| 摘要 |
PURPOSE:To execute a test in a state of only rolling which causes no slide by providing a discoid test-piece which is fitted to the outside circumferential part of a spindle connected to a driving part and being freely rotatable around the axial core, and rotates as one body with said spindle. CONSTITUTION:A spindle 22 having a parallel axial core to pulley shafts 14, 15 whose upper end part is supported by a needle-like roller bearing 20 and whose lower end part is supported by a radial ball bearing 21 is provided freely rotatable around the axial core in a ring box 13. Also, a test-piece 28 formed in the shape of a disk is fitted to the spindle 22, joining the lower end face to the upper end face of a timing pulley 23, and it is formed so as to rotate as one body with the spindle 22. According to said constitution, a test in a state of only rolling which causes no slide can be executed. |
