12° Hexagonal Steel Tapered Rock Drill Rods Shank 22 x 108mm , Blast Hole Drilling Tapered Rod
The tapered drill rod is used for rock drilling, blasting holes and other drilling works connected with various drilling bits in the quarries, coal mines, traffic and other constructions. The normal size of each rod consist of Hex22*108mm shank+ effective rod length+ taper rod end(7°,11°,12°), and the total length from 600mm to 9000mm. The connected body of tapered drill rod with drill bits (mainly button bits) is ideal drilling tool for drilling needs by granite & marble quarries, underground mining, for small blasting hole.
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.
Hex22mm / Hex25mm Rock Tapered Drill Rod , Blast Hole Drilling Tapered Rod
Tapered equipment affords drillers the ability to change drilling bits whilst still using the same drilling rod. Different taper sizes have different characteristics when it comes to the “knock-off” index – the smaller angle will prevent the bit from spinning.
1. Excellent comprehensive mechanical properties
2. High connection strength and sealability
3. High fatigue strength and long fatigue life
4. Good flushing effect to ensure high drilling rate
5. Steel grade: 95CrMo equivalent to SANDBAR 61.
6. Shank size: hex.22mm×108mm, hex.22mm×159mm.
hex.22mm×80mm, hex.25mm×108mm. hex.25mm×159mm.
7. Taper: 6, 7, 11, 12 degree etc.
8. With highly and strength of resistance on the bending, welding fixed.
9. Highly efficiency on production and steady quality.
10 It’s able to keep the hole straight and with long use time.
| Types of drill rods | Specifications | Length(mm) | Shank | Weight (kg) |
| Tapered drill rods | Taper Angle: 4, 6, 7, 11, 12 degree | 400mm to 8000mm | Hex22mm*108mm Hex25mm*159mm Hex19mm*108mm | 1.7 - 24.9 |
| Integral drill steel | Bit diameter: 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm | 400mm to 4800mm | 3 – 15.4 |
| Plug hole rods | Chisel bit diameter: 17mm, 20mm, 22mm | 150mm to 710mm | 0.6 - 2.9 |
Tapered Drill Rod-12°
In our after sales service system, We establish perfect control system strictly according to ISO-9000 series, in this system, technology date and problem solve solution and preventive measures will be provided in any maintain project, all the spare parts will be used in new OEM products with installation instructions, packing list, manufacturer's instruction, qualification and Warranty certificate.
We provide "one equipment & one case, endless service, namely the after sales service begin from the order confirmation, last for the working life of the equipment.
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12° Hexagonal Steel Tapered Rock Drill Rods For Blasting Holes Long Fatigue Life Images
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