Active Member
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[China]
Address: Building 3, Rainbow road,No.188 ; Xishui;Hubei province
Contact name:Lucy
Hubei Superdrill Mechnical Equipment Co.,Ltd |
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11 degree tapered drill steel rod and pipe for rock tools
Contact: Lucy
Tel: +86 713 8906693
Whatsapp/Phone:+86 18186993613
E-mail: sales@superdrill.com.cn
Tapered drill rod,another name called taper rod, tapered drill steels, This provides a hexagonal chuck section to provide leverage for the rotation chuck bushing. It usually has a forged collar to maintain the proper shank striking face position in the rock drill, and a tapered bit end. Tapered steel lengths— available from 0.6m to 3.6 m in length—are measured from the collar to the bit end.
Shank Hexagon: 19 x108 mm, 22x 108mm, 25 x108 mm, 25 mmX159 mm 6,
7, 11, 12 degree taper in most lengths, taper degree of drill steel
is mostly imports for excellent drilling productivity.
For drilling medium-hard to hard and abrasive rock formations,Taper
angles of 11 and 12-degrees are
normally used on modern drill rigs, like YT28B, YT29A, Y24, YT24,
Mobile rock drill pneumatic and hydraulic.
For low impact rock drills and softer rock formations, a narrow
tape range of 7 degrees is used, such as
Indian, Saudi’s granite and marble quarry.
A comprehensive range of taper button bits, cross bits and chisel
bits with 6, 7, 11, 12 degreetaper.
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.
| Rod Length | |
| 500~800mm | |
| 1500~4000mm | |
| 1830~6100mm | |
| Shank Length | |
| 22*108mm | |
| 25*108mm | |
| 25*159mm | |
Tapper Degree 7º,11º,12º | |
PRODUCT SPECIFICATION
| 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° |
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. |
Different rock formations and rock drills require different taper angles. For this,superdrill 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 |
