Custom Sheet Metal Fabrication & CNC Machining FAQs

Precision CNC Machining for EV Component Solutions

For more than 50 years, H&S Manufacturing Co. has been a trusted provider of custom precision manufacturing. Serving industries from aerospace and defense to medical and commercial, our team combines expertise in sheet metal fabrication and CNC machining with a strong commitment to quality and on-time delivery.

This FAQ highlights our most common customer questions about capabilities, materials, tolerances, certifications, and value-added services.

Capabilities & Manufacturing Expertise

What’s the difference between sheet metal fabrication and CNC machining?

Sheet metal fabrication is a formative process that shapes thin metal sheets through processes such as cutting, bending, punching, or stamping. It is well-suited for enclosures, brackets, panels, and other parts where strength and versatility are a top priority.

CNC machining is a subtractive process that begins with a solid block or workpiece and uses computer-controlled cutting tools to remove material. This approach is ideal for producing parts with intricate details, complex geometries, and tight tolerances.

 

What materials do you work with?

The materials used depend on the needs of the application, such as weight reduction, corrosion resistance, or added strength.

Common materials we work with for sheet metal fabrication include:

  • Aluminum
  • Cold rolled steel
  • Hot rolled steel
  • Stainless steel
  • Brass
  • Copper
  • Galvanized steel

Common materials we work with for CNC machining include:

  • Aluminum
  • Brass
  • Cold rolled steel
  • Hot rolled steel
  • Stainless steel
  • Copper
  • Galvanized steel
  • Plastics
  • Reinforced epoxy (FR4)

 

How precise are your tolerances?

H&S maintains some of the industry’s tightest tolerances to ensure part accuracy:

  • Sheet metal fabrication: bend (±.005 inches), hole-to-hole (±.005 inches), and other feature-specific tolerances
  • CNC machining: ±.001 inches (±.0254 mm)

Each part is produced to match your exact design specifications.

 

Can you handle both prototypes and production runs?

Yes. Our equipment and processes are built for scalability. We support projects of all sizes, from a single prototype to high-volume production runs. Typical lead times are:

  • Sheet metal fabrication: about 4 weeks
  • CNC machining: about 6 weeks

 

Value-Added Services & Quality Assurance

Do you offer finishing services?

Yes. To deliver production-ready parts, H&S provides a wide range of finishing services under one roof, including:

  • Powder coating
  • Painting
  • Plating
  • Heat treating
  • Silk screening

What about assembly? Can you build a complete product?

We offer complete box builds and electromechanical assemblies. From fabricating individual parts to managing boards, wiring harnesses, and chassis, H&S can take your project through to a fully assembled product.

How do you ensure quality and consistency?

Our processes are backed by AS9100D, ISO 9001:2015 certifications, AS9146 compliant, and full ITAR compliance, ensuring consistent, traceable quality for every job. For sensitive projects, we maintain strict site security and advanced cybersecurity protections, including DFARS Clause 252.204-7012 compliance, cloud-based tools, and network monitoring.

Partner with H&S for Precision Manufacturing You Can Trust

For more than 50 years, H&S Manufacturing has supported industries with precision sheet metal fabrication and CNC machining services. Our team pairs advanced equipment with strict quality systems to ensure every part meets your exact requirements.

From one-off prototypes to high-volume production, customers rely on H&S for consistent results, dependable lead times, and a full range of value-added finishing services. Whatever your project demands, we provide the expertise and capabilities to keep your project moving with confidence.