Injection Molding
Tooling and molding for your repeat plastic parts.
CNC MACHINING SERVICES
Custom CNC
Custom CNC
Machining Services
Precision Milling & Turning for Your Part.
Get custom metal and plastic parts made around your drawing. Review critical fits, material, machining cost and inspection requirements before production, with Dallas-area support for your project.
Share your 3D CAD, 2D drawing, material, quantity and required delivery date.
- CAD upload available
- NDA available
- DFM review for your part
ISO 9001 Certified
Quality Management
3/4/5-Axis CNC
Complex Geometries
Critical Fits Reviewed
Drawing-specific acceptance
Metals & Plastics
Material Selection Support
Prototype to Production
Your Volume, Your Plan
Plan CNC Capacity Around Your Demand
Align your sample approval, repeat quantities and delivery milestones before you order.
80+
CNC Machines
10,000 m²
Manufacturing Facility
3–10 Days
Sample timing by project
20+
Countries Served
Dallas
Office & Warehouse
Finishing
Options for Your Application
Machining Capabilities
CNC MACHINING
CNC Machining Overview
Built Around Your Part, Your Tolerance and Your Production Goals
Your precision CNC machining service should protect how your part fits and works. Use CNC milling for pockets and mounting faces, CNC turning for rotational features, and multi-axis machining for complex access. Share your critical dimensions so process selection, workholding and inspection support your assembly.
- Reduce design risk before machining
- Choose the right process and material
- Protect critical dimensions with inspection planning
- Scale from prototype to repeat production
- Balance performance, lead time and cost
- Support your complex geometries and critical features
Machining Capabilities
Choose CNC milling, turning or multi-axis machining around your geometry, critical features and order quantity.
CNC Milling
Machine your pockets, mounting faces and multi-side features with 3-axis and 4-axis CNC milling.
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CNC Turning
Produce your shafts, sleeves and flanges with concentric diameters, grooves and threads.
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5-Axis CNC Machining
Reach your complex surfaces and angled features. Review setups around your critical datums.
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Swiss CNC Machining
Support your small, slender turned parts. Confirm diameter, length, material and batch needs.
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Wire & Sinker EDM
Review narrow slots and internal corners with Wire EDM. Sinker EDM scope is confirmed with your drawing.
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Precision Grinding
Specify your mating diameters, flatness and surface finish. Grinding scope is confirmed during your drawing review.
Learn More →Illustrative component concepts. Process availability and inspection scope are confirmed against your drawing.
Precision Parts Gallery
Explore CNC component examples for your material, geometry and assembly requirements.
Aluminum
CNC Milling
Critical fits reviewed
Stainless Steel
CNC Turning
Drawing-specific
Brass
CNC Milling
Drawing-specific
5-Axis Geometry
5-Axis CNC
Drawing-specific
PEEK
CNC Milling
Drawing dependent
Precision Shafts
CNC Turning
Drawing-specific
Illustrative component examples. Your material grade, tolerances and inspection scope are confirmed against your drawing.
Which CNC Process Fits Your Part?
Compare CNC machining approaches to find the best fit for your geometry and production requirements.
| Process | Best For | Typical Geometry | Typical Volume | Key Advantage |
|---|---|---|---|---|
| 3-Axis Milling | Standard prismatic parts | Simple to moderate | 1–10,000+ | Cost-effective and versatile |
| 4-Axis Milling | Multi-side features | More complex | 1–10,000+ | Fewer setups and refixtures |
| 5-Axis CNC | Complex surfaces | Highly complex | 1–5,000+ | Maximum geometry freedom |
| CNC Turning | Round / cylindrical parts | Rotational | 1–100,000+ | Precision and production efficiency |
| Swiss Machining | Small precision / slender parts | Long / slender | 1–100,000+ | Stable small-part production |
Materials & Surface Finishes
Choose your CNC machining material and finish together. Strength, corrosion resistance, temperature and mating dimensions affect the final part.
Aluminum 6061
General-purpose, cost-effective
Aluminum 7075
High-strength, aerospace grade
Stainless 316L
Corrosion resistance
Titanium Grade 5
High strength-to-weight
Brass C360
Excellent machinability
Carbon Steel 1018
Strong and economical
POM (Delrin)
Low friction, wear resistant
PEEK
High temp & chemical resistance
Nylon
Durable and versatile
PTFE
Excellent chemical resistance
ABS
Good mechanical properties
Polycarbonate
Impact resistant, transparent
Copper
High thermal/electrical conductivity
Bronze
Wear resistance, bearings
Tool Steel
High hardness, dies/molds
Options for Your Application
Anodizing
Hard Anodizing
Electroless Nickel
Black Oxide
Chem Film
Passivation
Powder Coating
Sand Blasting
From Prototype to Production
Carry your drawing revisions, material choice and acceptance criteria from prototype CNC machining into repeat production.
01
Prototype
1–10 pcs
Validate your design and verify fit, form and function.
02
Functional Prototype
10–100 pcs
Test with production materials and refine your design.
