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Precision Surface Grinding

Precision grinding is a true specialty! It’s like an art.

Our machinists are highly skilled in their craftsmanship of grinding to extremely precision tolerances. For example, we are accustomed of holding tolerances to a concentricity of .000025”. Our people are experts in this field. If you have a requirement for close tolerance grinding, or have a unique job requiring grinding, give us a call. We will work with you to handle your complex and unique jobs. Below is a list of Tri-Gon’s grinding and finish capabilities:

High Precision Grinding Techniques:

  • Centerless Grinding (Plunge and Thru feed)
  • Surface Grinding
  • I.D. (Inside Diameter) Grinding
  • O.D. (Outside Diameter) Grinding
  • Cylindrical Grinding
  • Precision grinding of bar stock to custom O.D. sizes and close tolerances.

Grinding Surface Finishes:

  • 64 RMS
  • 32 RMS
  • 16 RMS
  • 8 RMS
  • and even 1 RMS (depending on the part)

Additional Finish Callouts:

  • Precise Buffing
  • Quality Fine Polishing
  • High Precision Lapping
  • Precision I.D. Honing
  • Fine Finish Tumbling
Grinding Surface Finishes

Prototyping to Production Support

Tri-Gon Precision supports grinding projects at every stage, from single-piece prototypes to high-volume production. Whether it’s refining a new design or maintaining consistency across repeat orders, the team provides fast response times and clear communication throughout the quoting and production process. By integrating grinding with other in-house capabilities such as CNC Swiss screw machining and micromachining, the workflow stays efficient and reliable.

Quality Assurance and Certifications

Precision depends on control, and Tri-Gon maintains strict quality management procedures to match. The company is ISO 9001 compliant and operates in compliance with military specifications, including MIL‑Q‑9858A, MIL‑STD‑45208A, and MIL‑STD‑45662. Advanced inspection tools and calibrated equipment support consistent outcomes and documentation. Quality control extends through each step, from ID/OD grinding through final inspection, helping to maintain tight tolerances and repeatable results.

Industries Served

Precision grinding at Tri-Gon supports critical applications where accuracy, consistency, and surface finish are non-negotiable. The company works with engineers and manufacturers across a wide range of industries, delivering precision-ground components that meet strict performance and quality standards. Industries served include:

  • Aerospace and Defense: From structural supports to complex flight components, aerospace parts often require high-strength alloys and extreme dimensional accuracy. Tri-Gon’s ability to hold tolerances within .000025″ makes it a trusted source for mission-critical grinding work.
  • Medical Devices: Components for surgical instruments, diagnostic tools, and patient care systems often call for mirror-like finishes, exact geometries, and repeatable quality. Tri-Gon’s grinding processes—especially precision surface grinding and ID/OD grinding—support production requirements with reliable accuracy.
  • Industrial Equipment: Heavy-duty machinery, automated systems, and custom tooling rely on ground shafts, pins, and rollers. Tri-Gon provides dependable solutions for OEMs and custom machine builders requiring long-lasting, accurately sized parts.
  • Electronics and Communications: Miniaturized assemblies, high-frequency enclosures, and interface hardware benefit from tight tolerances and fine surface finishes. Centerless grinding service and other techniques support reliable performance in compact, high-speed systems.

Each part is produced with strict attention to detail, helping customers achieve reliable performance, part longevity, and manufacturing repeatability. Whether for high-speed motion, sterile environments, or complex assemblies, Tri-Gon’s grinding services deliver the precision required.

Why Choose Tri-Gon for Precision Grinding

Since 1973, Tri-Gon has built a reputation for precision, consistency, and service. As a family-owned company, it continues to work closely with engineers, buyers, and manufacturers who require tight tolerances and fine surface finishes. The team brings decades of experience to every project, with grinding capabilities that support both high-performance parts and tight production schedules.

Upload a drawing, share your requirements, or contact us to begin the quoting process. Whether it’s a prototype or a production run, Tri-Gon is ready to assist with your grinding needs.

From Prototype to Production Runs

Submit your RFQ today for prompt quotation.

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