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HEMCO offers Down-the-hole (DTH) hammers and bits for drilling diameters from 90mm to 445mm. The hammers and the bits are manufactured to the highest standards using premium grade steel alloys that are heat treated and hardened for maximum productivity without compromising durability or reliability.
- Simple design of the piston.
- More efficient energy transfer, faster drilling speed, lower air and oil consumption.
- Fewer internal parts, simple structure, longer life, less failure.
- Easy to disassemble because the top sub, drive chuck and external cylinder are connected by multistep thread.
QL Hammers
| Model |
Thread Connection |
Outer Diameter |
Hole Range |
Bit Shank |
Working Pressure |
Length |
Weight |
| HQL4 |
API 2 3/8" Reg Pin |
99mm |
110-135mm |
QL40 |
1.0-2.5Mpa |
1097mm |
41.0kg |
| HQL5 |
API 3 1/2" Reg Pin |
125mm |
135-155mm |
QLSO |
1.0- 2.5Mpa |
1156mm |
73.0kg |
| HQL6 |
API 3 1/2" Reg Pin |
148mm |
155-190mm |
QL60 |
1.0- 2.5Mpa |
1212mm |
95.0kg |
| HQL8 |
API 4 1/2" Reg Pin |
185mm |
195-254mm |
QL80 |
1.0- 2.5Mpa |
1465mm |
182.0kg |
COP Hammers
| Model |
Thread Connection |
Outer Diameter |
Hole Range |
Bit Shank |
Working Pressure |
Length |
Weight |
| HD35 |
API 2 3/8" Reg Pin |
82mm
|
90-110mm
|
DHD3.5 |
1.0-2.5Mpa
|
930mm
|
25.0kg
|
| HD45 |
API 2 3/8" Reg Pin |
99mm
|
110-135mm
|
Cop44,DHD340
|
1.0-2.5Mpa
|
1214mm
|
76.5kg
|
| HD55 |
API 3 1/2" Reg Pin |
125mm
|
135-155mm
|
Cop54,DHD350R
|
1.0-2.5Mpa
|
1214mm
|
76.5kg
|
| HD65 |
API 3 1/2" Reg Pin |
142mm
|
155-190mm
|
Cop64,DHD360
|
1.0-2.5Mpa
|
1492mm |
188.0kg
|
| HD85 |
API 4 1/2" Reg Pin |
180mm
|
195-254mm
|
Cop84,DHD380
|
1.0-2.5Mpa
|
1492mm
|
188.0kg
|
SD Hammers
| Model |
Thread Connection |
Outer Diameter |
Hole Range |
Bit Shank |
Working Pressure |
Length |
Weight |
| HSD4 |
API 2 3/8" Reg Pin |
99mm
|
110-135mm
|
SD4 |
1.0-2.5Mpa
|
1084mm
|
40.5kg
|
| HSD5 |
API 3 1/2" Reg Pin
|
125mm
|
135-155mm
|
SD5
|
1.0-2.5Mpa
|
1175mm
|
72.5kg
|
| HSD6 |
API 3 1/2" Reg Pin |
142mm
|
155-190mm
|
SD6
|
1.0-2.5Mpa
|
1261mm
|
100.0kg
|
| HSD8 |
API 4 1/2" Reg Pin
|
180mm
|
195-254mm
|
SD8
|
1.0-2.5Mpa
|
1463mm |
192.0kg
|
| HSD10 |
API 5 1/2" Reg Pin
|
225mm
|
254-311mm
|
SD10
|
1.0-2.5Mpa
|
1502mm
|
290.0kg
|
| HSD12 |
API 6 5/8" Reg Pin
|
275mm
|
305-445mm
|
SD12
|
1.0-2.5Mpa
|
1880mm
|
487.0kg
|
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