Precision CNC Machining Services
Tight-tolerance manufacturing with inspection evidence
Tol. claim: ±0.005mm / ±0.00019in
CMM verification • GD&T support • CTQ-managed process
STEP / IGES / SLDPRT / PDF accepted
Precision Control Workflow (CTQ to CMM Verification)
ISO Certified
No MOQ
Free DFM review
Inspection documentatio
When Precision Is Non-Negotiable
Medical Devices
- Tolerances down to ±0.005 mm / ±0.00019 in
- Ultra-smooth surface finish (Ra ≤ 0.8 μm)
- Full CMM inspection reports
- Stable machining of Ti & stainless
- High batch consistency
Robotics
- Tight tolerance stack-up control
- Precision bearing & fit accuracy
- Rigid, lightweight structures
- High repeatability in motion parts
- Fast prototype → production
Automation
- Accurate mounting & datum control
- Flatness & parallelism ensured
- Durable for long-cycle use
- Consistent quality (1–500 pcs)
- Cost-efficient precision
Tolerance Capability
| Level | Tolerance (± inch/±mm) | Cost Factor | Typical Application |
| Standard | 0.003937 inch / 0.1 mm | 1.0x | Regular dimension |
| High Standard | 0.001969 inch / 0.05 mm | 1.2x | Clearance holes, structural brackets |
| Tight | 0.000787 inch / 0.02 mm | 1.5x | Bearing bores, locating pins |
| Precision | 0.000394 inch / 0.01 mm | 2.0x | O‑ring glands, press fits |
| High Precision | 0.000315 inch / 0.008 mm | 2.5x | High‑speed spindles, sealing surfaces |
| Ultra‑Precision | 0.000197 inch / 0.005 mm | 3.0x | Aviation, Aerospace, Rocket |
*Data sourced from industry standards. Batnon will provide verified capabilities upon request.
GD&T: The Language of Precision
Following ASME Y14.5 and ISO GPS standards, we interpret and machine to true position, flatness, profile, and run‑out controls.
| Control Type | Symbol | Typical Application | Verification |
| True Position | ⌖ | Hole patterns, fastener locations | CMM |
| Flatness | ⏥ | Sealing surfaces, mounting interfaces | CMM / surface plate |
| Parallelism | ∥ | Slides, guide rails | Dial indicator / CMM |
| Concentricity / Run‑out | ◎ / ↗ | Rotating shafts, bearing journals | V‑block + indicator |
GD&T + Datums
Precision is not just about tight tolerances—it’s about controlling how every feature relates to a defined reference. We establish functional datums based on real assembly conditions, ensuring critical features align, fit, and perform as intended. From machining setup to final CMM inspection, every dimension is verified against these datums to guarantee true positional accuracy—not just isolated measurements.
How We Verify Precision
1. CAD + Drawing Received
2. Identify CTQ Features from drawing
3. Choose Datums functional contact surfaces
4. Plan Setup Strategy minimize re-clamping
5. Machine Datums First create stable reference
6. In-process checks probing / critical dims
7. Final Inspection CMM / report level
8. Approval for Assembly fit/stack-up verified
Precision Verification Flow
Micro‑Guide: How to Read a CMM Report
Batnon offers CMM reporting using ZEISS / Hexagon / Mitutoyo CMMs.
Understanding your CMM report is key to quality assurance.
| Nominal | Deviation | Status |
| Ø12.500 | 0.005 | Pass |
| 15 | -0.01 | Pass |
| 8.75 | 0 | Fail |
| 8.75 | 0 | Pass |
Micro-Guide CMM
| Feature | Nominal | Tolerance | Measurement | Deviation | Status |
| Feature 1 | ±0.01mm | ±.01m | 0.21mm | 0.0036 | Passing |
| Tolerance 2 | 10.0mm | <.02m | 0.02mm | 0.0025 | Passing |
| Measurement | 0.3 mm | <6.025 | 0.23mm | -0.003 | Failing |
| Feature 3 | 20.7mm | <0.025 | 0.07mm | -0.006 | Failing |
Our precision CNC machining process
Inspection Deliverables
Every part is verified against defined datums and critical features.
