1. Bakeng sa tlhahiso e kholo ea buka e potolohang
2. Ka senotlolo sa koili sa mokokotlo sa mofuta oa G le khetho e tloaelehileng ea senotlolo sa mofuta oa L
3. E loketse bukana e itseng (sekoahelo se seholo ho feta pampiri e ka hare)
4. Max e ka sebelisoa bakeng sa bukana ea botenya ba 20mm
1) Karolo ea ho phunya masoba
2) Karolo ea ho hokahanya masoba
3) Karolo ea ho seha ea Spiral, ho tlama le ho seha sekere
4) libuka tse felileng li bokella karolo
Mofuta oa G (bophara ba spiral 14mm -25mm), spiral 14mm -25mm, e ka khetha senotlolo sa mofuta oa G, empa mofuta ofe oa mofuta oa G o itšetlehile ka bophahamo ba lesoba, bophara ba spiral le bophara ba terata.
Mofuta oa L (bophara ba spiral 8mm - 25mm)
| Bophara ba Spiral (mm) | Bophara ba terata (mm) | Lesoba (mm) | Botenya ba buka (mm) |
| 8 | 0.7-0.8 | Φ3.0 | 5 |
| 10 | 0.7-0.8 | Φ3.0 | 7 |
| 12 | 0.8-0.9 | Φ3.5 | 9 |
| 14 | 1.0-1.1 | Φ4.0 | 11 |
| 16 | 1.0-1.1 | Φ4.0 | 12 |
| 18 | 1.0-1.1 | Φ4.0 | 14 |
| 20 | 1.1-1.2 | Φ4.0 | 15 |
| 22 | 1.1-1.2 | Φ5.0 | 17 |
| 25 | 1.1-1.2 | Φ5.0 | 20 |
| lebelo | Libuka tse fihlang ho tse 1300 ka hora |
| Khatello ea moea | 5-8 kgf |
| Bophara ba spiral | 8mm – 25mm |
| Bophara bo boholo ba tlamo | 420mm |
| Bophara bo bonyane ba ho tlama | 70mm |
| Mefuta e fapaneng ea likere tsa hook ea mokokotlo oa mofuta oa G | 14mm – 25mm |
| Mefuta e fapaneng ea likere tse tloaelehileng tsa hook tsa mofuta oa L | 8mm - 25mm |
| Spiral lesoba sekontiri se metsi boikhethelo mefuta e fapaneng | 5,6,6.35,8,8.47 (mm) |