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Precision Machining — Nebo, North Carolina

Precision Machining Services

Brown Tool & Mold operates a full-service precision machining offices in Nebo, NC — equipped with 5-axis CNC machining centers, sinker EDM, wire EDM, hard milling, CNC hard turning, ID/OD grinding, graphite machining, and polishing. Tolerances to ±0.0002" on grinding. Aerospace, defense, industrial, and tooling programs served.

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Precision Machining at a Glance
±.0002"
Grinding ToleranceTightest tolerance capability on precision ground components
41+
Years ExperiencePrecision machining for tooling, aerospace, and defense
9
Machining CapabilitiesFull spectrum from CNC to EDM to grinding and polishing
±0.0002" Grinding Tolerance
5-Axis CNC Machining
Sinker & Wire EDM
Aerospace & Defense
Nebo, North Carolina
Our Machining Facility

Full-Service Precision Machining

Brown Tool & Mold operates a full-service precision machining offices in Nebo, North Carolina serving aerospace, defense, industrial, and tooling programs across the United States. Our machining capabilities cover the complete spectrum — from complex 5-axis CNC work and EDM through hard turning, precision grinding, graphite machining, and hand polishing.

Our precision machining team has 41 years of experience producing tight-tolerance components in a wide range of metals and materials — from tool steels and stainless alloys to aluminum, titanium, and specialty materials for aerospace and defense applications.

Standard CNC machining tolerances to ±0.0005". Grinding tolerances to ±0.0002". All work is dimensionally verified before delivery.

Precision CNC machining at Brown Tool and Mold facility in Nebo NC
What We Machine

Precision Machining Capabilities

Brown Tool & Mold provides a complete suite of precision machining services — covering every process required for complex tooling, aerospace components, and industrial precision parts.

Precision 5-Axis CNC Machining

Full 5-axis simultaneous machining for complex geometries, undercuts, and compound angles that cannot be achieved with 3-axis work. Reduces setup time and improves accuracy on complex components.

  • Complex 3D geometry in a single setup
  • Tight tolerances on compound angles
  • Reduced fixturing and setup time
  • Optimized material utilization

Sinker EDM

Electrical discharge machining for deep cavities, narrow slots, and complex internal geometry in hardened materials. Ideal for mold components, dies, and precision aerospace parts where conventional cutting cannot reach.

  • Tolerances within a few microns
  • Machines any electrically conductive material
  • Deep narrow cavities and complex 3D shapes
  • Non-contact — no deformation or tool wear risk

Wire EDM

Precision wire cutting for complex profiles, tight tolerances, and intricate internal features in hardened metals and conductive materials. Minimal heat-affected zone and excellent surface finish.

  • Complex profiles and intricate geometry
  • Excellent surface finish quality
  • Minimal heat-affected zone
  • Holes, slots, cavities with high precision

Hard Milling

High-speed milling of hardened materials up to 65 HRC without the need for annealing and re-hardening. Produces excellent surface finishes on hardened tool steel and other hard materials.

  • Materials to 65 HRC Rockwell hardness
  • Precise dimensional accuracy
  • Excellent surface finish quality
  • Complex geometries and intricate features

CNC Hard Turning

Precision turning of hardened materials up to 65 HRC. Produces tight tolerances and improved surface finish on cylindrical components — often eliminating the need for subsequent grinding operations.

  • Hardened materials to 65 HRC
  • Complex geometries and tight tolerances
  • Eliminates secondary grinding in many cases
  • Wide range of part sizes and shapes

ID / OD Grinding

Internal and external cylindrical grinding to very tight tolerances — the tightest dimensional capability in our facility. Produces high-quality surface finishes on a wide range of metals, ceramics, and hard materials.

  • Tolerances to ±0.0002"
  • Surface finish Ra values less than 0.4 microns
  • Internal and external grinding applications
  • Metals, ceramics, and hard materials

Surface Grinding

Precision surface grinding for flatness, parallelism, and surface finish on mold plates, tooling components, and precision industrial parts. Produces highly consistent results across large batches.

  • Exceptional flatness and parallelism
  • High surface finish quality
  • Consistent results across production runs
  • Mold plates, tooling components, industrial parts

Graphite Machining

Precision machining of graphite electrodes for sinker EDM applications. Complex electrode geometry machined to tight tolerances for accurate EDM work on mold cavities and precision components.

  • Complex electrode geometry with tight tolerances
  • Smooth surface finishes on graphite
  • High-speed graphite machining
  • Wide range of shapes and sizes

Polishing

Hand polishing and CNC-assisted polishing for mold cavities, aerospace components, and precision surfaces requiring high cosmetic quality or specific surface finish specifications.

  • Mold cavity polishing to SPI finish standards
  • Complex shapes and tight tolerances
  • Consistent results from prototype to production
  • Metals, plastics, and composites
Capabilities at a Glance

Precision Machining Specifications

±.0005"
CNC Tolerance
Standard CNC machining tolerance on complex components
±.0002"
Grinding Tolerance
Tightest tolerance capability on precision ground components
65 HRC
Max Hardness
Hard milling and CNC hard turning capability
9
Capabilities
Full spectrum precision machining services under one roof
Specialized Programs

Aerospace & Government Contracting

Aerospace Machining

Aerospace Precision Machining

Brown Tool & Mold provides precision machining services for aerospace applications — from small intricate components to larger structural parts. Our skilled technicians utilize the latest equipment and techniques to deliver high-quality results with fast turnaround. Whether you require a single specialized part or a full production run, our team is dedicated to meeting your aerospace manufacturing requirements with precision and efficiency.

