In this study variable radius pulley is proposed, and the proposal should be applied to pulley of CVT. Variable radius pulley consists of two disks and sliding pins. Phase difference of two disks make a change pitch diameter. Therefore change speed is accomplished by changing pitch diameter of pulley. In this paper simulation for slot variation of rotary disk of the variable radius pulley was performed. Softwares for simulation are Pro/Engineer5 and Hypermesh11.0. The results of simulation are appropriate to put to practical use of the variable radius pulley

In this study variable radius pulley is proposed, and the proposal should be applied to pulley of CVT. Variable radius pulley consists of two disks and sliding pins. Phase difference of two disks make a change pitch diameter. Therefore change speed is accomplished by changing pitch diameter of pulley. In this paper analysis of rotating force for slot variation of the rotary disk of variable radius pulley was performed. The results of analysis are appropriate to put to practical use of the variable radius pulley.