Plastic waje spherical bearing ciki da waje zoben kayan yau da kullun amfani da injiniya roba a matsayin albarkatun kasa, wasu kuma amfani da wear juriya karfe a matsayin albarkatun kasa. Jikin madaidaiciya gabaɗaya yana amfani da kwallon gilashi, bakin karfe da kuma kwandon yumbu. Maintainer zaɓi injiniya roba da fiber gilashi karfafa da nylon 66 (PA66) da PE ko mafi girma yi. High daidaito roba bearings yawanci amfani da daidaito CNC machining, bearings ne mafi kyau a juyawa daidaito da kuma haƙuri. Yawancin filastik bearings na gargajiya suna amfani da ƙirar allura kai tsaye, saboda sauƙin ƙirar da ke da babban farashi. (Wheels yawanci amfani da wannan tsari) dace da amfani a lokacin da low juyawa gudun, matsakaicin kaya. Ana amfani da su sosai a masana'antar kayan wasa, masana'antar kayan aikin motsa jiki, masana'antar kayan daki, masana'antar injunan likita, masana'antar talla, masana'antar da ke da lalata mai rauni.



Babban kayan daban-daban injiniya roba ne: PI (polyamide), PEEK (polyether ether ketone), UHMW-PE (ultra-high kwayoyin nauyi polyethylene), PVDF (polyfluoroethylene), HDPE (high yawa polyethylene), PTFE (polytetrafluoroethylene), POM (polyformaldehyde), PP (polypropylene), PBT (polybenzene butadiene ester), PAA66 (nailon), da sauransu