This study is to investigate the cause of the malfunction of the ground tracked combat vehicle rotating roller and set future direction of improvement. The integrity of the initially used plate and rotating roller was evaluated. As evaluation methods, mechanical property test, radiographic test and size checking test were performed. PA66, PA12, PET, and POM were selected among polymer materials and tested for water absorption rates. Through mechanical property test and radiographic test, the materials used initially were identified to be sound. In the evaluation of the selected four polymer materials, it was confirmed that the PET was excellent in the mechanical properties and the water absorption rate. PET is excellent in mechanical properties and water absorption.

ABSTRACT
 1. 서 론
 2. 본 론
  2.1 회전 롤러 구동불가 현상 분석
  2.2 회전 롤러 재질 분석
  2.3 회전 롤러 수분 흡수율 시험
 3. 결 론
 References

• 전병준(Defense Agency for Technology and Quality) | B. J. Jeon Corresponding Author
• 손기중(Defense Agency for Technology and Quality) | G. J. Son
• 김현민(Defense Agency for Technology and Quality) | H. M. Kim
• 이준호(Defense Product Engineering team, Hyundai Rotem) | J. H. Lee