| Pneumatic bergborvél með loftfæti | |||||
| Tæknilegar breytur | YT28 | YT27 | YT29A | YT24C | TY24 |
| Þyngd (kg) | 26 | 27 | 26.5 | 24 | 24 |
| Lengd (mm) | 661 | 668 | 659 | 628 | 678 |
| Loftþrýstingur (Mpa) | 0.4-0.63 | 0.4-0.63 | 0.4-0.63 | 0.4-0.63 | 0.4-0.63 |
| Áhrifahlutfall (Hz) | ≧37 | ≧39 | ≧39 | ≧37 | ≧31 |
| Loftnotkun (L"'/S) | ≦81 | ≦86 | ≦88 | ≦80 | ≦67 |
| Áhrifsorka(J) | ≧70J | ≧75J | ≧78J | ≧65J | ≧65J |
| Cylinder*Slag (mm) | 80*60 | 80*60 | 82*60 | 76*60 | 70*70 |
| Þvermál loftrörs (mm) | 25 | 19 | 25 | 25 | 19 |
| Skaftsmál (mm) | 22*108 | 22*108 | 22*108 | 22*108 | 22*108 |
| Bordýpt (m) | 5 | 5 | 5 | 5 | 5 |
| Bita þvermál (mm) | 34-42 | 34-45 | 34-45 | 34-42 | 34-42 |