Different rock formations and rock drills require different taper angles. When drilling with high impact hydraulic rock drills in medium-hard to hard and abrasive rock formations, a wide taper angle is normally used. Taper angles of 11 and 12-degrees are normally used on modern drill rigs. For low impact rock drills and softer rock formations, a narrow taper angle of seven degrees is used. A 7-degree angle can also be used if bit spinning is a problem when using 11 and 12-degree equipment. In addition, a 4, 46 degree angle is ideal for soft rock when you're using pneumatic or hydraulic drill rigs - to prevent bits from spinning or becoming detached.
Part number Taper Angle Shank Length Weight
Mm mm kg
BT220600-66° (7° 11° 12° ) Hex 22 x 108 600 2.2
BT220800-66° (7° 11° 12° ) Hex 22 x 108 800 2.8
BT221000-66° (7° 11° 12° ) Hex 22 x 108 1000 3.4
BT221200-66° (7° 11° 12° ) Hex 22 x 108 1200 4
BT221400-66° (7° 11° 12° ) Hex 22 x 108 1400 4.5
BT221600-66° (7° 11° 12° ) Hex 22 x 108 1600 5.1
BT221800-66° (7° 11° 12° ) Hex 22 x 108 1800 5.7
BT222000-66° (7° 11° 12° ) Hex 22 x 108 2000 6.5
BT222200-66° (7° 11° 12° ) Hex 22 x 108 2200 7.2
BT222400-66° (7° 11° 12° ) Hex 22 x 108 2400 7.8
BT222600-66° (7° 11° 12° ) Hex 22 x 108 2600 8.3
BT222800-66° (7° 11° 12° ) Hex 22 x 108 2800 8.9
BT223000-66° (7° 11° 12° ) Hex 22 x 108 3000 9.5
BT223600-66° (7° 11° 12° ) Hex 22 x 108 3600 11.2
BT224000-66° (7° 11° 12° ) Hex 22 x 108 4000 12.7
BT224800-66° (7° 11° 12° ) Hex 22 x 108 4800 15.2
BT225600-66° (7° 11° 12° ) Hex 22 x 108 5600 18.4
BT226400-66° (7° 11° 12° ) Hex 22 x 108 6400 20
BT227200-66° (7° 11° 12° ) Hex 22 x 108 7200 22
BT228000-66° (7° 11° 12° ) Hex 22 x 108 8000 24.5
| 22mm 7 / 8 " hex rod. 108mm 4 1 / 4 " shank. |
| 4°46' taper |
| Length (mm) |
Part No. |
Weight (kg) |
| 800 |
578-0108,11 |
2.9 |
| 1600 |
578-0116,11 |
5.4 |
| 2000 |
578-0120,11 |
6.6 |
| 2200 |
578-0122,11 |
7.1 |
| 2400 |
578-0124,11 |
7.8 |
| 3200 |
578-0132,11 |
10.2 |
| 3500 |
578-0135,11 |
11.1 |
| 4000 |
578-0140,11 |
12.7 |
| |
|
|
| |
|
|
| 7° taper |
| Length (mm) |
Part No. |
Weight (kg) |
| 400 |
573-0104,11 |
1.7 |
| 800 |
573-0108,11 |
2.9 |
| 1830 |
573-0118,11 |
6 |
| 2000 |
573-0120,11 |
6.5 |
| 2435 |
573-0124,11 |
7.8 |
| 3050 |
573-0131,11 |
9.9 |
| 3200 |
573-0132,11 |
10.1 |
| 4000 |
573-0140,11 |
12.7 |
| |
|
|
| |
|
|
| 11° taper |
| Length (mm) |
Part No. |
Weight (kg) |
| 610 |
579-0106,11 |
2.4 |
| 1220 |
579-0112,11 |
4.2 |
| 1525 |
579-0115,11 |
5 |
| 1830 |
579-0118,11 |
6.1 |
| 2000 |
579-0120,11 |
6.6 |
| 2435 |
579-0124,11 |
7.9 |
| 2600 |
579-0126,11 |
8.4 |
| 3200 |
579-0132,11 |
10.3 |
| 3655 |
579-0137,11 |
11.7 |
| 4000 |
579-0140,11 |
12.8 |
| 4800 |
579-0148,11 |
15.1 |
| 5600 |
579-0156,11 |
17.5 |
| 6400 |
579-0164,11 |
20 |
| 7200 |
579-0172,11 |
22.4 |
| 8000 |
579-0180,11 |
24.9 |
| |
|
|
| |
|
|
| 12° taper |
| Length (mm) |
Part No. |
Weight (kg) |
| 1220 |
577-0106,11 |
2.3 |
| 1525 |
577-0112,11 |
4.2 |
| 1830 |
577-0115,11 |
5.1 |
| 2000 |
577-0118,11 |
6.1 |
| 2435 |
577-0120,11 |
6.6 |
| 3050 |
577-0124,11 |
7.9 |
| 3200 |
577-0131,11 |
9.8 |
| 3655 |
577-0132,11 |
10.2 |
| 3965 |
577-0137,11 |
11.7 |
| 4800 |
577-0140,11 |
12.8 |
| 5600 |
577-0148,11 |
15.2 |
| 6400 |
577-0156,11 |
18.4 |
| 7200 |
577-0164,11 |
20 |
| 8000 |
577-0172,11 |
22 |
| |
577-0180,11 |
24.8
|
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