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Precision CNC Machining for Custom Parts Services

Karry Precision offers CNC precision machining service for custom-made metal and plastic parts, including prototype, low-volume, and repeat production. We are able to offer our own internal 3 axis, 4 axis, and 5 axis CNC Milling, CNC Turning, Drilling and tapping of complicated parts with controlled tolerances and dimensional accuracy. We use aluminium, stainless steel, steel, brass, copper, titanium and engineering plastics, and we can offer DFM, inspection and surface finishing to teach your parts through from their drawing to product production.

3-axis, 4-axis, and 5-axis CNC machining capabilities
CNC milling, turning, drilling, tapping, and wire EDM
Complex geometries and multi-surface machining
Prototype, low-volume, and production manufacturing

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CNC parts manufactured as fast as 1 day

Complex and High-Precision Machining Capability
Advanced In-House CNC Equipment
Fast Prototype-to-Production Transition
ISO 9001:2015 Certified Quality Control

CNC Precision Machining Capabilities

Precision CNC Milling

Our 3-, 4- and 5-axis milling capabilities support complex custom parts with multiple features, tight dimensional requirements and controlled surface quality. We machine metals and engineering plastics for prototypes, fixtures, housings, brackets and production components.

Precision CNC Turning

Our CNC turning capabilities are suited for shafts, bushings, sleeves, pins, threaded components, and other cylindrical parts requiring consistent diameters and concentricity. Turning can also be combined with secondary milling, drilling, tapping, and finishing operations for more complex component designs.

5-Axis Precision CNC Machining

5-axis machining enables multiple surfaces and angled features to be produced with fewer setups, helping improve dimensional consistency on complex parts. It is well suited for aerospace components, medical equipment parts, precision housings, fixtures, and other components with difficult-to-reach or multi-surface geometries.

Custom CNC Precision Machined Parts

Precision Housings
Mounting Brackets
Shafts and Axles
Flanges
Bushings and Sleeves
Manifolds
Gears and Pulleys
Machine Fixtures
Electronic Enclosures
Custom Mechanical Components

Have a similar part to manufacture?

Upload your drawing or CAD file to get fast engineering feedback and a quotation.

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Materials for CNC Precision Machining

. Metal .
- Aluminum Alloys
  Lightweight, corrosion-resistant, and easy to machine. Ideal for precision parts requiring strength, dimensional stability, and reduced weight.
  Typical Applications
  
  Electronic Housings
  
  Heat Sinks
  
  Structural Brackets
  
  Automotive Components
  Cost Efficiency:
- Stainless Steel
  Strong, corrosion-resistant, and suitable for demanding operating environments. Commonly selected for parts requiring durability, hygiene, and long service life.
  Typical Applications
  
  Medical Components
  
  Food Processing Parts
  
  Valve Bodies
  
  Marine Hardware
  Cost Efficiency:
- Carbon Steel
  Provides high strength, good machinability, and cost-effective performance. Suitable for structural and mechanical parts exposed to heavy loads.
  Typical Applications
  
  Shafts and Axles
  
  Mounting Plates
  
  Machine Components
  
  Industrial Fixtures
  Cost Efficiency:
- Tool Steel
  Designed for high hardness, wear resistance, and dimensional stability. Ideal for components subjected to repeated impact, pressure, or abrasion.
  Typical Applications
  
  Molds and Dies
  
  Cutting Tools
  
  Precision Fixtures
  
  Wear-Resistant Inserts
  Cost Efficiency:
- Titanium Alloys
  Combines high strength, low weight, corrosion resistance, and excellent performance under extreme conditions.
  Typical Applications
  
  Aerospace Components
  
  Medical Implants
  
  High-Performance Fasteners
  
  Marine Parts
  Cost Efficiency:
- Brass and Copper Alloys
  Offer excellent electrical conductivity, thermal conductivity, corrosion resistance, and reliable machinability.
  Typical Applications
  
  Electrical Connectors
  
  Valve Components
  
  Heat Transfer Parts
  
  Precision Fittings
  Cost Efficiency:
. Plastic .
- ABS
  A cost-effective engineering plastic with good impact resistance, dimensional stability, and machinability. Suitable for prototypes and functional components.
  Typical Applications
  
