| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin pulley for a V-ribbed belt, assuring efficient strength required for an outer diameter portion of the pulley. SOLUTION: The resin pulley for the V-ribbed belt has a plurality of V-shaped grooves 10 formed in the outer-diameter surface, extending in parallel to the circumferential direction. The V-shaped groove 10 has a groove bottom portion 6 formed in a circular shape of axial cross section so that a relationship between a circular radius R of the groove bottom portion 6 of at least the V-shaped groove 10 located at both ends in the axial direction and a groove pitch L satisfies the relation: 0.14<(R/L)<=0.25.
|
