7 градусов Jack молоток G2 с коническим отверстием для бурения скальных пород стержни шестигранный хвостовик с коническим отверстием производства шпиндель сверлильного станка для добычи полезных ископаемых

Rod Length

Taper Degree

Shank Style

mm

foot/inch

Hex22 × 108mm

500 ~ 8,000

1’ 8” ~ 26’ 2”

7°, 11° and 12°

Hex25 × 108mm

1500 ~ 4,000

4’11” ~ 13’1”

7°

Hex25 ×159mm

1830 ~ 6,100

6’ ~ 20”

7° and 12°

Grades

Types

Recommended conditions

Superior

G III, T III,

KSW

1) Rock drills impact energy: ≥76J, typically model: YT28

2) Drilling depth: ≥ 2.5 m (8’ 2 27/64”)

3) Rock formations: very hard, hard, medium hard and soft rock

Protodyakonov Hardness Scale: f ≥ 15

Uniaxial Compressive Strength: ≥150 Mpa

4) Replacements: G rod, G I rod, ROK

Normal

G I, ROK

1) Rock drills impact energy: < 76 J, typically model: YT24

2) Drilling depth: ≤2.5 m (8’ 2 27/64”)

3) Rock formations: Medium hard and soft rock

Protodyakonov Hardness Scale: f <15

Uniaxial Compressive Strength: <150 Mpa

4) Replacements: G rod

Economy

G

1) Rock drills impact energy: < 76 J, typically model: YT24

2) Drilling depth: ≤2.5 m (8’ 2 27/64”)

3) Rock formations: Medium hard and soft rock

Protodyakonov Hardness Scale: f <10

Uniaxial Compressive Strength: <100 Mpa