Waxaa jira laba nooc oo tuubooyin bir ah oo aan kala go 'lahayn: tuubooyin bir ah oo aan kala go' lahayn oo kulul-rogma iyo tuubooyin bir ah oo aan kala go' lahayn oo qabow-rogma ah.
Tuubooyinka birta ah ee aan kala go'a lahayn ee kulul ayaa loo qaybiyaa tuubooyin bir ah oo guud, tuubooyin bir ah oo kuleyliye cadaadis hoose iyo dhexdhexaad ah, tuubooyin bir ah oo kuleyliye cadaadis sare leh, tuubooyin bir ah oo isku-dhafan, tuubooyin dildilaac batrool ah, tuubooyin bir ah oo juqraafi ah iyo tuubooyin kale oo bir ah.
Marka laga soo tago tuubooyinka birta guud, tuubooyinka birta kuleyliyaha cadaadiska hoose iyo kan dhexdhexaadka ah, tuubooyinka birta kuleyliyaha cadaadiska sare leh, tuubooyinka birta isku-dhafka ah, tuubooyinka dillaaca batroolka, iyo tuubooyinka kale ee birta ah, tuubooyinka birta ah ee aan kala go 'lahayn ee qabow-duuban (garaaca) ayaa sidoo kale ku jira tuubooyinka birta ah ee derbiyada khafiifka ah ee kaarboonka leh, tuubooyinka birta ah ee derbiyada khafiifka ah ee kaarboonka leh, tuubooyinka birta ah ee derbiyada khafiifka ah ee kaarboonka leh, tuubooyinka birta ee qaabaysan, iwm.
Dhexroorka dibadda ee tuubada kulul ee aan lahayn tolmada guud ahaan waa ka weyn yahay 32mm, dhumucda derbiguna waa 2.5-75mm. Dhexroorka tuubada birta ah ee aan lahayn tolmada qabow waxay gaari kartaa 6mm, dhumucda derbiguna waxay gaari kartaa 0.25mm. Dhexroorka dibadda ee tuubada khafiifka ah waxay gaari kartaa 5mm, dhumucda derbiguna waa ka yar tahay 0.25mm. Rogidda qabow waxay leedahay saxnaan cabbir ka sarreeya rogidda kulul.
Tuubooyinka birta ah ee aan kala go 'lahayn ee loogu talagalay isticmaalka guud: waxaa laga sameeyay bir kaarboon oo tayo sare leh sida 10, 20, 30, 35, 45, 16Mn, 5MnV iyo bir kale oo qaab-dhismeed ah oo aan daawad lahayn ama 40Cr, 30CrMnSi, 45Mn2, 40MnB iyo bir kale oo daawad leh oo kulul ama qabow lagu duubay.
Tuubooyinka 10, 20 iyo tuubooyinka kale ee aan lahayn kaarboonka ayaa inta badan loo isticmaalaa dhuumaha raritaanka dareeraha. Tuubooyinka aan lahayn ee laga sameeyay birta kaarboonka dhexdhexaadka ah sida 45 iyo 40Cr ayaa loo isticmaalaa in lagu soo saaro qaybaha farsamada, sida qaybaha cadaadiska leh ee baabuurta iyo cagafyada. Guud ahaan, tuubooyinka birta ah ee aan lahayn waxaa loo isticmaalaa in lagu hubiyo xoogga iyo tijaabooyinka siman. Tuubooyinka birta ah ee kulul waxaa la geeyaa xaalad kulul ama kuleyl lagu daweeyay; tuubooyinka birta ah ee qabow lagu daweeyay waxaa la geeyaa xaalad kuleyl lagu daweeyay.