The PL Type is a CAM BALANCER that incorporated CAM inside an index device for a fluctuation torque set off. It is compact and, easy to maintenance such as lubrication etc. It is very easy to handle. Although a cylinder and CAM follower are built inside a cylinder department, it can be arranged to 4 different position by a main body posture. Also, this index main body is an indexing machine which adopted a parallel CAM system, and ideal for a big coveyor drive, or for an index where suspension time is comparatively long.