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Expert CNC Precision Machining Accuracy Verification & Calibration Support

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.

CNC machining center undergoing precision calibration with laser interferometer equipment

Our CNC Calibration & Verification Services

Comprehensive diagnostic and calibration solutions that verify machine accuracy, identify wear patterns, and maintain NIST-traceable precision for reliable production performance.

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.

Ballbar Testing

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.

Rotary Axis Calibration

Measure angular positioning accuracy, repeatability, and alignment of rotary tables and trunnions using Renishaw's Rotary Calibration System to ensure multi-axis machining precision.

Surface Plate Verification

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.

Electronic Leveling

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.

Calibration Training

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.

Service Process

Our 5-Step Verification Process

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

Proven Results

Trusted By Manufacturers

Join Portland-area manufacturers who rely on our calibration expertise to maintain precision and minimize downtime.

"I have worked with Mr Sarkinen on a job in Portland He is a Highly Skilled, Knowledgable Professional. I would definitely recomend him for all your Machine Tool Calibration Metrics. Sincerely Curtis Page Naughtellis CNC Service"

fab c
fab c

"As plant manager at Triad, I am always looking for ways of testing and measuring the condition of our large machines. Our outside repair tech suggested that I have Sarkinen Calibrating run their Ball Bar Test on all of our machines to show if we had any critical wear issues..."

Mike Mills

"This guy knows his stuff. Would definately recommend! Friendly good people!"

Lucas Pukas
Lucas Pukas

"I have worked with Mr Sarkinen on a job in Portland He is a Highly Skilled, Knowledgable Professional. I would definitely recomend him for all your Machine Tool Calibration Metrics. Sincerely Curtis Page Naughtellis CNC Service"

fab c
fab c

"As plant manager at Triad, I am always looking for ways of testing and measuring the condition of our large machines. Our outside repair tech suggested that I have Sarkinen Calibrating run their Ball Bar Test on all of our machines to show if we had any critical wear issues..."

Mike Mills

"This guy knows his stuff. Would definately recommend! Friendly good people!"

Lucas Pukas
Lucas Pukas

"I have worked with Mr Sarkinen on a job in Portland He is a Highly Skilled, Knowledgable Professional. I would definitely recomend him for all your Machine Tool Calibration Metrics. Sincerely Curtis Page Naughtellis CNC Service"

fab c
fab c

"As plant manager at Triad, I am always looking for ways of testing and measuring the condition of our large machines. Our outside repair tech suggested that I have Sarkinen Calibrating run their Ball Bar Test on all of our machines to show if we had any critical wear issues..."

Mike Mills

"This guy knows his stuff. Would definately recommend! Friendly good people!"

Lucas Pukas
Lucas Pukas
The Sarkinen Difference

Why Choose Sarkinen Calibrating?

We deliver NIST-traceable accuracy with the local responsiveness and operational insight that keeps your machines running reliably.

Local Expertise

Faster response times throughout Portland and SW Washington than out-of-area providers, minimizing production disruption.

Operator Perspective

Founded by a former machine operator who understands production realities and delivers solutions beyond basic equipment maintenance.

NIST-Traceable Precision

Measurements accurate to 1.0 parts per million, exceeding the 10:1 ratio required for proper calibration with full traceability.

Comprehensive Solutions

Complete diagnostic capabilities from laser interferometry to ballbar testing, surface plates, and rotary axis verification under one provider.

Meet the Portland Team

Built on real-world machining experience and calibration expertise.

Larry

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.

Frequently Asked Questions

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?

Questions About Your Machine's Accuracy?

Talk to our calibration experts for a free consultation on verification services for your equipment.

Serving Portland & SW Washington

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

Need Calibration Service in Your Area?

Contact us to discuss service availability and response times for your location.

Traceable & Trusted

Awards and Recognition

NIST Traceability certification logo

NIST Traceability

All measurements traceable to National Standards

Five star customer rating icon

5-Star Rating

Perfect customer satisfaction across all reviews

Local business expertise badge

Local Expertise

Founded by experienced Portland-area machine operator

Ready to Verify Your Machine Accuracy?

Contact us for a consultation. We'll discuss your calibration needs and recommend the most effective approach for your equipment and production requirements.

Contact Us Today

For immediate assistance, feel free to give us a direct call at (360) 907-3058 You can also send us a quick email at