Guhuza urushinge rwa roller hamwe nimpeta yimbere ni ibice byuzuye bigizwe nigikombe cyo hanze cyashushanijwe, nimpeta yinyuma hamwe na serefegitura yo hanze, uruziga rwa urushinge hamwe nuruzitiro rwuruzitiro hamwe nimpeta yimbere ikurwaho. Guhuza inshinge za roller zifite impeta yumuhanda hamwe nuhetamye. hanze yubuso hamwe nimpeta ifatika.Nkigisubizo, barashobora kwishyura indinganizo idahuza ya axe igera kuri 3 °.
Guhuza inshinge za roller: PNA, RPNA | Kugenwa | Ibipimo (mm) | Ibipimo fatizo byumutwaro |
| Fw | D | C ± 0.5 | D1 | r min. | dyn.Cr KN | stat.Cor KN |
| RPNA 15/28 | 15 | 28 | 12 | 24.5 | 0.8 | 6.9 | 7.9 |
| RPNA 18/32 | 18 | 32 | 16 | 27 | 1.8 | 12.5 | 16.2 |
| RPNA 20/35 | 20 | 35 | 16 | 30.5 | 2.8 | 13 | 17.5 |
| RPNA 25/42 | 25 | 42 | 20 | 36.5 | 3.8 | 18.8 | 30.5 |
| RPNA 28/44 | 28 | 44 | 20 | 38.5 | 4.8 | 22 | 34 |
| RPNA 30/47 | 30 | 47 | 20 | 42 | 5.8 | 22.6 | 36 |
| RPNA 35/52 | 35 | 52 | 20 | 47.5 | 6.8 | 24.3 | 41.5 |
| RPNA 40/55 | 40 | 55 | 20 | 50.5 | 7.8 | 26 | 47 |
| RPNA 45/62 | 45 | 62 | 20 | 58 | 8.8 | 27.5 | 53 |
| Kugenwa | Ibipimo (mm) | Ibipimo fatizo byumutwaro |
| d | F | D | C ± 0.5 | B | D1 | r min. | r1 min. | s min. | dyn.Cr KN | stat.Cor KN |
| PNA 12/28 | 12 | 15 | 28 | 12 | 12 | 24.5 | 0.8 | 0.3 | 0.5 | 6.9 | 7.9 |
| PNA 15/32 | 15 | 18 | 32 | 16 | 16 | 27 | 0.8 | 0.3 | 0.5 | 12.5 | 16.2 |
| PNA 17/35 | 17 | 20 | 35 | 16 | 16 | 30.5 | 0.8 | 0.3 | 0.5 | 13 | 17.5 |
| PNA 20/42 | 20 | 25 | 42 | 20 | 20 | 36.5 | 0.8 | 0.3 | 0.5 | 18.8 | 30.5 |
| PNA 22/44 | 22 | 28 | 44 | 20 | 20 | 38.5 | 0.8 | 0.3 | 0.5 | 22 | 34 |
| PNA 25/47 | 25 | 30 | 47 | 20 | 20 | 42 | 0.8 | 0.3 | 0.5 | 22.6 | 36 |
| PNA 30/52 | 30 | 35 | 52 | 20 | 20 | 47.5 | 0.8 | 0.3 | 0.5 | 24.3 | 41.5 |
| PNA 35/55 | 35 | 40 | 55 | 20 | 20 | 50.5 | 0.8 | 0.3 | 0.5 | 26 | 47 |
| PNA 40/62 | 40 | 45 | 62 | 20 | 20 | 58 | 0.8 | 0.3 | 0.5 | 27.5 | 53 |
