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Precision CNC Milling for Custom Metal & Plastic Parts
Custom precision CNC Milling of metal & plastic parts – Prototype, Low Production & Repeat Production – Karry Precision. Brrackets, housings, manifold blocks, fixture plates, heat sinks and other parts with required controlled dimensions and surface quality are suitable for our multi-axis milling. We provide in house machining, inspection and post processing to support doing parts from drawing review to final production with material aluminum, stainless steel, titanium, copper alloys and engineering plastics.
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In-house post-processing capability -
Machining for aluminum, stainless steel, titanium and engineering plastics
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Strict dimensional control and premium surface finishing
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Seasoned manufacturing team with rich precision machining experience
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Flexible MOQ
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Prototype to Production Transition
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Multi-Axis Machining Capability
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ISO 9001:2015 Certified QMS
Precision CNC Milling Capabilities
Suitable for precision housings, brackets, plates, blocks and other parts requiring accurate surfaces, pockets, holes and machined features.
Used for complex profiles, cavities, slots and controlled surfaces where dimensional consistency and finish quality are important.
Drilling, tapping, countersinking and other secondary operations can be integrated into the milling process to reduce setups and improve part consistency.
Custom Precision CNC Milled Parts
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Precision Equipment Housings -
Structural Support Brackets -
Hydraulic Manifold Blocks -
Fixtures & Tooling Plates -
Valve Bodies & Valve Components -
Connector Bases -
Instrument Enclosures -
Custom Spacers & Mounts -
Gear Housing Casings -
Automation Mechanical Blocks
Have a similar part to manufacture?
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Materials for Precision CNC Milling
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. Metal .-
Aluminum (2A12, 5052, 6061, 7075)
Aluminum 2A12 is an Al-Cu-Mg alloy with good strength, machinability and overall mechanical performance for structural and precision components.
Cost Efficiency:
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Stainless Steel (303, 304, 316L)
Great corrosion resistance and mechanical strength. 303 enables easy machining; 304 & 316L offer superior rust and acid resistance for long-service precision components.
Cost Efficiency:
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Brass (H59, H62)
Good ductility and cutting performance with excellent electric and thermal conductivity. Ideal for intricate contours and thread machining with premium surface quality.
Cost Efficiency:
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Copper (C1100)
Outstanding thermal & electrical conductivity and great plasticity. Stable physical characteristics for precision conductive and heat dissipation parts.
Cost Efficiency:
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Titanium Alloy (TC4)
High specific strength, low weight and remarkable corrosion resistance. Properties remain stable under extreme temperature conditions.
Cost Efficiency:
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Steel (45#, 4140)
High tensile strength and rigidity. Compatible with heat treatment to boost hardness and wear resistance for heavy-load mechanical components.
Cost Efficiency:
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. Plastic .-
PEEK
High-temperature resistance, strong mechanical strength and great wear resistance. Outstanding chemical stability and consistent dimensional accuracy.
Cost Efficiency:
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PEI
High rigidity, reliable thermal stability and low thermal expansion. Features excellent insulation and maintains precision after fine machining.
Cost Efficiency:
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POM
Low friction and self-lubricating characteristics. High hardness and dimensional stability for precision moving components.
Cost Efficiency:
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PA66 Nylon
Superior toughness, impact resistance and abrasion resistance. Good fatigue performance and stable machinability.
Cost Efficiency:
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PVC
Strong chemical resistance and reliable insulation. Solid anti-aging performance with cost advantages.
Cost Efficiency:
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PTFE
Ultra-low friction coefficient, wide temperature adaptability and complete chemical inertness, featuring great anti-sticking performance.
Cost Efficiency:
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Explore our full material list or contact our engineering team for recommendations.
Surface Finishing Options
We offer a variety of surface finishing options to enhance the appearance, durability, and performance of your CNC machined parts.
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Anodizing
Type II anodizing improves corrosion resistance and appearance, while Type III hard anodizing provides increased wear resistance.
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Powder Coating
Delivers a thick, uniform protective coating with strong anti-corrosion capability. Features rich color selection and excellent surface coverage.
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Passivation
Removes surface contaminants of stainless steel and generates a passive film. Effectively strengthens rust resistance without altering part dimensions.
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Electropolishing
Achieves a smooth, bright metallic surface by electrochemical treatment. Improves corrosion resistance and reduces surface burrs.
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Sandblasting
Creates uniform matte texture on component surfaces. Eliminates machining tool marks and improves coating adhesion.
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Nickel Plating
Provides good hardness, wear resistance and corrosion protection. Ensures smooth surface and stable performance for metal components.
*Not sure which finish is right for your part? Explore our complete guide
Precision CNC Milling Tolerances
Tolerance requirements in precision CNC milling depend on part geometry, material, feature size, fixturing and inspection conditions. KT Tool reviews critical dimensions according to part function and manufacturing feasibility rather than applying unnecessarily tight tolerances across the entire component.
Reasonable tolerance design lowers machining expenses and boosts production efficiency:
- Avoid overly tight tolerances without functional requirements
- Adopt standard tolerances for non-critical features
- Simplify intricate geometries where possible
- Maintain uniform wall thickness for better structural stability
- Take material properties into consideration during processing
| Tolerance Type | Standard Tolerance (±mm) | Material | Cost Impact | Machining Feasibility |
| Distance Dimensions | ± 0.127 mm (± 0.005”) | All materials | Low | Standard 3-axis milling, compatible with most materials |
| Orientation and Form Dimensions | ± 0.127 mm (± 0.005”) | All materials | Medium | General CNC machining; higher precision required for large workpieces |
| Angularity | ± 0.5° | All materials | Medium | Realizable on 3-axis and 5-axis equipment |
| Edge Condition | Sharp edges broken & deburred | All metals & plastics | Low | Standard finishing service; sharp edges available upon drawing requirement |
Not sure about the right tolerance for your part?
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Our Precision CNC Milling Process
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STEP 1
Drawing & Design Review -
STEP 2
Material Selection -
STEP 3
CNC Programming & Setup -
STEP 4
Precision CNC Milling -
STEP 5
Surface Finishing -
STEP 6
Inspection & Quality Control -
STEP 7
Packaging & Delivery
Guides to Optimize Your CNC Parts Design
Precision CNC Milling FAQs
Ready to Start Your Custom Parts Project?
Upload your drawings (STEP, STP, IGES, STL) or contact our team for a fast and confidential quotation.
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Engineered CNC Milling Solutions You Can Rely On
With more than 20 years of manufacturing experience, KT Tool supports CNC milling projects from prototype validation to repeat production. Our in-house machining, inspection and post-processing capabilities help reduce handoffs between suppliers while maintaining control over dimensions, surface requirements and production consistency.
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Multi-Axis Milling Capability
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ISO 9001:2015 Quality Management
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In-House Inspection & Finishing
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Prototype to Production Support
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DFM Review Before Machining
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Material & Inspection Documentation
