Products Description
Tapered drill equipment also provides a hexagonal chuck section to provide leverage for the rotation chuck bushing, which usually also has a forged collar to maintain the proper shank striking face position in the rock drill, and match a tapered bit at the socket end. Holes are typically drilled in 0.6 m increments to accommodate the air-leg feed length.

PRODUCT SPECIFICATION

Rod Length
500~800mm
1500~4000mm
1830~6100mm
Shank Length
22*108mm
25*108mm
25*159mm
SPECIFICATION NOTIC
Notes:
1. The ordinary connection taper degree is 7º, 11º and 12º, other degrees like 4.8º, 6º and 9º are also available upon request;
2. The ordinary shank is Hex22 × 108mm, Hex25 × 159mm and other styles are also available if upon customers’ request;
3. The rod length must be specified in order;
4. In order to adapt to different rock conditions, the drill rod is selected by users.
TO CHOOSE THE RIGHT PRODUCTS
Different rock formations and rock drills require different taper angles. For this, we can provide taper drill rods with three grades, and lengths available from 600mm (2’) to 11,200mm (36’8”), (measured from the collar to the tapered end).
Taper Rods Grades Recommended Table
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 |
Application
Company Profile
Quzhou Jugong Machinery Co.,Ltd.specialized in machine R&D and manufacturing for 10 years. Our product cpvers air compressors,jack hammer,drill rig,drill rig,parts,booster,tunnel shotcreting machine and other machinery hardware product etc.
Our products are popular in more than 50 areas, such as Europe , South America, Southeast Asia, the middle East and etc.
We have advanced new design every year. We are always ready to provide quality products and good after-sales service for every customer. As Chinese professional machinery manufacturer and exporter, we sincerely hope to eastablish business relations with your esteemed corporations.
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