
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 | UCC208 | |
| Nrụpụta Mba. | UC208 | |
| Ebe obibi | C208 | |
| Obere dayameta | d | 40 mm |
| N'ozuzu obosara | a | 100 mm |
| Obosara ụlọ | g | 30 mm |
| Akụkụ chamfer | r | 2.5 mm |
| Obosara mgbanaka ime | B | 49.2 mm |
| Center of Bearing from Bearing End | n | 19 mm |
| Ibu ibu | 1.22 n'arọ | |