Refer to X series of cyclodial speed reducers of features and pruposes of WBseries of miniature cycloidal pin wheel speed reducers ,which are smaller and lower power.  Besides all features of commonspeed reducers ,for lubricating grease is used in lubrication,oil leakage is unlikely on this series of speed reducers.Meanwhile,they can be installed in and directions,atany angles according to user's requirements.