in PDF or DWG format that includes critical dimensions, tolerances, and material specifications.
How accurate is CNC machining?
CNC machining can achieve high precision with tolerances as tight as ±0.005 mm depending on the machine, material, and part geometry. Standard tolerances are typically around ±0.025 mm for most applications.
What materials are best for CNC machining?
Common choices include aluminum for its lightweight and machinability, stainless steel for strength and corrosion resistance, and plastics like ABS for cost-effectiveness. Material selection depends on application requirements such as strength, weight, and environment.
Can CNC machining produce complex parts?
Yes, CNC machining is capable of producing highly complex geometries, including undercuts, deep cavities, and intricate features, especially with multi-axis machines that allow for simultaneous movement in multiple directions.
What is the difference between 3-axis and 5-axis CNC machining?
3-axis machining moves the cutting tool in three linear directions (X, Y, Z), suitable for simpler parts. 5-axis machining adds two rotational axes, allowing the tool to approach the part from any direction, which is ideal for complex shapes and reduces setup time.
How do I reduce costs in CNC machining?
Costs can be minimized by optimizing part design for manufacturability, such as avoiding sharp internal corners, using standard tolerances, selecting readily available materials, and considering larger production volumes to amortize setup costs.
What surface finishes are available after machining?
Options include as-machined, bead blasting, anodizing (for aluminum), powder coating, plating, and polishing. The choice depends on aesthetic requirements, corrosion resistance, and functional needs like reduced friction.
Is CNC machining suitable for prototyping?
Absolutely, CNC machining is excellent for prototyping due to its rapid turnaround, high accuracy, and ability to use production-grade materials, allowing for functional testing and design validation before full-scale production.
How does lead time vary with part complexity?
Lead time increases with part complexity due to longer programming, setup, and machining times. Simple parts might take a few days, while highly complex parts with tight tolerances and multiple operations can take several weeks.
What industries commonly use CNC machining?
CNC machining is prevalent in aerospace, automotive, medical, electronics, and consumer goods industries for producing precision components like engine parts, surgical instruments, enclosures, and custom fittings.
