1. Ngā āhuatanga hanganga rerekē
1. Mekameka ringaringa: Kāore he roera i roto i ngā wāhanga, ā, kei te hono tika te mata o te ringaringa ki ngā niho pītiti i te wā e hono ana.
2. Mekameka roera: He raupapa roera poto porotaka e honoa ana tetahi ki tetahi, e peia ana e te taputapu e kiia nei ko te sprocket.
E rua, ngā āhuatanga rerekē
1. Mekameka whakapū: Ina tere te oma o te mekameka whakapū, ka nui ake te tūponotanga ka uru te hinu whakahinuhinu ki te āputa i waenganui i te whakapū me te kakau titi, ā, ka pai ake te ātete ki te kakahu o te mekameka.
2. Mekameka roera: Ki te whakatauritea ki te whitiki tuku, kāore he reti reti, ka taea te pupuri i te ōwehenga tuku toharite tika, ā, he pai te pai o te tuku; kāore te mekameka e hiahia ki te kaha kume nui, nō reira he iti te kawenga ki runga i te rakau me te peera; kāore e paheke, he pono te tuku, he kaha te kaha ki te uta, ka taea te mahi pai i raro i te tere iti me te kawenga taumaha.
3. Ngā diameter pine rerekē
Mō ngā mekameka rakau he rite te teitei, he nui ake te diameter o te rakau pine i te mekameka roera, nō reira i te wā e tukuna ana, he nui te wāhi pa i waenga i te rakau pine me te pakitara o roto o te rakau, ā, he iti te pēhanga motuhake e puta ana, nō reira he pai ake te mekameka rakau. He pai mō te taiao mahi uaua o ngā miihini tīhiera me ngā kawenga taumaha.
Wā tuku: 25 o Ākuhata-2023