03
Small Batch
100–1,000 pcs
Control cost before scaling with consistent quality.
04
Production
1,000–100,000+ pcs
Scale your supply without re-sourcing.
CNC Tolerances & Quality
Define your critical datums, mating dimensions and inspection method before machining.
Maximum Dimensions
Maximum part size depends on the machine and part geometry. Below are typical capabilities for CNC machining.
| Machine Type | Typical Maximum Part Size (L × W × H) |
|---|---|
| 3-Axis CNC | 1200 × 1000 × 650 mm |
| 4-Axis CNC | 600 × 400 × 400 mm |
| 5-Axis CNC | 500 × 400 × 400 mm |
| Swiss CNC | Up to Ø32 mm × 300 mm (length) |
Minimum Features
Practical guidelines for small features to ensure manufacturability and prevent tool breakage.
| Feature | Typical Guideline |
|---|---|
| Minimum hole diameter | 1.0 mm (varies by depth) |
| Minimum wall thickness | 0.5 mm (metal) / 1.0 mm (plastic) |
| Minimum slot width | 1.2 mm |
| Minimum pocket feature | Drawing dependent |
Threading Capabilities
- Metric & imperial standard threads
- Internal and external threads
- Thread milling for large diameters or tough materials
- Rigid tapping for standard holes
- Custom thread profiles available after engineering review
Standard Tolerances
Typical tolerances are drawing and geometry dependent.
- General machining: ±0.05 mm typical standard
- Critical features: Tighter tolerances (down to ±0.005 mm) are available after engineering review.
- Tolerance capabilities vary significantly based on material choice, wall thickness, and part geometry.
Internal Radii Guidelines
Because CNC tools are round, sharp internal corners are impossible to machine directly.
- Design internal corner radii to be at least 1/3 of the cavity depth.
- Use standard end mill sizes when specifying radii.
- For sharp corners, consider adding dog-bone reliefs or using EDM processes.
Text & Engraving
We support various methods for adding text, logos, or part numbers to your components.
- Laser marking (high contrast, flat surfaces)
- CNC engraving (machined directly into the surface)
- Serialization support
- Minimum text size is drawing dependent, typically 2-3mm height for milled text.
Agree how your critical features will be measured.
FAI
First Article Inspection
CMM Report
Inspection Report
PPAP
Production Part Approval
CoC
Certificate of Conformance
Material Certs
Mill Certs Available
RoHS / REACH
Compliant Materials
Design Guidelines
Review tool access, wall thickness and internal corners to reduce your avoidable machining cost.
Wall Thickness
Review stiffness and distortion
Internal Radii
Match your cutter access
Deep Pockets
Reduce long-tool deflection
Hole Depth
Check your depth-to-diameter ratio
Threads
Specify standard thread and depth
Deburring
Define your edge-break requirement
Industries & Applications
Match your application to the right material, geometry and documented inspection requirements.
Aerospace CNC Machining
Structural brackets, housings and high-performance parts
Medical CNC Machining
Precision components for medical devices
Semiconductor CNC Machining
High-precision components for semiconductor equipment
Robotics CNC Components
Joints, housings and motion-control parts
Automotive CNC Machining
Prototypes and durable production parts
Industrial Automation
Custom components for automation systems
Why Engineers & Buyers Choose LK MFG
Know what your quote covers, how your parts are approved and who supports your next order.
Factory-Direct
Review your machining, finishing and inspection scope with one manufacturing contact.
Engineering & DFM
Resolve your thin walls, deep pockets and tolerance risks before material is cut.
Documented Quality
Request FAI, CMM results and material records for your agreed inspection scope before ordering.
Global + Local Support
Coordinate your drawing review and delivery plan with Dallas-area support and manufacturing in China.
What Drives Your CNC Machining Cost?
See how your material, cycle time, tolerances and order quantity affect cost. Compare alternatives before changing your design.
Material
Geometry
Tolerances
Quantity
Finish & Inspection
CNC Machining Services FAQs
Answers for your quotation, drawing review and production planning.
What is CNC machining?
CNC machining uses computer-controlled milling and turning equipment to remove material from a workpiece and create precise components from CAD data. It is highly repeatable and suitable for both metals and plastics.
What tolerances can you hold?
Tolerance capability depends on geometry, material, feature size and inspection requirements. Our standard machining tolerance is ±0.05 mm, but critical dimensions can be held much tighter during custom review.
What materials can you machine?
We machine common aluminum, stainless steel, carbon steel, brass, copper, titanium and engineering plastics including POM, Nylon, PTFE, PC, and PEEK.
How fast can you quote?
Quote timing depends on drawing complexity and project requirements. Standard quotes are typically returned within 24 hours. Complete CAD files, material, quantity and tolerance information help speed up review.
Do you support prototype and production orders?
Yes. Share your prototype quantity, expected repeat demand and delivery schedule. We will review how your approved samples, drawing revisions and inspection requirements carry into production.
Can you sign an NDA?
Yes. We understand the importance of IP protection. NDA review is available before you share confidential drawings or project information.
