ʻO nā bearings wili tapered he ʻehā mau ʻāpana e pili ana kekahi i kekahi: ke cone (apo o loko), ke kīʻaha (apo o waho), nā wili tapered (nā mea wili) a me ke cage (mea paʻa wili). Hoʻohana nā bearings wili tapered medium- a me steep-angle metric series i ke code kihi pili "C" a i ʻole "D" ma hope o ka helu bore, ʻoiai ʻaʻohe code i hoʻohana ʻia me nā bearings kihi maʻamau. Hoʻohana nui ʻia nā bearings wili tapered medium-angle no nā ʻau pinion o nā kia ʻokoʻa i nā kaʻa.
