Our CNC Machining Services
At WJ Prototypes, we're experts in CNC machining production and prototyping, ready to meet your specific needs. Whether you're after precision for smaller quantities or large-scale production, our services are tailored just for you.
Hot-chamber die casting is a metal casting process specifically designed for low-melting-point alloys like zinc, tin, lead, and magnesium. This process is the most common and faster method than cold-chamber die casting. In this method, the metal is melted within the casting machine, in a furnace connected to the machine. A hydraulic system injects molten metal into the die under high pressure. This process is efficient for producing intricate shapes with high-quality materials that have lower melting points. Still, it is not suitable for alloys with higher melting points due to the risk of damaging the pump that injects the molten metal.
Cold-chamber die casting involves introducing molten metal at room temperature into a separate shot chamber using a ladle or pouring method. The shot chamber contains a ram that vertically forces the molten metal into a steel mold (die) with movable and fixed sections. The ram applies pressure ranging from 2,000 to 20,000 PSI to propel the molten metal into the die. The pressure is maintained until the metal cools and solidifies, after which the finished product is ejected from the die.
What is CNC Machining?
CNC, or computer numerical control machining, is a widely used manufacturing process that uses automated, high-speed cutting tools to remove material from a metal or plastic workpiece until the desired geometry is achieved. Standard CNC machines include 3-axis, 4-axis, and 5-axis milling machines, lathes, and routers. CNC machines can cut almost any material such as metal alloys, plastics, wood, stones, ceramics and more. Making custom machined parts needed for nearly every industry, including automotive, robotics, medical, aerospace, electronics and industrial.
150+
Experienced Engineers
200+
Up-to-date Machines
5000+
Satisfied customers
Advantages of CNC Machining
The subtractive process of CNC machining provides multiple benefits for both prototyping and production parts.
Why Choose Us for Custom CNC Machining?
Fast and Reliable Delivery
Iterate part designs quickly and accelerate product development with quick-turn parts. Our automated design analysis will help spot any difficult to machine features before your design is sent to the manufacturing floor and save you from costly reworks further down the product development cycle.
Advanced Capabilities
Get anodizing, tighter tolerances, and volume pricing options through our network of manufacturers at WJ Prototypes. You'll find plating (black oxide, nickel), anodizing (Type II, Type III), and chromate coating in larger part quantities; tolerances down to ±0.001 in. (0.020mm); and cost-efficient machined parts at higher volumes to lower piece-part price.
Material Selection
We stock more than 30 engineering-grade plastic and metal materials that are suitable for various part applications and industries. Materials range from plastics like ABS, polycarbonate, nylon, and PEEK to aluminum, stainless steel, platinum, and copper.
Infinite Capacity
Eliminate downtime spent waiting for parts and safeguard in-house machining with on-demand relief and infinite manufacturing capacity.
CNC Machining Materials
Aluminum
Aluminum 7075 is an alloy with zinc as the primary alloying element. It has excellent mechanical properties and exhibits high strength, toughness, and resistance to fatigue. It has higher corrosion resistance than other aluminums, making it a great option for aerospace applications.
- Corrosion Resistance
- Toughness
- Ductility
Copper
Copper is also known as HC or high conductivity copper. It has a nominal conductivity of 100% and has high thermal conductivity making it a popular choice for all types of electrical components and conductors. It also offers high ductility and impact strength, making it a versatile and useful material.
- Corrosion Resistance
- High Conductivity
- Ductility
Titanium
Titanium is extremely strong and boasts a high strength-to-weight ratio. It also has excellent corrosion resistance, high operating temperatures (up to 1,000°F) and is nontoxic. Another key is its low thermal expansion and high melting point that is roughly 3,000° F. Machining titanium will be more costly than other metals such as aluminum.
- Corrosion Resistance
- Strength
- Heat Resistance
ABS
ABS is a low-cost engineering plastic that is easy to machine. ABS is an ideal material for structural applications when impact resistance, strength, and stiffness are required. It’s widely used for pre-production prototypes since it has excellent dimensional stability and is easy to paint and glue.
- Strength
- Cost Effective
- Stiffness
ABS
Polycarbonate is an engineering plastic that offers excellent dimensional stability over a wide range of service temperatures. It is commonly used for structural applications when clarity and impact strength are essential. It can also be used in a wide range of electrical applications since it has a low moisture absorption, good insulating properties, and an excellent flammability rating.
- Flame Resistance
- Stiffness
- Moisture Resistance
Surface Finish Options for SLA 3D Printing
Surface finishes can serve either a functional or aesthetic purpose. Surface finishes that serve both purposes are deemed cosmetic finishes, and are used for cosmetic parts. Producing cosmetic parts requires additional measures to minimize defects such as hang marks and scratches from tools.
Clear Coat
Clear cosmetic finish that can be applied to ABS-Like Translucent/Clear (WaterShed XC 11122) and PC-Like Translucent/Clear (Accura 60) materials.
Painting
After smoothing the part with sanding and polishing, parts can be painted with automotive-grade paint. Provide a pantone color with your quote request. We also offer soft-touch painting.
Plating
Electroless nickel plating can be used to achieve parts that are similar to cast aluminum or magnesium.
Dyeing
Dyeing is another method for adding color to 3D prints. This is faster option with a limited color selection, so is a more cost-effective choice than painting.
Decaling
Decaling can be used to add a logo or other graphics to boost cosmetics or function.
Polishing
We can polish parts to a mirror-like finish. If this is a requirement, we ask that you provide either a drawing or image that indicates your finish expectations.
Heat Treatment
Harden and strengthen metal 3D prints with multiple heat treatment options: NADCAP heat treatment, hot isostatic pressing (HIP), solution annealing, and aging.
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Testimonials / Satisfied Customers
Dorothy
Buyer at Leading Energy company
WJ Prototypes is Great!
“We’re glad we recently added WJ Prototypes to our AVL. You guys are always quick and friendly and all the Machining jobs we have sent have gone smoothly!”
Thomas
Engineer at Robotics Company
Our No.1 source for CNC parts
“We had a time sensitive Sheet Metal enclosure with fairly strict cosmetic requirements. WJ Prototypes came through for us and the parts looked great. The full build turned some heads at our Trade Show!”
Marc
Buyer at Electric Car Company
Great prices, lead times, and quality of work
“You guys are one of the easiest job shops I’ve worked with the last 10 years. You are responsive and competitive. We’ve appreciated the awesome work!”
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