Lawe nui nā bearings poepoe hohonu i ka haawe radial a me ka haawe axial haʻahaʻa. Me ka liʻiliʻi liʻiliʻi o ka friction, ka wikiwiki palena kiʻekiʻe, ka laulā nui a me ka hui pū ʻana o ka hale; kūpono lākou no ka tractor, nā kaʻa, nā kaʻa, nā kaʻa, a me nā mīkini maʻamau, e like me ke ʻano o nā bearings i hoʻohana nui ʻia i ka ʻoihana mīkini.