Certified Service Company of Ohio

Internationally Accredited Surface Plate Calibration, Cleaning, and Repair
scroll ANAB Logo
Certified and Accredited ISO 17205







     At Certified Service Company of Ohio, owner Dave Mardavich and staff take immense pride in our more than four decades of metrology experience and ISO/IEC 17205 certification. We understand the need for precision in the calibration, repair and cleaning of your granite surface plates, squares and blocks.

     Our qualified metrologist utilises the most advanced calibration equipment and technology to guarantee exact measurements every single time, allowing you to be assured that the calibration will be perfectly executed right from the start.

     Moreover, all the work is carried out in your facility! Our sophisticated apparatus and ISO/IEC 17205 accreditation ensure that your granite surface plates and blocks are calibrated with utmost precision. Nevertheless, our dedication to providing you with the most excellent customer service and personalised care is what really sets us apart from others.

     We know that your time is invaluable, which is why we always work to offer swift and reliable service. Regardless of whether you're located in Ohio, New York, New Jersey, Tennessee, North Carolina, South Carolina, Alabama, Georgia, or Texas, or somewhere else, we're thoroughly equipped to tackle all your granite plate calibration and repair needs.

     Finally, we also offer surface plate cleaning services that keep your equipment in top condition.Trust us to be your go-to solution for all your granite surface plate calibration, repair, and cleaning needs.

     Why not phone us todayat (330) 725-6318 or click "Contact Us" to send us an email?
Trust Certified Service Company of Ohio to take care of all your granite surface plate calibration, repair and cleaning requirements! Our ISO/IEC 17205 certification ensures that we satisfy or exceed the international accepted standard.

Why Certified Service Company is the BEST Choice for Your Company!

ANAB Logo
We are Internationally Accredited and Certified to ISO/IEC 17025

Adobe Acrobat LogoClick to Download Our CERTIFICATE OF ACCREDITATION in PDF Format Certificate and Scope Accreditation Adobe Acrobat LogoClick to Download Our SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 in PDF Format

If you want accurate and reliable granite plate calibration services, choose Certified Service Company of Ohio, where we adhere to internationally recognized standards.

 ISO/IEC 17025 is an essential international standard that has to be adhered to - this establishes the proficiency criteria for testing and calibration laboratories, guaranteeing reliability and uniformity.

Opting for an ISO/IEC 17025-accredited laboratory allows you to gain the following benefits:

1. Heightened accuracy: Labs following ISO/IEC 17025 protocols are regularly monitored and tested for proficiency, making certain that their devices are precisely calibrated and consistent.
2. Enhanced Trust: When you employ a calibration provider who is up to par with international standards, you can rest assured that the measurements obtained during the calibration process will be dependable every time.
3. Advanced traceability: An accredited lab makes sure that all readings taken during the calibration process are traceable to national or international measurement benchmarks.
4. Minimized risk: Choosing an ISO/IEC 17205 accredited laboratory reduces the risk of defective calibrations which can result in costly product recalls and machinery damage.
5. Common acceptance: Numerous industries need or heavily advocate ISO/IEC 17025 accredited calibration services, an international standard. With ISO/IEC 17205 accreditation, you're showing your loyalty to adhering to industry expectations.
6. Statuitory compliance: Meeting international standards like ISO/IEC 17025 is compulsory in a variety of industries. Picking an accredited provider will make certain that all regulations are complied with. If you desire precise and dependable granite plate calibration services, turn to Certified Service Company of Ohio, where we always stick to international standards.

Certified Service Company of Ohio  has ISO/IEC 17025 accreditation of both Certification and Scope

Certified Service Company of Ohio, LLC About Certified Service Company of Ohio

Owner, President and metrologist Dave Mardavich runs this second-generation family granite plate calibration business, combining experience, the right tools and an unwavering commitment to excellence. We combine that commitment with modern technology and a business model focused on personal, individual service and fair pricing to meet your own exacting standards. In a time when some companies are decreasing their level of service to maximize profits, we still believe the treating each client individually is still desirable. When your granite surface plates need calibration, repair, cleaning, or machining, choose the company so many industry leaders have already trusted to work on their surface plates.


Granite Master Angle
Granite Master Angle

When your Master Granite Angles need calibration, our certified metrology experts perform the work on-site at your location. As an ISO Certified and Accredited company, you can be confident that our calibrations and repairs of you granite plate, granite tables and granite squares will be addressed by our metrologist who has over 40 years' experience and has met the exacting standards of ISO 17205


Autocollimator
Repair and Resurfacing of Granite Surface Plates, Squares, Tables and Angles

As the foundation upon which your dimensional measurements rely, you and your company can trust Certified Service Company of Ohio  and our over  40 years of calibration, repair and metrology experience, assuring you of product integrity, giving you quality work and value with the same attention to detail that you provide to your customers. Our many years of experience ensure the granite items we work on receive the most accurate and precise calibration, resurfacing, repair, and machining of your granite surface plates, granite master angles, granite tables and granite blocks.

Examples of Granite surface plates, squares, tables, and angles
Granite Surface Plates, Squares, Tables and Angles

Repair Chipped Granite Surface Plates/Granite Plates,  Granite Blocks, and machine Damaged Granite Tables, also known as granite plates or granite blocks. Obtain Actual Readings on Tiny Granite Surface Plates/Granite Angles/Granite Tables.




