DHD380 down the hole dth rock drill hammer and button bit
DTH hammer:
The GSE DHD series DTH hammer: The Sinodrills GSE DHD series hammers can fit the DTH bits with DHD shank. Due to its optimized and robust design, in addition the superior material makes the DTH hammer longer life, less air consumption and 15% higher penetration speed than conventional DTH hammer in the market. The below is the specification of GSE DHD series DTH hammer:
GSE DHD hammer
| GSE DHD hammer size | GSE DHD Hammer working pressure | The impact frequency when it is working on 18Bar |
| GSE DHD3.5 | 6 bar ~ 35 Bar | 32Hz |
| GSE DHD340 | 6 bar ~ 35 Bar | 31Hz |
| GSE DHD350 | 6 bar ~ 35 Bar | 30Hz |
| GSE DHD360 | 6 bar ~ 35 Bar | 28Hz |
| GSE DHD380 | 6 bar ~ 35 Bar | 23Hz |
GSE-DHD380 DTH hammer
DTH hammer exploded view | Parts name | Part number | Approx. weight(kg) |
 | 01- top sub: 4 1/2” API Reg pin | DHD380-01 | 40.48 |
02 -O ring | DHD380-02 | 0.01 | |
03-check valve dart | DHD380-03 | 0.80 | |
04-Choke blank (optional) | DHD380-04 | 0.01 | |
05-Spring | DHD380-05 | 0.05 | |
06 -Disc Spring | DHD380-06 | 0.80 | |
07-Steel washer | DHD380-07 | 1.13 | |
08-Rigid valve | DHD380-08 | 8.15 | |
09-O ring | DHD380-09 | 0.01 | |
10-Internal cylinder | DHD380-10 | 7.30 | |
11-Piston | DHD380-11 | 41.31 | |
12-Out tube | DHD380-12 | 59.85 | |
13-Bit retainer ring | DHD380-13 | 1.52 | |
14-O ring | DHD380-14 | 0.01 | |
15-Drive sub | DHD380-15 | 18.21 | |
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Seal kit: | DHD380-SK | 0.03 | |
02 x 1 |
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09 x 1 |
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14 x 1 |
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Repair kit: | DHD380-RK | 118.57 | |
01 x 1 |
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12 x 1 |
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15 x 1 seal kit x 1 |
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Bit Shank DHD380 |
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GSE- DHD380 DTH hammer technical data | ||||
Net weight | Out diameter | DTH hammer length without bits | Frequency at 18 bar | |
180.0 kgs | 182 mm | 1228 mm | 23 HZ | |
Rec. hole size | Working pressure | Air consumption: M3 (CBM)/min | ||
203mm-305mm | 8 bar-30 bar | @ 10 bar | @18 bar | @ 24 bar |
12 | 26 | 35 | ||
DTH bits
DTH bit is the tool cutting rock. Sinodrills DTH bits are made of superior quality alloy steel which is made by Timken in U.S. Besides, all our DTH bits are using the brand "Element Six" T.C carbide which provides (the T.C buttons) for Boart Longyear. In addition art manufacturing technology makes our DTH bits with higher and more reliable quality.
Misson60 dth bit specification:
Shank style | Diameter in mm | Flat face | Convex face | Concave face | Approx. weight | Part number |
DHD380 | 203 | √ | √ | 48.1 kgs | DHD380-203 | |
216 | √ | √ | 52.0 kgs | DHD380-216 | ||
241 | √ | √ | 58.7kgs | DHD380-241 | ||
254 | √ | √ | 60.4 kgs | DHD380-254 | ||
292 | √ | √ | 80.1 kgs | DHD380-292 | ||
305 | √ | √ | 83.5kgs | DHD380-305 |
DTH bit face and button selection
Mission60 shank:
More dth bits
| Bit size | Shank type | Recommended DTH bits diameter |
| 3.5”/3” DTH hammer bits | COP34, DHD3.5, MISSION30, BR3 shank | 90mm~ 105mm |
| 4” DTH hammer bits | DHD340, QL40, MISSION40, SD4 shank | 110mm~ 130mm |
| 5” DTH hammer bits | DHD350, QL50, MISSION50, SD5 shank | 134mm~ 152mm |
| 6” DTH hammer bits | DHD360, QL60, MISSION60, SD6 shank | 152mm~ 203mm |
| 8” DTH hammer bits | DHD380, QL80, MISSION80, SD8 shank | 203mm~ 305mm |
| 12” DTH hammer bits | DHD112, SD12 and QL120 shank. | Available upon to customers’ request
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