me pēhea te tatau i te waeine taputapu

Hei tatau i tekōwae taputapu, me mōhio koe ki tete papa porowhita (pp)tete whānui o te papa (dd)me tete maha o ngā niho (zz). Ko te kōwae (mm) he tawhā paerewa e tautuhi ana i te rahi o te niho taputapu, ā, he mea nui hoki mō te hoahoa taputapu. Kei raro nei ngā tātai me ngā mahi matua:

1. Te Whakamahi i te Pitch Porowhita (pp)

Ka tatau tika te kōwae mai i tepapa porowhita(te tawhiti i waenga i ngā niho tata i te porowhita pitch):

m=pπm=πp;

Tauira:
Mena ko te p=6.28 mmp=6.28mm, kātahi:

m=6.28π≈2 mmm=π6.28≈2mm

2. Te Whakamahi i te Diameter o te Pitch (dd) me te maha o ngā niho (zz)

Ko te whanaungatanga i waenga i te diameter o te pitch, te module, me te maha o ngā niho ko:

d=m×z⇒m=dzd=m×z⇒m=zd;

Tauira:
Mena he z=30 te taputapuz=30 niho me te whānui o te papa d=60 mmd=60mm, kātahi:

m=6030=2 mmm=3060=2mm

3. Te Whakamahi i te Diameter o Waho (DD)

Mō ngā taputapu paerewa, ko tete whānui o waho (DD)(te diameter mai i te pito ki te pito) e pā ana ki te kōwae me te maha o ngā niho:

D=m(z+2)⇒m=Dz+2D=m(z+2)⇒m=z+2D;

Tauira:
Mena ko D=64 mmD=64mm me z=30z=30, kātahi:

m=6430+2=6432=2 mmm=30+264=3264=2mm

Ngā Tuhipoka Matua

Ngā Uara PaerewaMe whakaawhiwhi tonu te kōwae kua tatauhia ki te uara paerewa tata rawa atu (hei tauira, 1, 1.25, 1.5, 2, 2.5, me ētahi atu) kia hototahi ai.

Ngā Wāhanga: Ka whakaatuhia te kōwae i roto imirimita (mm).

Ngā tono:

Ngā kōwae nui ake (mm) = niho kaha ake mō ngā kawenga taumaha.

Ngā kōwae iti ake (mm) = ngā taputapu kiato mō ngā mahi tere-nui/kawenga-iti.