Government Contracting

Defense & Government Machining

Brown Tool & Mold has a long and successful history of government contracting and working as a subcontractor for the defense industry. We have developed specialized expertise in precision machining for defense applications — from small precision parts to large-scale components — with a commitment to quality, on-time delivery, and documentation standards that government programs require.

What We Machine

Materials We Machine

Brown Tool & Mold machines a broad range of metals and materials across tooling, aerospace, defense, and industrial programs. Our experience spans standard engineering materials through exotic alloys and specialty materials.

Tool Steels

H13, P20, S7, D2, A2, O1, and other tool steels in both annealed and hardened conditions. Primary material for injection mold components, dies, and precision tooling.

Stainless Steels

420, 440C, 17-4 PH, 316, and other stainless alloys for corrosion-resistant tooling, medical mold components, and aerospace applications.

Aluminum Alloys

6061, 7075, 2024, and other aluminum alloys for prototype tooling, aerospace structural components, and lightweight industrial parts.

Titanium

Ti-6Al-4V and other titanium alloys for aerospace and defense applications requiring high strength-to-weight ratio and corrosion resistance.

Specialty & Exotic Alloys

Inconel, Hastelloy, Beryllium Copper, and other specialty alloys for high-temperature, high-performance, and demanding industrial applications.

Graphite & Ceramics

Graphite electrode stock for EDM applications, and machinable ceramics for specialized industrial and tooling components requiring non-conductive or high-temperature materials.

Related Services

Precision Machining Supporting Services

Precision machining at Brown Tool & Mold is fully integrated with our injection mold manufacturing and additive manufacturing capabilities.

Injection Mold Manufacturing

Precision machining is the foundation of every injection mold we build. CNC machining, EDM, and grinding are applied to every mold component from cavity and core through slides, lifters, and ejector systems.

View Injection Mold Services

Metal 3D Printing

Metal 3D printed components often require post-processing machining to achieve final tolerances. Our precision machining capability handles additive and subtractive manufacturing under one roof.

View 3D Metal Printing

Mold Design & Engineering

Every component we machine starts with an engineered design. Our mold design team using NX CAD delivers machining-ready models directly to the shop floor via a paperless workflow.

View Mold Design Services

Global Mold Sourcing

When globally sourced molds require modification, repair, or engineering changes after delivery, our precision machining team handles it domestically — fast turnaround, full accountability.

View Global Sourcing

Industries We Serve

Precision machining services support automotive, medical, aerospace, defense, industrial, and tooling programs across the United States from our offices in Nebo, North Carolina.

View Our Markets

Request a Quote

Send us your part files, material requirements, and tolerance specifications. Our engineering team will review your program and provide a detailed machining quote with lead time.

Contact Our Team
Common Questions

Precision Machining FAQ

Common questions about precision machining services at Brown Tool & Mold.

What tolerances can you hold?

Standard CNC machining tolerance is ±0.0005". On precision ground components our tolerance capability is ±0.0002". Tighter tolerances are achievable on specific features through EDM, grinding, and precision fitting processes. All work is dimensionally verified before delivery. Contact us to discuss your specific tolerance requirements.

What materials can you machine?

Brown Tool & Mold machines a broad range of materials including tool steels (H13, P20, S7, D2, A2), stainless steels, aluminum alloys (6061, 7075), titanium, specialty alloys (Inconel, Hastelloy, Beryllium Copper), graphite, and machinable ceramics. Contact us if you have a specific material requirement not listed here.

Do you do aerospace and defense machining?

Yes. Brown Tool & Mold has a long history of aerospace precision machining and government contracting — working as a subcontractor for defense programs requiring tight tolerances, full documentation, and on-time delivery. We machine aerospace components from small intricate parts to larger structural components. Contact us to discuss your program.

Can you machine hardened materials?

Yes. Brown Tool & Mold performs hard milling and CNC hard turning on materials up to 65 HRC Rockwell hardness — eliminating the need to anneal and re-harden parts for machining. Sinker EDM and wire EDM also machine hardened conductive materials regardless of hardness.

What is sinker EDM used for?

Sinker EDM (electrical discharge machining) uses controlled electrical discharges to erode material from hardened metal. It is used for deep cavities, narrow slots, sharp internal corners, and complex geometry that cannot be achieved with conventional cutting tools. At Brown Tool & Mold, sinker EDM is used extensively for injection mold cavity and core work as well as precision aerospace and defense components.

Where are you located and what areas do you serve?

Brown Tool & Mold is located at 86 Waterfall Trail, Nebo, North Carolina 28761. We serve customers across the United States — receiving part files electronically, machining at our Nebo, NC facility, and shipping finished components directly to customers nationwide. Contact us at (937) 620-4261.

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Ready to Discuss Your Machining Program?

Send us your part files, material, and tolerance requirements. Our engineering team will review your program and provide a detailed quote with lead time.

Nebo, North Carolina
(937) 620-4261
Tolerances to ±0.0002"
Aerospace & Defense
Request a Quote Call (937) 620-4261

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Brown Tool and Mold — The Mold Maker — Nebo NC

“Brown Tool & Mold is a custom injection mold manufacturer and mold maker in Nebo, North Carolina.”

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BBB RATING: A-

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OPENING HOURS

  • Monday - Friday:
  • 7 AM - 4:30 PM
  • Saturday:
  • 7 am - 11 am

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