1. Yawan hakora Z Jimillar adadin hakora na akayan aiki.
2, modulus m Samfurin nisan hakori da adadin hakora daidai yake da kewayen da'irar rarrabawa, wato pz= πd,

inda z lambar dabi'a ce kuma π lamba ce mara hankali. Domin d ya zama mai hankali, yanayin da p/π yake da hankali ana kiransa modules. Wato: m=p/π
3, Diamita na da'irar mai nuni d girman haƙorin kayan aikin an ƙaddara bisa wannan da'irar d=mz kwafin cikakken rubutu 24, diamita na saman da'irar d. Kuma diamita na tushen da'irar de cikakken karatun allo daga tsarin lissafi na tsayin crest da tsayin tushen, ana iya samun tsarin lissafin da'irar da'ira da diamita na tushen tushe:
d.=d+2h.=mz+2m=m(z+2)

Mafi girma da modules na dabaran, da mafi girma da kuma kauri hakora, idan yawan hakora na

kayan aikitabbatacce ne, mafi girman girman radial na dabaran. Modular jerin ma'auni an tsara su bisa ga bukatun ƙira, masana'antu da dubawa. Ga gears masu haƙoran da ba madaidaici ba, modules ɗin yana da bambanci tsakanin modules na al'ada mn, ƙarshen modules ms da axial modules mx, waɗanda suka dogara ne akan rabon farawar nasu (na al'ada, farar ƙare da axial pitch) zuwa PI, kuma suna cikin millimeters. Don bevel gear, module ɗin yana da babban ƙarshen module ni, matsakaicin module mm da ƙaramin ƙarshen module m1. Don kayan aiki, akwai madaidaicin kayan aikin modulus mo da sauransu. Ana amfani da daidaitattun kayayyaki. A cikin metric gear drive, tsutsotsin tsutsa, bel ɗin bel ɗin aiki tare da ratchet, haɗin gear, spline da sauran sassa, ma'auni modules shine mafi mahimmancin ma'auni. Yana taka muhimmiyar rawa wajen ƙira, ƙira da kiyaye sassan da ke sama

1)Modules yana nuna girman hakora. R-module shine rabon farar da'irar rarraba zuwa PI (π), wanda aka bayyana a cikin millimeters (mm). Baya ga kayayyaki, muna da Diametral pitch (CP) da DP (Diametral pitch) don bayyana girman hakora. Farar diamitaral shine tsayin rarrabuwar baka tsakanin maki daidai akan hakora biyu maƙwabta.

2) Menene "diamita da'ira"? Da'irar da'irar ma'auni ita ce diamita na tunanikayan aiki. Manyan abubuwa guda biyu da ke tabbatar da girman kayan aikin su ne modules da adadin hakora, kuma diamita na da'irar rarraba daidai yake da samfurin adadin hakora da modules (ƙarshen fuska).
3) Menene "Angle matsi"? Babban kusurwar da ke tsakanin layin radial a tsakar siffar hakori da tangent ɗin haƙori na batu ana kiransa matsa lamba na da'irar tunani. Gabaɗaya magana, kusurwar matsa lamba tana nufin kusurwar matsa lamba na da'irar firikwensin. Matsakaicin matsi mafi yawan amfani shine 20 °; duk da haka, ana amfani da gears tare da kusurwar matsa lamba na 14.5 °, 15 °, 17.5 °, da 22.5 °.

4) Menene banbanci tsakanin kai daya da tsutsa mai kai biyu? Adadin hakoran karkace na tsutsa ana kiransa "yawan kawunan", wanda yayi daidai da adadin hakora na kayan aiki. Da yawan kawunansu, mafi girman kusurwar jagora.

5) Yadda za a bambanta R (hannun dama)? L (hagu) Gear shaft a tsaye ƙasa lebur gear hakori karkata zuwa dama shine gear dama, karkata zuwa hagu kayan hagu ne.

6) Menene bambanci tsakanin M (modulus) da CP (pitch)? CP (Circular pitch) shine madauwari farar haƙora akan da'irar madaidaici. Naúrar iri ɗaya ce da modules a millimeters. CP da aka raba ta PI (π) yana haifar da M (modulus). Ana nuna alaƙa tsakanin M (modulus) da CP kamar haka. M (modulus) = CP/π (PI) Dukansu raka'a ne na girman hakori. (Dawafin rarrabawa = nd=zpd=zp/l/PI ana kiransa modulus

7) Menene "baya"? Tazarar da ke tsakanin saman haƙori na kayan aiki guda biyu lokacin da aka haɗa su. Backlash shine madaidaicin madaidaicin madaidaicin aiki na haɗa kayan aiki. 8) Menene bambanci tsakanin ƙarfin lanƙwasa da ƙarfin saman haƙori? Gabaɗaya, ya kamata a yi la'akari da ƙarfin gears daga bangarori biyu: lanƙwasawa da ƙarfin haƙori. Karfin lankwasawa shine ƙarfin haƙori wanda ke ba da iko don tsayayya da karyewar hakori a tushen saboda aikin lanƙwasawa. Ƙarfin saman haƙori shine ƙarfin juzu'i na saman haƙori yayin maimaita haɗuwar haƙorin da aka yi masa. 9) A cikin lanƙwasawa ƙarfi da hakori surface ƙarfi, abin da ƙarfi da ake amfani a matsayin tushen zabin kaya? Gabaɗaya, duka biyun lanƙwasawa da ƙarfin haƙori suna buƙatar tattaunawa. Koyaya, lokacin zabar ginshiƙan da ake amfani da ƙasa akai-akai, gears na hannu, da ginshiƙan ƙaramar sauri, akwai lokuta inda aka zaɓi ƙarfin lanƙwasa kawai. Daga ƙarshe, ya rage ga mai ƙira ya yanke shawara.