Rock drills work according to the principle of impact crushing. During operation, the piston undergoes high-frequency reciprocating motion, continuously impacting the drill tail. Under the action of impact force, the pointed wedge shaped drill bit crushes the rock and chisels it into a certain depth, forming a dent. After the piston returns, the drill bit rotates at a certain angle, and the piston moves forward. When it impacts the drill tail again, a new dent is formed. The fan-shaped rock block between two indentations is sheared by the horizontal force generated by the drill bit. The piston continuously impacts the tail of the drill bit and continuously inputs compressed air or pressure water from the center hole of the drill bit to discharge the rock slag outside the hole, forming a circular drilling hole of a certain depth.
Montabert brand rock drills are currently the leading brand of rock drills, with mature technology, leading technology, and excellent quality. They are widely used in various fields such as mining, tunnel excavation, water conservancy engineering, and road construction. They have the characteristics of high efficiency and high return rate, and can effectively reduce engineering risks and labor intensity.
| Power class |
kw |
21 |
| Hole range(typical) (mini-maxi) |
mm |
45-76 |
| Strike flow (mini-maxi) |
l/mn |
95-118 |
| Strike pressure (mini-maxi) |
bar |
165-200 |
| Strike frequency (mini-maxi) |
Hz |
55-63 |
| Energy per blow (mini-maxi) |
J |
252-330 |
| Power out (mini-maxi) |
kw |
14-21 |
| Percussion inlet power(mini-maxi) |
kw |
26-39 |
| Rotation motor capacity |
cm³ |
100/125/160 |
| Rotation flow motor maxi |
l/mn |
48/60/75 |
| Max.rotation speed motor |
t/mn |
303/296 |
| Max.rotation torque motor |
Nm |
477/597/764 |
| Max.rotation pressure |
bar |
210 |
| Water flushing pressure (mini-maxi) |
bar |
14-24 |
| Water flushing flow (mini-maxi) |
l/mn |
60-120 |
| Front guide lubrication pressure |
bar |
3 |
| Front guide lubrication air flow |
l/mn |
300 |
| Front guide lubrication oil |
cm³/mn |
0.5 |
| Accum.Nitrogen pressure HP |
bar |
60 |
| Accum.Nitrogen pressure BP |
bar |
5 |
| Recommended oil viscosity |
cst |
ISO46 |
| Oil viscostiy at working temperature (mini-maxi) |
cst |
15-30 |
| Oil operating temperature (mini-maxi) |
ºC |
50to75 |
| Thrust feed force (mini-maxi) |
N |
11000-13000 |
| Collaring feed force |
N |
9000 |
| Collaring strike pressure |
bar |
110 |
| Percussion Back pressure |
|
|
| Recomended without drain |
bar |
<5 |
| Recommended with drain |
bar |
<5 |
| Maximum working without drain |
bar |
5 |
| Maximum working with drain |
bar |
12 |
| Rotation back pressure(maxi.) |
bar |
30 |
| ExternalHP line pressure(mini-maxi.) |
bar |
NOt Available |
| External HP flow approximate when no percussion |
l/mn |
NOt Available |
| Drain pressure(maxi.)if equipped |
bar |
2 |
| Drain flow approximate if equipped |
l/mn |
10 |
| Maxi.Retract force with reverse |
N |
Not Available |
| Percussion(optional)at 100 bar |
| Attention: Please consult us before using specific oil(non-inflammable, biodegradable,...). |
|
|
| This values are given for information, depending of drilling conditions or cofigurations. |
|
|
- What's the MOQ?
1 piece or unit.
2. How about the delivery time?
Based on order quantity, normally it takes 20 days for production. Only 3 to 7 days if we have stock on your request size.
3. How many years have you been producing hydraulic breakers and parts?
Over 20 years.
4. Quality & Service:
There will be strict inspection and testing for every order before shipping out. Our sales team and Technical Support will response for your question within 24 hours (Holidays Excluded). Free replacement will provide once the failure confirmed caused by our product quality.
5. What's the payment term?
T/T (Telegraphic Transfer) or Western Union. Pictures of products and packages will be sent to our customers before balance is paid.
6. Can you produce according to customers' design?
Yes, we can do customized products.
7. How about the package?
Standard exporting package.
Audited Supplier 
Audited Supplier 
){kind=link}
){kind=link}