Precision grinding for parts that can’t be “pretty close.”
For over four decades, we’ve specialized in high-tolerance ID grinding, OD grinding, rotary face grinding, and bevel gear grinding—supporting aerospace, defense, and industrial teams that need predictable results and documented verification.
Send this. Get a clear answer.
We quote fastest when requirements are explicit. This reduces back-and-forth and protects schedule.
Grinding built for high-consequence parts
The work is technical. The outcome is simple: parts that assemble right and perform right.
Bores and internal geometry with controlled size, form, and finish.
Shafts and journals with repeatable setups for concentricity and finish.
Seals and faces where flatness and surface finish are performance-critical.
Precision finishing for demanding geometry and mesh performance requirements.
What you can expect
A process plan, not a shrug. We confirm requirements up front, plan the setup, control the run with in-process checks, then document what matters.
- Aerospace components and assemblies
- Defense and high-reliability programs
- Industrial OEM and critical spares
- Prototype development and production runs
A family shop built on craft and follow-through
Our founder, Richard Duval, began his career in Chicopee, Massachusetts working alongside his father in a one-man, one-machine shop and continued his education through vocational training. In 1972, he moved his wife and young children to Orange County, California, building a reputation for work ethic and quality.
In 1980, Duval Precision Grinding was established and has continued to provide exceptional grinding services throughout the years. Today, Robert Duval continues the family tradition with over 30 years of hands-on grinding expertise and commitment to precision craftsmanship.
Skills taught at the machine to preserve craftsmanship and consistency.
In-process checks and final inspection focused on what affects performance.
Clear updates, realistic schedules, and no surprises.
We own the outcome—size, form, finish, and documentation.
Our Success Story
A quick look at how we approach high-tolerance grinding and verification.
Fast answers before the PO
Less back-and-forth, more forward progress.
Let’s get your part on spec
Prototype or production—send the print and requirements. We’ll respond with a clear plan, realistic timing, and documented verification aligned to your needs.
Clarity, control, and documentation
Secure Client Portal for quotes, job status, and invoices
Up-front process planning and verification
Straightforward communication end to end