  Electronic Enclosures
  
  Control Panels
  
  Automotive Interior Parts
  
  Functional Prototypes
  Cost Efficiency:
- POM / Acetal
  Provides low friction, high stiffness, excellent dimensional stability, and good wear resistance for precision mechanical parts.
  Typical Applications
  
  Gears
  
  Bushings
  
  Rollers
  
  Precision Mechanical Parts
  Cost Efficiency:
- Nylon (PA)
  Strong, lightweight, and wear-resistant, with good fatigue resistance and low-friction performance.
  Typical Applications
  
  Bearings
  
  Gears
  
  Spacers
  
  Industrial Wear Components
  Cost Efficiency:
- Polycarbonate
  A durable, impact-resistant plastic with good dimensional stability and optional optical transparency.
  Typical Applications
  
  Protective Covers
  
  Transparent Housings
  
  Inspection Windows
  
  Electronic Components
  Cost Efficiency:
- PEEK
  A high-performance engineering plastic with excellent heat resistance, chemical resistance, strength, and dimensional stability.
  Typical Applications
  
  Aerospace Components
  
  Medical Parts
  
  Semiconductor Equipment
  
  High-Temperature Insulators
  Cost Efficiency:
- PTFE
  Offers extremely low friction, excellent chemical resistance, and reliable performance in corrosive or high-temperature environments.
  Typical Applications
  
  Valve Seats
  
  Insulating Components
  
  Seals and Gaskets
  
  Chemical Processing Parts
  Cost Efficiency:

Don’t See the Material You Need?

Explore our full material list or contact our engineering team for recommendations.

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Surface Finishes for CNC Precision Parts

Karry Precision provides a range of surface finishing services to improve the appearance, corrosion resistance, wear performance, cleanliness, and service life of CNC machined parts.

Anodizing

Anodizing forms a controlled oxide layer on aluminum surfaces, improving corrosion resistance, surface hardness, and wear performance. It also supports a wide range of colors for functional identification or decorative purposes.
Bead Blasting

Bead blasting uses fine abrasive media to produce a smooth, uniform, non-reflective surface. It helps reduce visible machining marks and creates a clean matte appearance without significantly affecting part dimensions.
Powder Coating

Powder coating applies a durable protective layer to metal surfaces through electrostatic spraying and heat curing. It provides strong resistance to corrosion, scratches, impact, and outdoor exposure.
Electroplating

Electroplating deposits a thin metallic coating onto the part surface to improve corrosion resistance, conductivity, hardness, or decorative appearance. Common options include nickel, zinc, chrome, and tin plating.
Polishing

Polishing reduces surface roughness and produces a smoother, brighter finish. Depending on the application, parts can be finished to a satin, brushed, or mirror-like appearance.
Passivation

Passivation removes free iron and surface contaminants from stainless steel, helping restore and strengthen its natural corrosion-resistant oxide layer without changing the part’s dimensions.

Anodizing

Anodizing forms a controlled oxide layer on aluminum surfaces, improving corrosion resistance, surface hardness, and wear performance. It also supports a wide range of colors for functional identification or decorative purposes.

Bead Blasting

Bead blasting uses fine abrasive media to produce a smooth, uniform, non-reflective surface. It helps reduce visible machining marks and creates a clean matte appearance without significantly affecting part dimensions.

Powder Coating

Powder coating applies a durable protective layer to metal surfaces through electrostatic spraying and heat curing. It provides strong resistance to corrosion, scratches, impact, and outdoor exposure.

Electroplating

Electroplating deposits a thin metallic coating onto the part surface to improve corrosion resistance, conductivity, hardness, or decorative appearance. Common options include nickel, zinc, chrome, and tin plating.

Polishing

Polishing reduces surface roughness and produces a smoother, brighter finish. Depending on the application, parts can be finished to a satin, brushed, or mirror-like appearance.

Passivation

Passivation removes free iron and surface contaminants from stainless steel, helping restore and strengthen its natural corrosion-resistant oxide layer without changing the part’s dimensions.

*Not sure which finish is right for your part? Explore our complete guide

CNC Precision Machining Tolerances

Tolerance requirements in CNC precision machining depend on part geometry, material, feature size, machining method and inspection conditions. Karry Precision evaluates critical dimensions based on the functional requirements shown on your drawing rather than applying unnecessary tight tolerances across the entire part.

