Custom CNC Machining Services
Precision CNC Milling & Turning for Metal and Plastic Parts
Rapid prototypes and production parts manufactured to your specifications. From 1 prototype to 100,000+ production parts with consistent quality, engineering support, and worldwide delivery.
Trusted Manufacturing Partner for Industry Leaders
Why Engineers and Buyers Choose LK Tools
We bridge the gap between rapid prototyping and reliable mass production with engineering excellence.
Precision Manufacturing
Tolerance up to ±0.005 mm. Advanced CNC equipment ensures repeatable accuracy across all production runs.
Fast Turnaround
Prototype parts delivered in as fast as 3 days. Scalable production orders fulfilled reliably in weeks.
No Minimum Order
From a single prototype to validate design, to large-scale mass production without rigid MOQ constraints.
Free Engineering Review
Expert Design for Manufacturability (DFM) feedback included with every quote before production begins.
Quality Documentation
Comprehensive reporting including FAI, CMM Reports, Material Certifications, PPAP, and CoC available.
US Office + China Factory
Benefit from factory-direct pricing while maintaining local, native-English communication and support.
CNC Machining Capabilities
CNC Milling Services
- 3-Axis CNC Milling
- 4-Axis CNC Milling
- 5-Axis CNC Milling
- High-Speed Milling
- Complex Geometry Machining
CNC Turning Services
- Precision CNC Turning
- Live Tooling Turning
- Multi-Axis Turning
- Swiss Machining
Secondary Operations
Precision Parts Gallery
Examples of our custom machined components across various industries.
Aluminum CNC Parts
Material: 6061-T6 Aluminum
Process: 5-Axis Milling
Tolerance: ±0.01 mm
Industry: Aerospace
Stainless Steel CNC Parts
Material: 316L Stainless Steel
Process: CNC Turning & Milling
Tolerance: ±0.005 mm
Industry: Medical Devices
Brass CNC Parts
Material: C360 Brass
Process: Swiss Machining
Tolerance: ±0.01 mm
Industry: Electronics
Plastic CNC Parts
Material: PEEK
Process: 3-Axis Milling
Tolerance: ±0.05 mm
Industry: Semiconductor
5-Axis CNC Parts
Material: Titanium Grade 5
Process: 5-Axis Milling
Tolerance: ±0.008 mm
Industry: Defense
Precision Turned Parts
Material: 4140 Carbon Steel
Process: CNC Turning
Tolerance: ±0.01 mm
Industry: Automotive
From Concept to Production
A single manufacturing partner throughout your entire product lifecycle.
Engineering Prototype
1–10 pcs
Validate design and material selection quickly.
Functional Prototype
10–100 pcs
Testing for form, fit, and function.
Low Volume Production
100–1,000 pcs
Bridge tooling and initial market launch.
Mass Production
1,000–100,000+ pcs
Optimized manufacturing for scale and cost.
Available CNC Materials
Over 50+ engineering-grade metals and plastics in stock.
Aluminum
- 6061
- 6063
- 7075
- 5052
- 2024
- 6082
- MIC6
Stainless Steel
- 303
- 304
- 316
- 316L
- 17-4PH
- 420
- 440C
Carbon Steel
- 1018
- 1045
- 4140
- A36
- 1215
- 8620
Brass & Copper
- C360 Brass
- C260 Brass
- C110 Copper
- Bronze
Titanium
- Grade 2
- Grade 5
- Ti-6Al-4V
Plastics
- ABS
- PC
- PEEK
- POM (Delrin)
- PTFE
- Nylon
- UHMW
- ULTEM
- HDPE
- PVC
Material Selection Guide
| Material | Strength | Weight | Corrosion Resistance | Machinability | Cost | Typical Applications |
|---|---|---|---|---|---|---|
| 6061 Aluminum | Medium | Low | Good | Excellent | $ | General purpose, brackets, enclosures |
| 7075 Aluminum | High | Low | Average | Good | $$ | Aerospace, high-stress parts |
| 304 Stainless Steel | High | High | Excellent | Average | $$ | Medical, food processing equipment |
| 316 Stainless Steel | High | High | Superior | Average | $$$ | Marine, chemical environments |
| Titanium Grade 5 | Very High | Medium | Superior | Poor | $$$$ | Aerospace, medical implants |
| ABS | Low | Very Low | Good | Excellent | $ | Prototyping, consumer goods |
| POM (Delrin) | Medium | Very Low | Good | Excellent | $$ | Gears, bearings, precision parts |
| PEEK | High | Very Low | Excellent | Average | $$$$ | High-temp applications, aerospace |
Surface Finishing Options
| Finish | Appearance | Corrosion Resistance | Wear Resistance | Cost | Applications |
|---|---|---|---|---|---|
| As Machined | Visible tool marks | Low | Low | Included | Internal components |
| Anodizing (Type II) | Matte to shiny, colored | Good | Medium | $ | Aluminum enclosures, decorative |
| Hard Anodizing (Type III) | Dark gray/black, matte | Excellent | High | $$ | Wear surfaces, military, aerospace |
| Electroless Nickel | Silver, uniform | Excellent | High | $$$ | Steel/brass parts, corrosion protection |
| Passivation | Clean, unaltered | Excellent | Low | $ | Stainless steel medical/food parts |
Engineering Tolerances
We manufacture to standard and precision tolerances based on your drawing requirements.
| Feature | Standard Tolerance | Precision Tolerance |
|---|---|---|
| Linear Dimensions | ±0.125 mm (±0.005") | ±0.005 mm (±0.0002") |
| Hole Diameter | ±0.05 mm | ±0.005 mm |
| Position | ±0.1 mm | ±0.01 mm |
| Flatness | 0.05 mm / 100mm | 0.01 mm / 100mm |
| Concentricity | 0.05 mm | 0.01 mm |
| Surface Roughness | Ra 3.2 μm (125 μin) | Ra 0.4 μm (16 μin) |
| GD&T Capability | Standard Y14.5 | Full Profile & Runout |
How Much Does CNC Machining Cost?
