ʻO nā wēlau o ke koʻokoʻo he poʻo maka me ka shank integral e hana ana i hale no kahi bearing maʻamau poepoe. Hoʻohana nui ʻia lākou ma nā wēlau o nā piston hydraulic a pneumatic paha e hoʻohui i ka cylinder i kahi ʻāpana pili. ʻO ka Rod End kahi bearing paheʻe poepoe e hoʻokomo ana i kahi apo o loko poepoe me ka pololei a me ka paʻakikī e like me nā bearings pōpō kila.
