Third Party Testing
Mevotech has developed a proprietary testing program integrating suspension dynamics with ISO (International Organization for Standardization), ASTM (American Society For Testing and Materials), MPIF (Metal powder industry federation), GMW( General Motors Worldwide) and SAE (Society Of Automotive Engineers) global standards and publications to validate our designs and deliver the performance you need.
The mandate of our testing program is to create parts that deliver high durability and a service life beyond that available from aftermarket competitors. Measuring results from tests such as Axial & Radial Play, Swing & Rotational Torque and Pull-Out and Push-Out Strength, is how Mevotech ensures the very best in part workmanship and resilience.
2-Pronged Testing Program
The Mevotech Testing Program is an ongoing commitment that validates that our parts perform as intended, achieve our stamp of approval and are worthy of your trust. Testing is divided into two key functional areas: Durability Testing and Compliance Testing.
We perform design and product validation which includes dimensional (Metrology), material, environmental, vehicle fitment and vehicle load simulation-based durability testing.
Mevotech durability testing is developed of SAE J 193-2012-10, SAE J 1367-2012-10 and Mevotech’s internal vehicle load recipe, which is based on real-life vehicle service load augmented by the factor of three to prove product in extremes conditions.
Mevotech Durability Testing is focused on the strength, performance and extended wear of our products. These tests validate the enhanced designs, upgraded components and advanced technologies we use to build better parts for you.
Axial & Radial Play
Our Axial and Radial Play tests use SAE J 193-2012-10 standards to measure resistance to loads that would cause the ball stud to move up and down or from side to side. This type of unwanted movement is a true measure of wear and durability and critical in determining expected service life.
Rotational Torque & Swing Torque Tests
Rotational Torque and Swing Torque tests use SAE J 193-2012-10 and SAE J 1367-2012-10 standards to determine the torque or force required to swing or rotate the ball stud in the housing. When the torque drops off, it indicates the ball joint is becoming loose and the part is failing, so this test is critical for measuring part durability and longevity.
Pull-Out & Push-Out Strength
These tests determine the amount of load or the point at which the ball pin would become separate from the housing. The tests are based on SAE J-193-2012-10. A continual perpendicular load is applied to the ball stud to determine how much force is required to completely separate the components. Pull-Out & Push-Out tests evaluate overall ball joint strength and validate the effectiveness of the assembly method.
Ball Joint water ingress testing
Mevotech ball joint boot covers have an application-specific design that prevents dust, water and debris from entering the ball joint improving durability. Mevotech boot water ingress test is based on ASTM D-6869, ASTM E-203 and GMW15459. Water with mud and slurry is directed on ball joint boot from nozzles with high pressure to test the boot’s sealing performance, abrasive strength and rigidity.
Environmental Corrosion Testing
We use both ASTM B-117 and ASTM D-1654 test standards to test our ball joints in extreme environmental conditions. Parts are subjected to variable temperature, high humidity, 100% RH and salty environment to accelerate the rusting process. This test evaluates the performance of the surface finishes applied to the housing and ball stud. At Mevotech we design ball joints to survive harsh wet, salty and sub-zero cold winter, and hot summer.
Mevotech Compliance Testing is focused on ensuring OE fit and function are met or exceeded. These tests are the foundation from which we begin our design process.
Ball Stud Yield
We use the SAE J-193-2012-10 Ball Stud Yield Test to measure ball stud strength until failure. Ball studs are designed to have an excessive amount of strength, many times greater than the loading and road forces the vehicle would experience in real-life driving conditions.
This test applies a progressive load to the ball stud to test its strength in normal and peak operating zones. In these areas, no permanent damage should occur and the ball stud should return to its original shape.
The load calculation for each of these zones considers the driving conditions associated with potholes, curb strikes, accelerated braking and similar real-world driving encounters. As the ball stud loads continue to increase throughout the test, there will be a point beyond the extreme zone where the ball stud will permanently deform. These loads are considered so extreme, they are not relevant.
Ball Stud Impact Strength
Ball studs must be designed to absorb large impact loads. Mevotech uses the SAE J-193-2012-10 Ball Stud Impact Test to measure the ball stud’s ability to withstand a severe impact. This test suspends a large weight several feet in the air and drops it directly on the exposed ball pin assembled in a simulated steering knuckle. After the impact has occurred, the ball stud is examined to ensure there are no cracks or fractures in the metal. It is critical that the ball pin perform exceptionally well during this test.
The material specification is pivotal for ball joint durability. At Mevotech, we use high strength steel and advanced heat treatment process to increase the fatigue life of our product. We use multiple OEM and international standards to evaluate chemical composition (ASTM E415-15), grain size ( ASTM E-112) inclusion rating ( ASTM E-45), Macro -Hardness ( ASTM B-962-17), and Micro-hardness ( ASTM E- 384-17) of housing and ball stud. We perform these tests with our manufacturing partners, third party testing partners and also at Mevotech in-house lab.
We use multidimensional metrology tools such as Faro make CMM machines with 3D scanning capability and best in industry surface finish machine and surface profilometer to reverse engineer parts. We use ISO-10360 to capture geometrical product specifications such as critical hardpoints and axis required to confirm OEM fit. We use ASME Y14.36M and ISO 1302 to measure surface finish parameters which are critical for the long service life of a ball joints such as a ball stud surface finish.
Element is one of the world’s leading independent providers of testing, inspection and certification services to a diverse range of industries where failure is simply not an option. Element’s team of over 6,700 experts operate from over 188 locations in more than 30 countries and deliver an extensive range of materials testing, product qualification testing, inspection, certification and advisory services to the global Aerospace, Automotive & Transportation, Fire & Building Products, Infrastructure & Environmental and Oil & Gas sectors. Element exists to help make certain that the materials and products they test and certify for their customers are always safe, quality, compliant and fit for purpose.
Link Engineering Company designs and manufactures precision test equipment, and provides comprehensive testing services for Transportation, Off-Highway, Industrial, and Civil Engineering. Headquartered in Plymouth, Michigan near Detroit, we maintain test laboratories and support facilities throughout the world. Where others either test your components or make test equipment, LINK does both. So you can test in our labs, buy your own system, or mix and match to fine-tune your solution. This unique flexibility delivers the most intelligent, cost-effective results.
Certified Testing Systems (2009) Inc.
CTS is a leading supplier of non-destructive testing methods such as Radiography (both X-ray and Isotope/film and digital), Magnetic Particle, Liquid Penetrant, Ultrasonic and Visual inspection testing. We also offer Positive Material Identification, Ferrite Testing and Hardness Testing. Our capabilities include testing services both in our lab and in the field by personnel qualified under one or more of CGSB, ASNT, ASNT SNT-TC-1A, CWB, AWS and PED 97/23. Our company has been ISO 17025 accredited (Cert. No. 2689.01) by A2LA since 2000.
In addition to independent lab testing, we also conduct in-house testing. Our FARO 3D machines are an integral part of our structural integrity analysis. We also utilize proprietary hub assembly testing equipment and tensile pull-out load testing.