Machining costs are driven by machine time, material costs, and setup complexity. Key factors include:
- Material: Raw material cost and machinability index.
- Complexity: 3-axis vs 5-axis setups, deep pockets, thin walls.
- Tolerance: Tighter tolerances require slower speeds and more inspection.
- Quantity: Higher volumes amortize setup costs significantly.
- Surface Finish & Inspection: Additional processing and reporting add cost.
Typical Lead Times
Prototype
1 - 10 parts
Low Volume
10 - 100 parts
Production
100+ parts
Emergency Service
Expedited manufacturing
Ready to Get a Quote?
Upload Your CAD Files Today. Receive Engineering Feedback Within 24 Hours.
Free Design for Manufacturability (DFM) Review
Every RFQ receives a comprehensive engineering review to identify cost reduction opportunities and ensure manufacturability. We review:
Rigorous Quality Control
ISO 9001 certified processes ensuring every part meets your exact specifications.
Quality Assurance Process
- 1. Incoming Material Inspection
- 2. First Article Inspection (FAI)
- 3. In-Process SPC Monitoring
- 4. 100% Visual Inspection
- 5. Final CMM Measurement
- 6. Traceability Management
Inspection Equipment
Including: CMM, Height Gauges, Micrometers, Hardness Testers, Thread Gauges.
Available Documentation
- FAI Report
- CMM Inspection Report
- Material Certification
- PPAP Level 1-3
- CoC, RoHS, REACH
Industries We Serve
Common Applications
Engineering Case Studies
Complex Hydraulic Manifold
Material: 7075-T6 Aluminum
Tolerance: ±0.005 mm
Quantity: 50 pcs
Solution: Utilized 5-axis machining to eliminate multiple setups, achieving critical cross-hole alignment and reducing lead time by 30%.
Surgical Instrument Housing
Material: 17-4PH Stainless Steel
Process: CNC Milling & Passivation
Quantity: 500 pcs
Solution: Implemented strict tool-wear monitoring to maintain a Ra 0.4 surface finish, passing all biocompatibility requirements.
Precision Articulation Joint
Material: Titanium Grade 5
Tolerance: ±0.01 mm
Lead Time: 12 Days
Solution: Optimized cutting paths for titanium to prevent work hardening, delivering perfectly concentric joints for smooth robot movement.
Worldwide Delivery
We ship globally using trusted logistics partners, ensuring your parts arrive safely and on time. We offer DDP shipping to simplify customs.
Why LK Tools?
| Feature | LK Tools | Trading Companies |
|---|---|---|
| US Office Support | ✓ | ✗ |
| Direct Factory Pricing | ✓ | ✗ |
| Free DFM Engineering | ✓ | Rarely |
| PPAP & Full Documentation | ✓ | ✗ |
| Dedicated Project Manager | ✓ | ✗ |
| One-Stop Manufacturing | ✓ | Limited |
More Than CNC Machining
Consolidate your supply chain. We offer comprehensive manufacturing solutions under one roof.
What Our Customers Say
"LK Tools has been instrumental in our product launch. Their DFM feedback caught an issue that would have cost us thousands. The 5-axis parts were flawless."
"Finding a reliable CNC supplier who can handle tight tolerances and provide full PPAP documentation was tough until we found LK Tools. Exceptional quality."
"Fast lead times, fair pricing, and having a US contact makes communication seamless. They transitioned our prototypes to mass production effortlessly."
Frequently Asked Questions
Common questions about our CNC machining services.
What is your minimum order quantity (MOQ)?
What is the typical lead time for CNC machined parts?
What tolerances can you achieve?
Do you provide First Article Inspection (FAI) reports?
What materials can you machine?
Do you offer material certifications?
Can you sign an NDA before I upload my drawings?
What surface finishes do you provide?
Do you support blanket orders and scheduled shipments?
How do you handle shipping to the USA or Europe?
More Manufacturing FAQs (DFM, Quality, Assembly)
Is DFM review really free? Yes, our engineers review every uploaded CAD file for manufacturability at no cost to ensure optimal pricing and quality.
Do you offer assembly services? Yes, we provide mechanical assembly, hardware insertion (Helicoils, PEM nuts), and sub-assembly services.
What is your ISO certification? We are an ISO 9001 certified manufacturing facility.
Can you machine 5-axis parts? Yes, we have advanced 5-axis CNC milling centers for complex geometries.
Do you support engineering changes? Yes, our dedicated project managers will work with you through revisions.
Are you a trading company or a factory? We are a direct manufacturer with a production facility in China and a local support office in Dallas, Texas.
How fast can I get a quote? Standard RFQs are quoted within 24 hours.
Can you provide VMI programs? Yes, we can establish Vendor Managed Inventory programs for enterprise clients.
What file formats do you accept? STEP, STP, and IGES are preferred for 3D models. PDF is required for 2D drawings with tolerances.
Do you offer international delivery? Yes, we deliver to North America, Europe, Australia, and Asia.
Ready to Start Your CNC Machining Project?
Upload your CAD files today and receive factory-direct pricing, free engineering review, and a dedicated project manager.