You receive clear, traceable data — not just a pass/fail result.
CMM Inspection Report
Critical Features (CTQ)
Material Certificates
Datum-Based Measurement
Surface Inspection
FAI Report
Why Batnon for Precision CNC Machining Services
◆ Tolerances down to ±0.005 mm (±0.00019 in)
◆ Datum-driven machining strategy
◆ Full CMM verification on critical features (CTQ)
◆ Tolerance stack-up control
◆ Stable process from prototype to batch (1–500 pcs)
◆ Fast engineering response (DFM + feedback within hours)
◆ Inspection-first workflow
◆ Proven in robotics & automation assemblies
Precision Success Stories
Eliminated Assembly Misalignment in Robotic Joint Housing
A robotics startup faced alignment issues causing vibration and premature bearing wear. We redefined datums and controlled tolerance stack-up on critical fits.
Result: Smooth motion, stable assembly, and zero rework in final integration.
Achieved Perfect Fit for Multi-Component Automation System
Customer experienced installation mismatch across multiple components. We optimized flatness, parallelism, and hole positioning based on functional datums.
Result: Seamless on-site assembly without adjustment or shimming.
Maintained ±0.005 mm Stability Across Small-Batch Production
A precision component required tight tolerances across repeated batches. We implemented inspection-first workflow and full CMM verification on CTQ features.
Result: Consistent dimensional accuracy with zero deviation drift across production.
Your CNC Machining Questions, Answered
No MOQ, ISO9001 certified, and precision down to ±0.005mm/0.00019in –
everything you need to know before your first quote.
What tolerance can you achieve for precision CNC machining parts?
We typically achieve tolerances up to ±0.002 mm depending on geometry, material, and feature type. Critical dimensions are reviewed before production to ensure feasibility and stability across batches.
Which features are critical to function or assembly?
Identify mating surfaces, bearing fits, sealing areas, or alignment features.
This allows us to prioritize machining and inspection strategy.
What surface finish is required?
Specify Ra value if available, or indicate visual requirements (e.g. smooth surface, no tool marks, anodized finish).
Different requirements will determine finishing processes.
What material is specified for the part?
Include grade (e.g. Aluminum 6061, 7075, Stainless Steel 304, Q235).
Material affects machinability, achievable tolerance, and surface quality.
Do you have specific inspection requirements?
Select or define your needs:
- Standard QC
- Full dimensional report
- CMM inspection report
This determines inspection method and reporting scope.
What quantity do you need for this order?
Indicate prototype, small batch, or production volume.
Quantity impacts machining approach, fixture design, and cost optimization.
What file format will you provide?
For accurate quoting, we recommend:
- 3D file: STEP (.stp)
- 2D drawing: PDF/DXF with tolerances and notes
Are there any special requirements or risks we should be aware of?
Include assembly constraints, cosmetic expectations, or past issues (e.g. tolerance failure, surface defects).
This helps us identify and mitigate risks before production.
Turn Your Design Into Reality — Fast & Accurately
Upload your CAD. Get a fast online quote in 12h.
STEP / IGES / SLDPRT / PDF accepted
Precision CNC Machining at Batnon — Key Facts
Batnon offers precision CNC machining services for industries that require tight tolerances and verified accuracy, including medical devices, semiconductor equipment, robotics, and metrology.
Our standard tolerance down to ±0.005mm (±0.00019in). All critical dimensions are verified using CMM (Coordinate Measuring Machine) inspection in a temperature‑controlled environment.
We support GD&T controls per ASME Y14.5 and ISO GPS standards, including true position, flatness, parallelism, concentricity, and run‑out.
Every precision order can include full inspection documentation: CMM reports, first article inspection (FAI), material certificates (CoC), and certificate of conformance.
We have no minimum order quantity (MOQ). We accept single‑piece prototypes as well as production runs.
Our quality system is aligned with ISO 13485 standards for medical device manufacturing. Free DFM (Design for Manufacturability) review is included with every quote.