Middle-Low Hammer

Product Name: NBR Middle-Low Air Pressure DTH Hammers
Product model: NBR1A, NBR2A, NBR3A

Category:
Details Of Middle-Low Hammer

The NBR1A, NBR2A and NBR3A downhole impactors are medium to low pressure impactors that can be matched to BR series drills.

 Features Of Middle-Low Hammer:

1. Adapt to the working wind pressure of 0.7-1.75Mpa.
2. valveless hammer.
3. Simple structure, easy disassembly and long life.
4. High impact power and fast drilling speed
5. Low air consumption and low energy consumption. When it is necessary to increase the slag discharge, the hole can be drilled in the check valve.

 

Specification Of NBR Series DTH Hammer
Item DescriptionWeight(kg)
NBR1ANBR2ANBR3A
1、Top Sub1.72.65.2
2、“O” Type Ring0.10.10.1
3、Chenck Valve0.10.10.1
4、Spring0.050.050.2
5、Air Distributor0.80.60.8
6、Internal Cylinder0.80.81.3
7、Piston1.23.85.5
8、External Cylinder44.59.5
9、Guided Sleeve0.150.61
10、“O” Ring Of Stop Ring0.0050.0050.05
11、Stop Ring0.10.10.15
12、Drive Chuck0.81.22
13、Drill Bit1.72.54
Technical Data
Length(Without Bit)NBR1ANBR2ANBR3A
760mm880mm889mm
Weight(Without Bit)10.00kg14.50kg26.00kg
External DiameterØ54mmØ62mmØ82mm
Bit ShankBR1BR2BR2
Hole RangeØ64-Ø76mmØ70-Ø90mmØ90-Ø110mm
Connection ThreadBr40,BOXRd50,BOXAPI2 3”/8REG
Working Pressure1.0-1.5Mpa1.0-1.5Mpa1.0-1.5Mpa
Impact Rate at 14 Bar27HZ25HZ25HZ
Recommended Rotation Speed25-40r/min25-40r/min25-40r/min
Air Consumption0.7Mpa:1.5m³/min0.7Mpa:2.5m³/min0.7Mpa:4.0m³/min
1.0Mpa:2.5m³/min1.0Mpa:4.0m³/min1.0Mpa:6.0m³/min
1.4Mpa:3.0m³/min1.4Mpa:5.0m³/min1.4Mpa:8.0m³/min

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