- Military grade special steel minimizes breakage and cracking failures.
- Advanced forging process enhances the fatique strength of the drill bit steel body.
- Ultrasonic and maanetic particle flaw detection identify and eliminate material and forging defects, reducing potentiaquality issues during drilling.
- Larger carbides extend the service life of the drill bit.
- CNC machining ensures precise dimensions of the drill bit.
- Specially desianed foot valve provides hiah strenath and toughness, ensuring reliable performance.
- Shock absorbing plastic pin enhances the service life of the shank spline.
Numa Shank
4k0JSI Rock Tools | Top Hammer Drilling Tools | DTH Drilling To
| Model |
Bit shank |
L |
Φ |
L1 |
Φ1 |
Spline |
Air hole |
Rec. hole size(mm) |
| JH10N |
NUMA100 |
375 |
165 |
53 |
54 |
10 |
3 |
245-305 |
| TK12N |
Numa120 |
490.5 |
191 |
56.5 |
75.6 |
12 |
3 |
305-380 |
| TK12HN |
Numa125 |
491 |
209 |
54 |
74.5 |
10 |
3 |
305-380 |
| TK14 |
TK14 |
520 |
235 |
/ |
/ |
10 |
3 |
400-500 |
| TK18 |
NUMA180 |
527.5 |
297 |
80.7 |
93.2 |
12 |
6 |
500-600 |
| TK24 |
TK24 |
560 |
380 |
80 |
118.2 |
14 |
6 |
600-800 |
| TK28 |
TK28 |
560 |
430 |
80 |
118.2 |
16 |
6 |
800-1150 |
