Quality Control

The quality of our parts is the most crucial element of our success. We engineer and rigorously test all NewStar Parts to meet the material specifications, dimensions, functionality and longevity of OEM parts and components. In fact, our warranty meets or exceeds the OEMs’.

S&S’s Quality Control Laboratory (QCL), located in Schaumburg, Illinois, contains the most advanced equipment and technology available to ensure that NewStar gearing, airbrake, chassis and power steering components meet the industry's most stringent quality standards.


ISO Certification

S&S Truck Parts, LLC Schaumburg Location is certified as an ISO 9001:2015 organization. The certification is provided by Perry Johnson Registrars (PJR).. The certification of compliance with ISO 9001:2015 recognizes that the policies, practices and procedures of our company ensure consistent quality in the product and services we provide our clients. With this certification, our clients can be confident that S&S Truck Parts, LLC is dedicated to maintaining the highest efficiency and responsiveness in achieving our ultimate goal – guaranteed client satisfaction.

The following represents a sample of our state-of-the-art testing equipment:

Klingelnberg-Hofler CNC
(Computer Numeric Controlled)

Checks all gear tooth dimensions to ensure teeth are made correctly

Starrett CMM
(Coordinate Measuring Machine)

For checking lengths, locations, concentricity of diameters, flatness and more...

Starrett CNC Optical Comparator

For visual checks of forms, radius, lengths, heights and more...

Mitutoyo HR-500 Rockwell Hardness

Measures Rockwell hardness of various metals and other materials in thirty different hardness scales

Air Compressor Test Bench

Tests the compressor unloader functionality and checks for proper air pressure buildup, oil and coolant pressures, and system leakage.

E6 Valve Tester

Checks the supply pressure for leaks and to ensure the valve releases at the proper pressure.