DTH Hammer
DongWoo Machinery is specialized in manufacturing DTH (Down the Hole) Hammer Bit since 1990. Our manufacturing skills, quality control and constant efforts of development are the fundamental force of leading the market.
DongWoo Hammer and Bit are made by finest mechanical process, special heat treatment with intensive quality control by our engineers. With such effort, we have been manufacturing various products which have outstanding drilling speed, and pressure intensity with effective air pressure transmission.
Therefore, our products are widely utilized in wide range of construction sites.
Video
SPECIFICATIONS
* Customer can choose the shank type and Joint type to use.
| Model | Recommend Bit Dia.(mm) |
Outside Dia.(mm) |
Shank Type | Length(mm) | Weight(kg) | Joint Type |
|---|---|---|---|---|---|---|
| DW80S(3") | 90~110 | 79 | DHD3.5 | 883 | 24.5 | 2-3/8 API Reg. Pin |
| DW90S(4") | 115~153 | 96 | DHD340, SD4 | 1005 | 37 | 2-3/8 API Reg. Pin |
| DW140S(6") | 152~203 | 138 | SD6 | 1332 | 108 | 3-1/2 API Reg. Pin |
| DW180S(8") | 380~445 | 181 | DHD380 | 1,413 | 205 | API 4-1/2 Reg.Pin |
| DW220S(10") | 445~575 | 226 | N100 | 1,567 | 345 | API 4-1/2 Reg.Pin / Hex Joint |
DW270S (SD12) |
380~475 | 273 | SD12 | 2,070 | 650 | API 6-5/8 Reg.Pin / Hex Joint |
DW320S  |
380~530 | 320 | DW320 | 2,090 | 950 | API 7-5/8 Reg.Pin / Hex Joint |
DW370S  |
445~630 | 370 | DW370 | 2,155 | 1,200 | API 8-5/8 Reg.Pin / Hex Joint |
DW410S (N180, SD18)  |
457~650 | 410 | N180 / SD18 | 2,053 | 1,510 | API 8-5/8 Reg.Pin / Hex Joint |
| DW470S (N180, SD18) | 525~750 | 470 | N180 / SD18 | 2,123 | 2,110 | API 8-5/8 Reg.Pin / Hex Joint |
DW530S (N240) |
675~800 | 530 | DW530 / N240 | 2,489 | 2,764 | Hex Joint |
| DW640S | 775~975 | 640 | DW640 | 2,399 | 3,839 | Hex Joint |
DW800S  |
975~1,175 | 800 | DW800 | 2,516 | 6,435 | Hex Joint |
AIR CONSUMPTION
| Model | AIR CONSUMPTION | ||
|---|---|---|---|
| 150PSI (10.5kg/cm2) |
200PSI (14kg/cm2) |
250PSI (17.6kg/cm2) |
|
| DW80S (3") |
185 CFM (5.2 ㎥/min) |
265 CFM (7.5 ㎥/min) |
|
| DW90S (4") |
240 CFM (6.8 ㎥/min) |
315 CFM (8.9 ㎥/min) |
|
| DW140S (6") |
275 CFM (7.8 ㎥/min) |
385 CFM (10.9 ㎥/min) |
|
| DW180S (8") |
610CFM (17.3㎥/min) |
810CFM (22.9㎥/min) |
|
| DW220S (10") |
660CFM (18.7㎥/min) |
980CFM (27.8㎥/min) |
|
| DW270S (SD12) |
860CFM (24.4㎥/min) |
1,100CFM (31.1㎥/min) |
1,700CFM (48.1㎥/min) |
| DW320S | 1,150CFM (32.6㎥/min) |
1,650CFM (46.7㎥/min) |
2,150CFM (60.9㎥/min) |
| DW370S | 1,350CFM (38.2㎥/min) |
1,930CFM (54.7㎥/min) |
2,720CFM (77.0㎥/min) |
| DW410S (N180, SD18) |
1,430CFM (40.5㎥/min) |
2,120CFM (60.0㎥/min) |
3,000CFM (85.0㎥/min) |
| DW470S (N180, SD18) |
1,650CFM (46.7㎥/min) |
2,440CFM (69.1㎥/min) |
3,450CFM (97.7㎥/min) |
| DW530S (N240) |
2,150CFM (60.9㎥/min) |
2,900CFM (82.1㎥/min) |
3,930CFM (111.3㎥/min) |
| DW640S | 2,800CFMM (79.3㎥/min) |
3,700CFM (104.8㎥/min) |
4,600CFM (130.3㎥/min) |
| DW800S | 3,500CFM (99.1㎥/min) |
5,300CFM (150.1㎥/min) |
7,250CFM (205.3㎥/min) |
※1CFM=0.028317㎥/min