Let us be Your Company's Solution to Your Granite Calibration and Repair Needs

Professional, reliable, prompt and courteous service, on-site right in your plant and personalized to your specific situation and needs. There are no better reasons to choose  Certified Service Company of Ohio for your next granite calibration or repair needs.
Scroll Down








Just some of the many companies that have trusted

Certified Service Company of Ohio

for their Granite Surface Plate and Granite Block calibration or repair needs.









NASA Logo General Motors Corporation Logo Alcoa Corporation Logo General Electric Logo

Magellan Aerospace Logo Cummins Logo GE Oil and Gas Logo Dresser-Rand Logo Cooper Tires Logo

Corning Logo Pratt and Whitney Logo Smith Aerospace Logo Wyman Gordon Logo
Scroll Down









Primary Areas Served

















We regularly serve these states- Near You

New York State OutlineNew York  New Jersey State Outline New Jersey  Ohio State OutlineOhio  Tennessee State OutlineTennessee    North Carolina State OutlineNorth Carolina

South Carolina State OutlineSouth Carolina    Texas State Outline Texas    Mississippi State Outline Mississippi    Alabama State Outline Alabama    Georgia State Outline Georgia


Are you in search of a trustworthy and dependable calibration and repair service for granite surface plates? Look no further than Certified Service Company of Ohio

Boasting four decades of metrology expertise, our professionals use only the latest technology and utmost attention to detail to make sure that all granite plates, angles, and blocks are completely calibrated, inspected, and restored. We rigorously stick to reliable steps and protocols to offer precise evaluations and services that meet all of your requirements.

No matter if you need assistance with calibration, refurbishment, or cleaning of your granite plates, our experts have you taken care of. Contact us today to learn more about how we can help you keep your granite surface plates in top condition!



Scroll Down

Surface Plates- Why Granite?
WWII American Bomber Showing Bombs Being Loaded
Manufacturing on Steroids
America's manufacturing might was key to the Allied victory in World War II. By the beginning of 1944, the output of American factories was twice that of all the Axis nations, as manufacturers everywhere shut down normal operations and retooled for wartime


U.S. Workers at Munitions Manufacturing Assembly Line
Production in Wartime
Automakers, for example, produced their last passenger cars on February 10, 1942. They then made aircraft — Chrysler built Martin designs, Ford made planes for Consolidated Aircraft, and General Motors produced aircraft for North American. In addition to airplanes and aircraft parts, the automakers also manufactured trucks, tanks, marine diesels, guns, and shells.


WWII Scrap Drive
1940s "Recycling"
Shortages of materials, such as iron and steel and rubber prompted scrap drives. Today, we call this recycling.

Women Building WWII Airplane
from iron and steel to granite - thanks to american ingenuity

Materials and other resources were often hard to come by during the war. Just as it had during the First World War, Kingsbury once again halted its toy production to turn its attention to machine tools. The materials the toys were fashioned from — heavy gauge steel, flat steel springs, soft rubber, enamel paints, and automotive lacquer — were all needed for the war effort. And since toys were not high on the government's list of requirements, Kingsbury concentrated on making machinery to produce rifle bolts and shell casings.

Prior the Second World War, the tool and die industry used surface plates made from steel or cast iron, that were meticulously scraped flat by skilled craftsmen. But not long after the outbreak of WWII ,  the demand for steel and cast iron, both of which were crucial to the manufacture and production of ships, tanks, military vehicles, and munitions, (leading to their classification as "strategic materials") made iron and steel all but impossible to procure.
Sculptor Seth Velsey with the bust he created of Wilbur Wright
Seth M. Velsey with his bust of Wilber Wright

Faced with this challenge, one enterprising machinist, whose name is now lost to history, contacted a sculptor in Dayton, Ohio, named Seth M. Velsey (1903-1967). Velsey started the Velsey Granite Surface Plate Co., hiring, among others, Ivan Rahn. Ivan's father, Rudolph, was a mechanical engineer who thought he could improve the process. He noted that the precision measurement references were produced by a sculptor with little engineering knowledge, who was working for a monument company. The machinist asked Velsey if he could supply a "very flat tombstone" for use as a makeshift substitute surface plate. Velsey said he could, and soon other machinists and tool and die workers came knocking at his door with their own orders for these "tombstones".

In the meantime, Ivan started working with the local monument company that had originally employed Velsey. The company had set up its own surface plate division and named it Herman Stone Co. While Ivan was working there, he and his father perfected techniques for producing surface granite plates. Their plan was to go into business for themselves, but first they had to practice a bit of subterfuge. When Ivan's coworkers were observing him, he would incorrectly lap a piece, then quickly correct the surface when no one was watching. In 1941, however, Ivan and his father started the Rahn Granite Surface Plate Company.

The job of keeping granite surface plates, granite surface tables, and granite blocks accurately calibrated and in good repair is best performed by an experienced, trusted ISO/IEC 17205 Certified and Accredited company, like Certified Service Company of Ohio

The Mardivich family, first the father, then the sons, have always done quality work for a fair price, earning them a well deserved reputation for quality, reliability, and honesty. This has afforded them opportunities to service both nationally and internationally recognizable brands, as well as smaller shops, consistently giving them all the same personal attention and care that they have become known for throughout this industry.


Scroll Down
For additional information, we invite you to check out these links: