Ngā Miro Takirua mō ngā Mekameka Kotahi e Rua mō ia Paerewa Amerika
Momo-Kotahi C-Steel
| Kāore. Niho | Tau | De | DI | Dm | A | Taumaha. Pauna (Tata ki te) |
| |
| Min | Mōrahi. | |||||||
| 12 | 40C12 | 2.170 | 1/2 | 1 | 139/64 | 11/2 | .75 | |
| 13 | 40C13 | 2.330 | 1/2 | 1/16 | 13/4 | 11/2 | .94 | |
| 14 | 40C14 | 2.490 | 1/2 | 1/8 | 111/16 | 11/2 | .91 | |
| 15 | 40C15 | 2.650 | 1/2 | 1/4 | 17/8 | 11/2 | 1.19 | |
| 16 | 40C16 | 2.810 | 1/2 | 3/8 | 2 | 11/2 | 1.34 | |
| 17 | 40C17 | 2.980 | 5/8 | 7/16 | 21/8 | 11/2 | 1.5 | |
| 18 | 40C18 | 3.140 | 5/8 | 1/2 | 25/16 | 11/2 | 1.8 | |
★ He awaawa kōkuhu kei roto i te pokapū hei whakawātea i te mekameka.
Rino-A Momo-Kotahi Takirua
| Kāore. Niho | Tau | De | Dp | Momo | DI | L | c | E | B1 | Taumaha (Tata ki te) |
| |
| Min | Mōrahi. | |||||||||||
| 15 | DS40A15 | 2.650 | 2.405 | A | 1/2 | 11/4 | 113/32 | 11/8 | 113/16 | .284 | 1.2 | |
| 16 | DS40A16 | 2.810 | 2.563 | A | 1/2 | 11/4 | 113/32 | 11/8 | 2 | .284 | 1.4 | |
| 17 | DS40A17 | 2.980 | 2.721 | A | 1/2 | 15/16 | 113/32 | 11/8 | 21/8 | .284 | 1.6 | |
| 18 | DS40A18 | 3.140 | 2.879 | A | 1/2 | 11/2 | 113/32 | 11/8 | 25/16 | .284 | 1.8 | |
| 19 | DS40A19 | 3.300 | 3.038 | A | 5/8 | 111/16 | 113/32 | 11/8 | 21/2 | .284 | 2.2 | |
| 20 | DS40A20 | 3.460 | 3.196 | A | 5/8 | 13/4 | 113/32 | 11/8 | 25/8 | .284 | 2.6 | |
| 21 | DS40A21 | 3.620 | 3.355 | A | 5/8 | 13/4 | 113/32 | 11/8 | 225/32 | .284 | 2.9 | |
| 22 | DS40A22 | 3.780 | 3.513 | A | 5/8 | 113/16 | 113/32 | 11/8 | 215/16 | .284 | 3.0 | |
| 23 | DS40A23 | 3,940 | 3.672 | A | 5/8 | 21/16 | 113/32 | 11/8 | 23/32 | .284 | 3.5 | |
| 24 | DS40A24 | 4.100 | 3.831 | A | 5/8 | 21/4 | 113/32 | 11/8 | 217/64 | .284 | 4.0 | |
Rino-Taper Takirua
| Kāore. Niho | Tau | Rahi o te Pū | De | Dp | D1 | Momo | L1 | c | E | L2 | B1 | Taumaha Awhi Anake |
| |
| Min | Mōrahi. | |||||||||||||
| 19 | DS40ATB19H | 1215 | 3.300 | 3.308 | 1/2 | 1/4 | A | 113/32 | 11/8 | 21/2 | 11/2 | .284 | 1.1 | |
| 20 | DS40ATB20H | 1215 | 3.460 | 3.196 | 1/2 | 1/4 | A | 113/32 | 11/8 | 25/8 | 11/2 | .284 | 1.3 | |
| 21 | DS40ATB21H | 1615 | 3.620 | 3.355 | 1/2 | 5/8 | A | 113/32 | 11/8 | 225/32 | 11/2 | .284 | 1.3 | |
| 23 | DS40ATB23H | 1615 | 3.940 | 3.672 | 1/2 | 5/8 | A | 113/32 | 11/8 | 23/32 | 11/2 | .284 | 1.5 | |
| 24 | DS40ATB24H | 1615 | 4.100 | 3.831 | 1/2 | 5/8 | A | 113/32 | 11/8 | 217/64 | 11/2 | .284 | 1.7 | |
Kua hangaia ngā porotiti takirua takitahi hei whakahaere i ngā mekameka roera momo kotahi-aho e rua, koinei te takenga mai o te ingoa "takirua takitahi". Ko te tikanga he momo A ēnei porotiti engari e wātea ana te momo taper bushing me te momo QD i runga i te tono a ngā kaihoko. He mea hanga ā mātou porotiti takirua takitahi me ngā niho whakapakeke, ā, he tae taketake, he paninga waikura pango rānei mō te mahi pai ake me te ātete iti ki te waikura. Ko ngā rahi o ngā porotiti takirua takitahi kei waenga i te ANSI #40 - #80/DIN06B-16B engari ka taea te hanga i ētahi atu rahi mēnā ka tonoa. He mea nui kia mōhio ahakoa he porotiti takirua ēnei porotiti, kāore rātou e rite ki te mekameka roera miro-rua.
