
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 | UCC209-27 | |
| Nrụpụta Mba. | UC209-27 | |
| Ebe obibi | C209 | |
| Obere dayameta | 1d | 1-11/16 nke |
| N'ozuzu obosara | a | 4.3307 n'arọ |
| Obosara ụlọ | g | 1-7/32 n'arọ |
| Akụkụ chamfer | r | 0.098 n'arọ |
| Obosara mgbanaka ime | B | 1.937 n'arọ |
| Center of Bearing from Bearing End | n | 0.748 n'arọ |
| Ibu ibu | 1.55 n'arọ | |