Linear Calibration
Verify positioning accuracy, repeatability, straightness, and squareness across full axis travel using Renishaw Laser Interferometer with 1.0 PPM precision, traceable to NIST standards.
Ensure your CNC machines deliver consistent, traceable accuracy with comprehensive verification and calibration support from Sarkinen Calibrating. From laser interferometry to ballbar testing, we validate machine performance to NIST standards, helping Portland-area manufacturers minimize downtime, meet warranty specifications, and maintain the precision required for demanding production environments.

Comprehensive diagnostic and calibration solutions that verify machine accuracy, identify wear patterns, and maintain NIST-traceable precision for reliable production performance.
Verify positioning accuracy, repeatability, straightness, and squareness across full axis travel using Renishaw Laser Interferometer with 1.0 PPM precision, traceable to NIST standards.
Rapid machine health assessment using Renishaw QC20-W Ballbar to identify backlash, servo mismatch, axis reversal errors, and squareness issues affecting circularity and overall performance.
Measure angular positioning accuracy, repeatability, and alignment of rotary tables and trunnions using Renishaw's Rotary Calibration System to ensure multi-axis machining precision.
Maintain reference plane accuracy through expert leveling and flatness verification using Moody Plot analysis to ensure consistent inspection and layout work as plates wear over time.
Detect and correct pitch and roll errors in machine beds, guideways, and structures using Mahr-Federal Electronic Level to identify alignment issues from installation or foundation movement.
Hands-on training for CNC operation, CAM software, laser interferometry, and ballbar systems tailored to your equipment, helping teams perform in-house diagnostics and improve machine utilization.

Pre-Service Consultation & Machine Assessment
We begin with a detailed discussion of your machine history, production challenges, and accuracy concerns. This allows us to recommend the most appropriate calibration approach—whether you need comprehensive linear verification for warranty validation or quick ballbar diagnostics to troubleshoot recent quality issues affecting your Portland-area production schedule.
On-Site Setup & Equipment Installation
Precision Data Collection & Testing
Analysis, Reporting & Recommendations
Follow-Up Support & Ongoing Monitoring
Join Portland-area manufacturers who rely on our calibration expertise to maintain precision and minimize downtime.
We deliver NIST-traceable accuracy with the local responsiveness and operational insight that keeps your machines running reliably.
Faster response times throughout Portland and SW Washington than out-of-area providers, minimizing production disruption.
Founded by a former machine operator who understands production realities and delivers solutions beyond basic equipment maintenance.
Measurements accurate to 1.0 parts per million, exceeding the 10:1 ratio required for proper calibration with full traceability.
Complete diagnostic capabilities from laser interferometry to ballbar testing, surface plates, and rotary axis verification under one provider.
Built on real-world machining experience and calibration expertise.
Founder
Larry's journey from machine operator to calibration specialist gives Sarkinen Calibrating a unique perspective on manufacturing challenges. He founded the company because he understood that effective calibration is about more than just checking equipment—it's about providing solutions that directly impact production quality and efficiency. His hands-on experience operating machines means he approaches every calibration service with an understanding of what manufacturers actually need: predictable accuracy, minimal downtime, and confidence that their equipment will deliver promised tolerances consistently. Larry built Sarkinen Calibrating on the principle that calibration should serve the operator and production manager, not just satisfy a compliance checklist. That operator-first mindset shapes how the company approaches customer service, communicates results, and helps Portland-area manufacturers maintain the precision their businesses depend on.
What is CNC precision machining?
CNC precision machining uses computer-controlled machine tools to manufacture parts with tight tolerances, typically within thousandths of an inch or better. The process requires machines to move accurately and repeatably along multiple axes to cut, drill, or mill material to exact specifications.
What is high precision CNC machining?
How precise is CNC machining?
How often should CNC machines be calibrated?
What does laser interferometry calibration cost?
Can you calibrate machines during production shifts?
What is ballbar testing and why is it important?
Do you provide calibration certificates?
Talk to our calibration experts for a free consultation on verification services for your equipment.
Local calibration support with faster response times than out-of-area providers, plus capability to serve customers beyond our primary service area.
Portland & SW WA
Primary Service Area
Same-Week Service
Response Time
5.0 Stars
Customer Rating
Contact us to discuss service availability and response times for your location.
All measurements traceable to National Standards
Perfect customer satisfaction across all reviews
Founded by experienced Portland-area machine operator
Contact us for a consultation. We'll discuss your calibration needs and recommend the most effective approach for your equipment and production requirements.
For immediate assistance, feel free to give us a direct call at (360) 907-3058 You can also send us a quick email at
For immediate assistance, feel free to give us a direct call at (360) 907-3058 You can also send us a quick email at