Lifeloc Technologies had a 20% failure rate in their passive breathalyzer pump assembly due to faulty lead screw assemblies (LSA). They developed an automated process to mitigate bearing failure by: 1) Testing the friction of the LSA before and after an automated press fit using a graphical user interface controlled system, to quantify the difference between 'good' and 'bad' LSA's. 2) The automated process uses a press fit fixture, XY track, and component fixture to align and press fit the bearing and LSA within 0.0009" accuracy to replace the manual arbor press. 3) A friction test fixture then spins the LSA and bearing to measure friction, indicating how detrimental the