Home

About AAT&D

AAT&D Four-Ball Test Machine

4-Ball Test Description (PDF)

Testing Services

FAQs

Contact Us

AAT&D Sample Reports

Data sheets from Ann Arbor Testing & Development, Inc., four-ball tests are accompanied by full written reports. The first example can be seen to have a relatively low friction trace after the initial one-hour break-in period.



Home | About AAT&D | AAT&D Four-Ball Test Machine | 4-Ball Test Description (PDF)

Testing Services | FAQs | Contact Us