
Usoro nke UC na-ezo aka na ahaziri ahazi, ejiri ọtụtụ ebe Ohiri isi ngọngọ nkeji bọọlụ nwere aka nkwụnye aka. N'ime isi ha bụ bọọlụ nwere oghere dị omimi nke nwere a dayameta mpụta okirikiri (SPB) emebere ka ọ dabara n'ime oghere okirikiri dabara adaba nke ụlọ nkedo. Na-akwado metric akụkụ, A na-ahazi usoro isiokwu a maka ngwa mmepụta ihe na-achọ ikike ibu dị elu, nrụnye kwụ ọtọ, na arụmọrụ a pụrụ ịdabere na ya.
| ISO | UCHA209 | |
| Nrụpụta Mba. | UC209 | |
| Ụlọ Mba. | HA209 | |
| Obere dayameta | d | 45 mm |
| Ebe etiti oche okirikiri dị elu | h | 82 mm |
| Akụkụ | w | 136 mm |
| N'ozuzu ogologo | b | 108 mm |
| Akụkụ | c | 5 mm |
| Elu nke mgbakwunye njedebe | a | 48 mm |
| Elu nke oghere mgbakwunye | s | G1 na |
| Akụkụ | l | 21 mm |
| Obosara mgbanaka ime | B | 49.2 mm |
| Center of Bearing from Bearing End | n | 19 mm |
| Ibu ibu | 1.92 n'arọ | |