1) Uluhlu lwedayamitha ekhethiweyo kunye nedayamitha ecetyiswayo
Ubungakanani obuqhelekileyo beentsimbi zetsimbi ukusuka kwi-6 ukuya kwi-50mm, kunye nomgangatho ophakanyisiweyo we-diameters yentsimbi yentsimbi yi-6, 8, 10, 12, 14, 16, 20, 25, 32, 40, kunye ne-50mm.
2) Ukuphambuka okuvumelekileyo kwimilo yomhlaba kunye nobukhulu bentsimbi ye-ribbed bar
Imigaqo yoyilo lweembambo ezinqamlezileyo zeentsimbi zentsimbi ziya kuhlangabezana nezi mfuno zilandelayo:
I-angle β phakathi kweembambo ezinqamlezayo kunye ne-axis yentsimbi yentsimbi akufanele ibe ngaphantsi kwama-45 degrees. Xa i-angle efakiweyo ingekho ngaphezu kwama-70 degrees, isalathiso seembambo ezinqamlezileyo kumacala achasene nentsimbi yentsimbi kufuneka zichasane;
Isithuba esincinci se-l yeembambo ezinqamlezileyo asiyi kuba sikhulu kune-0.7 amaxesha obubanzi obuqhelekileyo bentsimbi yentsimbi;
I-angle α phakathi kwecala leembambo ezinqamlezileyo kunye nobuso bentsimbi yentsimbi ayiyi kuba ngaphantsi kwama-45 degrees;
Isixa sezithuba (kubandakanywa nobubanzi beembambo ze-longitudinal) phakathi kweziphelo zeembambo ezinqamlezileyo kumacala amabini ajongene nentsimbi yentsimbi ayiyi kuba ngaphezu kwe-20% yomjikelezo oqhelekileyo wentsimbi yentsimbi;
Xa i-diameter ekhethiweyo yentsimbi yentsimbi ayikho ngaphezu kwe-12mm, indawo yembambo enxulumene nayo ayifanele ibe ngaphantsi kwe-0.055; xa i-diameter engu-14mm kunye ne-16mm, indawo yembambo ehlobene akufanele ibe ngaphantsi kwe-0.060; xa i-diameter ye-nominal ingaphezu kwe-16mm, indawo yembambo ehlobene akufanele ibe ngaphantsi kwe-0.065. Jonga kwiSihlomelo C xa kubalwa indawo yembambo ezalanayo.
Imivalo yetsimbi ye-Ribbed ngokuqhelekileyo ineembambo ze-longitudinal, kodwa kwakhona ngaphandle kweembambo ze-longitudinal;
3) Ubude kunye nokuphambuka okuvumelekileyo
A. Ubude:
Imivalo yensimbi idla ngokuhanjiswa ngobude obusisigxina, kwaye ubude obuthile bokuhanjiswa kufuneka buboniswe kwinkontileka;
Imivalo yokuqinisa inokuhanjiswa kwiikhoyili, kwaye i-reel nganye kufuneka ibe yi-rebar enye, ivumela i-5% yenani lee-reels kwibhetshi nganye (ii-reels ezimbini ukuba zingaphantsi kwe-2) ezibandakanya ii-rebar ezimbini. Ubunzima bedisk kunye nedayamitha yedisk bumiselwa ngothethwano phakathi komthengisi kunye nomthengi.
B. ukunyamezela ubude:
Ukuphambuka okuvumelekileyo kobude bentsimbi yentsimbi xa ihanjiswa kubude obusisigxina ayiyi kuba ngaphezu kwe-± 25mm;
Xa ubude obuncinane bufunekayo, ukuphambuka kwayo +50mm;
Xa ubude obude bufunekayo, ukuphambuka ku-50mm.
C. igophe kunye neziphelo:
Ukuphela kwentsimbi yentsimbi kufuneka kuchetywe ngokuthe tye, kwaye i-deformation yendawo akufanele ichaphazele ukusetyenziswa.