Prototyping with
CNC Machining Service

What We Offer

Transmission case for visualization of interior

INAC US’s Prototyping with CNC Machining service crafts prototypes with a diverse range of materials, including clear plastic/resin, ferrous and non-ferrous metals.

Our advanced CNC technology and skilled team utilize CNC milling and turning methods to work with materials such as Polycarbonate, ABS, acrylic, POM, and various metal grades.

Choose INAC US for efficient, accurate, and reliable prototyping solutions tailored to your unique project requirements, transforming your ideas into high-performance products.

Materials We Handle

Plastic/Resin

  • Polycarbonate
  • ABS
  • Acrylic
  • POM
  • PC/ABS
  • PP
  • PE
  • HDPE
  • PPS
  • PBT
  • 6N
  • 66N
  • MC Nylon
  • PET
  • PVC
  • UNILATE
  • PEEK
  • CFRTP, etc.

Also, GF grade, CF grade, conductive grade, etc. for each material.

Ferrous Metal

  • SS40
  • S45C
  • S50C
  • SUS303
  • SUS304

Non-Ferrous Metal

  • Pure titanium (2 types)
  • A1000 series
  • A2000 series
  • A5000 series
  • A6000 series
  • A7000 series
  • ADC12
  • Gunmetal
  • Brass
  • Oxygen-free copper

CNC Machining Methods

CNC Milling

This is a machining method that uses a 3-axis or 5-axis machine to remove unnecessary portions in order to create the desired shape. Resin blocks can be machined and processed this way.

CNC Turning/Lathing

This is a machining method in which the workpiece is rotated and a fixed cutting tool is applied to it. It is mainly used for machining cylindrical parts. Combined lathes can process complex shapes with a single machine by performing both lathe processing and milling together.

CNC Milling Tolerances

Maximum Part Size41.34/20.87/20.08 inches (Mori Seiki) or 41.34/25.59/14.96 inches (Iwama)
Depending on the material, even larger sizes can be accommodated by bonding.
Standard Lead TimeUsually 5 to 7 days. May vary depending on size, quantity, etc.
General TolerancesJIS B 0405 Medium grade ±0.00197 inches
Precision Tolerances±0.00118 inches (Please feel free to contact us even if you need higher precision.)
Minimum Feature SizeMinimum blade size is 0.0118 inches.
Threads and Tapped HolesSuitable for threading, tapping, inserts, heliserts, etc.

Past Works

Transmission Case

Visualization of interior for any mechanical parts is available.

Internal visualization for transmissions is used in automobiles / industrial machines.

It is possible to observe the internal oil flow inside. It is possible to reproduce the original shape with high precision by combining polycarbonate machining and our unique technologies of transparent treatment.

Non-ferrous Metal

A wide range of materials are available, including aluminum.

We proudly offer only the highest quality.

Outstanding high-quality products can be produced by a highly rigid 5-axis machining center, improvement of machining conditions, and set-up for processing.

Acrylic Automobile

Highly transparent acrylic machining automobile processed with 5 axis machining center. 

Characteristics
Material: Acrylic

vs. Other Processing Methods

vs. 3D Printing

Advantages of CNC machining:

  • High precision and accuracy
  • Wide range of material options
  • Produces robust, functional prototypes

 

Disadvantages of CNC machining:

  • Can be time-consuming for complex parts
  • Less cost-effective for one-off designs

vs. Turning/Lathing

Advantages of CNC machining:

  • Capable of creating complex 3D geometries
  • Offers high precision and accuracy
  • Works with a wide range of materials

 

Disadvantages of CNC machining:

  • Can be less cost-effective and slower for simpler, symmetrical parts
  • Tool accessibility may limit the complexity of parts

vs. Injection Molding

Advantages of CNC machining:

  • Capable of creating complex 3D geometries
  • Offers high precision and accuracy
  • Works with a wide range of materials
  • Allows for easy design changes and iterations

 

Disadvantages of CNC machining:

  • Can be less cost-effective and slower for mass production
  • Tool accessibility may limit the complexity of parts

vs. Vacuum Casting

Advantages of CNC machining:

  • High precision and accuracy
  • Capable of creating complex 3D geometries
  • Works with a wide range of materials

 

Disadvantages of CNC machining:

  • Can be less cost-effective and slower for producing large quantities of parts
  • Tool accessibility may limit the complexity of parts

FAQs

41.34/20.87/20.08 inches (Mori Seiki) or 41.34/25.59/14.96 inches (Iwama)
Depending on the material, even larger sizes can be accommodated by bonding.

We can handle all types of resins and nonferrous metals. For details, please refer to the description of compatible materials at the top.

The following factors affect cost: material, form, dimensional accuracy, finish level, delivery date, quantity.

We can accept solid 3D CAD models in IGES (.igs), STEP (.stp) or PARASOLID(.x_t).

Yes, we will propose the most appropriate materials and construction methods for the intended use, operating environment, and required quality.

Get In Touch!

If you have something you want to make, please contact us. Even a rough idea is OK.

We will give shape to your idea and deliver it to you. Please feel free to contact us.

STEP5: Quality Assurance and Precision Inspection

A quality inspection is performed. At INAC, where quality comes first, we use CMMs, gauges, and other equipment for precision checks.

STEP4: Post-Processing and Finishing

Finishing is done by removing the supports, polishing, and applying transparency treatment. It is also possible to paint and apply plating to the formed product.

STEP3: UV-Laser Print Formation (SLA Process)

Output: The product is formed by irradiating the liquid with a laser beam of UV light and laminating it. The conditions of the external environment, such as room temperature and humidity, must be maintained.

STEP2: Model Program Generation and Support Adjustment

A program for model formation is created. Depending on the shape, it may be necessary to adjust the degree of tilt and the position of the supports.

STEP1: CAD File Submission

Upload your CAD to our online quoting platform.

STEP 3: Rendering and Scene Integration

We can also handle exterior modeling and interior structure design based on illustrations. After creating the 3D models, we can create a rendering to fit a scene. We can deliver images even if we do not proceed with production.

STEP 2: Detailed Design and 3D Modeling

Once the design is determined, drawings and 3D models will be created. The structure will be examined, taking into consideration not only the external design but also functionalities such as mating and sliding.

STEP 1: Initial Design Consultation

The first step is a meeting to discuss the project. Drawings are not required for this meeting. We will create a design from a sketch based on the overall image and concept that you have in mind.

STEP5: Quality Assurance and Inspection

We perform quality inspections. At INAC, where quality comes first, we use CMMs, gauges, and other equipment for precision checks.

STEP4: Post-Casting Finishing

Vacuum casting materials are cured and then taken out of the silicone rubber mold. Then we perform finishing such as deburring and gating, and they are made into finish products.

STEP3:Material Injuction

Liquid casting material is injected into the silicone rubber mold in a vacuum environment. 

STEP2: Mold Preparation

The silicone mold is cut open into a male and female mold, and the master model is removed.

STEP1: Mold Creation

The master model is fixed to a wooden frame and silicone is poured to create a mold.