Precision Grinding
Where Geometry Matters
Duval Precision Grinding is a grinding-first machine shop specializing in tight-tolerance finishing for assemblies where fit, alignment, and surface integrity define performance — not just size on a print.
Datum strategy, functional surfaces, and verification planning.
Process control built around the characteristics that drive function.
Precision Grinding Services
Detailed capability sections below. If you don’t see your exact process, contact us — we’ll review your print and recommend the best approach.
Internal Diameter Grinding for Functional Bores
ID grinding is used when bore geometry controls fit, sealing, alignment, and rotating performance. We plan the process around the functional datum strategy so the results perform in assembly — not only on the CMM.
Typical Parts
- Bushings, sleeves, liners
- Bearing bores and seats
- Valve body / hydraulic bores
- Precision housings
Controlled Characteristics
- Size, taper, and straightness
- Roundness and cylindricity
- ID to OD concentricity / coaxiality
- Surface finish for sealing and wear
Outer Diameter Grinding for Runout & Surface Integrity
OD grinding is essential for shafts, journals, and cylindrical features where runout and finish drive fatigue life, bearing performance, and assembly smoothness.
Typical Parts
- Shafts and journals
- Pins, rollers, spindles
- Between-centers cylindrical parts
- Repair and salvage grind-to-size
Common Controls
- Total Indicator Runout (TIR)
- Cylindricity and straightness
- Concentricity to datum bores
- Post-plating / coating cleanup
Rotary Face Grinding for Flatness & Parallelism
Rotary face grinding controls the surfaces that drive stack-up height, sealing, and thrust performance — ideal for thickness uniformity across volume runs.
Typical Parts
- Spacers and shims
- Thrust washers
- Seal faces
- Stack-up critical components
Controlled Characteristics
- Flatness
- Parallelism
- Thickness variation
- Surface finish for sealing
Bevel Gear Grinding for Contact Pattern & Reliability
Bevel gear grinding refines tooth geometry to improve load distribution, noise characteristics, and service life in critical power transmission systems.
Supported Gear Types
- Hypoid gears
- Spiral bevel gears
- Zerol gears
- Matched gear sets
Primary Focus
- Contact pattern refinement
- Load distribution improvement
- Noise behavior control
- Functional verification strategy
Additional Capabilities & Support
Many customers come to us for tight-tolerance finishing after turning, milling, heat-treat, or coating. These support items help ensure the grind process produces predictable assembly results.
Repair & Salvage Grinding
Bring parts back into spec when size, wear surfaces, or runout need recovery.
Coated / Plated Grind-to-Size
Support for post-plating cleanup and controlled grind allowances for coatings.
Prototype to Production
Fast iteration on functional surfaces with repeatable process planning for scale.
Datum Strategy Support
Early alignment between print datums, functional requirements, and inspection approach.
Quality & Inspection
Tight tolerance grinding only matters if it’s verified correctly. We use calibrated measurement tools and documented inspection methods aligned to the characteristics that drive function.
- Calibrated micrometers, bore gauges, and indicators
- Surface finish verification using profilometer (down to 8 µin Ra)
- Traceable standards and documented measurement practices
- Inspection report available upon request
RFQ Checklist
Faster quotes and better outcomes start with clean inputs.
- Print or model with critical features and tolerances
- Material and condition (including any heat treat)
- Plating or coating details if applicable
- Quantity and required lead time
- Special inspection or documentation requirements
How We Work
A repeatable process reduces surprises. This is how we turn your print into predictable assembly performance.
Print Review
Identify functional surfaces, datums, and tolerance stack risks before we grind.
Process Plan
Select workholding and grind strategy based on geometry, material condition, and inspection needs.
Grinding & Control
Control heat, geometry, and finish while monitoring the characteristics that drive function.
Verify & Deliver
Inspection verification, documentation when required, and consistent shipment readiness.
FAQ
Quick answers for engineers and buyers sourcing precision grinding services.
What tolerance can you hold?
What surface finish can you achieve?
Do you grind coated or plated parts?
What do you need to quote accurately?
Ready for precision you can measure?
Partner with Duval Precision Grinding for consistent accuracy, quick turnaround, and proven reliability.