Proper tolerance planning can reduce unnecessary machining operations and improve production consistency:

Apply tight tolerances only to functional or mating features
Use general tolerances for non-critical dimensions
Avoid unnecessary tolerance accumulation across assemblies
Maintain consistent wall thickness where possible
Allow suitable radii in deep pockets and internal corners

Tolerance Category	Typical Tolerance	Suitable Materials	Cost Impact	Manufacturing Considerations
General Linear Dimensions	±0.10 mm	Metals and engineering plastics	Low	Suitable for most non-critical dimensions using standard CNC milling or turning
Precision Linear Dimensions	±0.05 mm	Aluminum, stainless steel, brass, steel and engineering plastics	Medium	May require precision tooling, controlled setups and in-process measurement
High-Precision Dimensions	±0.02 to ±0.03 mm	Dimensionally stable metals and selected engineering plastics	High	Requires stable fixturing, controlled machining conditions and detailed inspection
Critical Features	Up to ±0.01 mm	Evaluated by material and geometry	High	Available for selected dimensions after engineering review; not applicable to every feature
Hole Diameter	±0.02 to ±0.05 mm	Most machinable materials	Medium	Reaming, boring or precision drilling may be required for tighter hole tolerances
Hole Position	±0.05 to ±0.10 mm	Metals and engineering plastics	Medium	Datum definition and inspection method should be clearly specified on the drawing
Surface Flatness	0.05 to 0.10 mm	Primarily metal parts	Medium	Thin walls, large surfaces and residual material stress may increase deformation risk
Parallelism or Perpendicularity	0.05 to 0.10 mm	Most machinable materials	Medium	Performance depends on datum selection, setup stability and feature spacing
Metric Internal Threads	Typically 6H	Metals and engineering plastics	Low	Standard fit for most general-purpose internal metric threads
Metric External Threads	Typically 6g	Metals and engineering plastics	Low	Standard fit for most general-purpose external metric threads

Not sure about the right tolerance for your part?

Our engineering team can help optimize your design.

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Our CNC Machining Process

STEP 1

Drawing Review & Quotation
STEP 2

DFM Review & Production Planning
STEP 3

Material Preparation & CNC Programming
STEP 4

CNC Precision Machining
STEP 5

Inspection & Surface Finishing
STEP 6

Packaging & Final Delivery

Guides to Optimize Your CNC Parts Design

Process & Manufacturing Guides

CNC Milling, CNC Turning, and 5-Axis Machining Explained

CNC machining includes several different processes, each designed for particular part shapes, feature types, and production requirements. CNC milling, CNC turning, and 5-axis machining all remove material using computer-controlled tools, ...

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Engineering Resource Hub

CNC Machining Tolerances, Materials, and Design for Manufacturability

Producing an accurate CNC-machined component requires more than selecting a machine and loading a CAD file. Material behavior, part geometry, tolerances, surface finish, workholding, cutting tools, and inspection methods must ...

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Engineering Resource Hub

What Is CNC Machining and How Does It Work?

CNC machining is a computer-controlled manufacturing process used to produce accurate parts from metal, plastic, and other machinable materials. CNC stands for Computer Numerical Control, which means that the movement ...

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Common CNC Machining Questions

What tolerances can you achieve with CNC precision machining?

What materials can be used for CNC precision machining?

Do you support prototypes and low-volume CNC production?

When should I use 5-axis precision CNC machining?

What files do you need for a CNC machining quotation?

Can you provide inspection reports and material certificates?

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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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Why Choose Karry for CNC Precision Machining?

Engineered CNC Machining Solutions You Can Rely On

At Karry Precision, we leverage years of industry experience, in-house advanced CNC equipment and ISO 9001-2015 certified quality management system to deliver dependable machining outcomes for all projects. Covering prototype development to volume manufacturing, we pursue high precision, efficient lead times and smooth communication to satisfy your manufacturing demands.

Professional DFM & engineering design support
Swift service spanning prototypes to mass production
Strict ISO 9001:2015 quality control standards
Proven capability in high-complexity precision machining
Smooth communication serving worldwide clients
Flexible production to suit all order volumes

Precision CNC Machining for Custom Parts Services

CNC Precision Machining Capabilities

Custom CNC Precision Machined Parts

Have a similar part to manufacture?

Materials for CNC Precision Machining