Description
BR1 BR2 BR3 series DTH hammers are designed to operate efficiently at low air pressures and medium air pressures, using BR series bits.
|
DTH hammer type |
BR1 |
BR2 |
BR3 |
|
Length(less bit) mm |
760 |
880 |
|
|
Weight(less bit) kg |
10 |
14.5 |
26 |
|
External diameter mm |
Φ54 |
Φ62 |
Φ82 |
|
Bit shank |
BR1 |
BR2 |
BR3 |
|
Hole range(mm) |
Φ64-76 |
Φ70-90 |
Φ90-110 |
|
Connection thread |
RD40 Box |
RD50 Box |
API 2 3/8"Reg |
|
Working pressure |
0.7-1.75Mpa |
0.7-1.75Mpa |
0.7-1.75Mpa |
|
Impact rate at 1.4Mpa |
27Hz |
25Hz |
25Hz |
|
Recommended Rotation speed |
25-40r/min |
25-40r/min |
25-40r/min |
