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CIR70 CIR90 CIR110 Low Air Pressure DTH Drilling Button Bit

4inch High Air Pressure DTH Hammer Drill Button Bit
Bestlink company makes and supplies the finest and most efficient Down-the-Hole (DTH) hammers and bits for the mining, construction and water well industries.

  • CIR90 Low Air Pressure DTH Button Bit
  • Bestlink

CIR70 CIR90 CIR110 Low Air Pressure DTH Drilling Button Bit

CIR series DTH hammer, a kind of valve-equipped Low-Air-Pressure hammer with single piston, a plate valve and a central exhaust structure. The compressed air is adopted as the driving force. To prevent dust pollution and get a better performance, some high-pressure water may be added into the air for wet rock drilling.

It is mainly featured in:

1. The strong energy of single impact and the low engergy consumption in rock crushing.

2. The weight ratio of piston and bit almost reaches 1:1 to provide long effective acting time, which leads to the improved efficiency in rock crushing and the extended service life of the drilling tool.

3. A good performance in central air exhaust and cutting discharge, which reduces the repeated crushing of rock.

4. A check valve device is available to drill holes under water.

The CIR series DTH hammer, an ideal drilling tool, is widely used in such industries relating to energy,transportation,metallurgy,building, etc...

CIR series Low Air Pressure DTH Drilling Button Bit:


CIR70 CIR90 CIR110 Low Air Pressure DTH Drilling Button Bit
Hammer Model Diameter No.*button dia. (mm) No. Weight
mm inch gauge buttons front buttons flushing hole kg
CIR70 76 3 5*Φ12 3*Φ12 3 2.5
CIR90 90 3 1/2 6*Φ14 4*Φ12 3 3.3
100 4 6*Φ14 5*Φ12 3 4.2
CIR110 110 4 3/8 6*Φ14 5*Φ14 3 6.2
120 4 3/4 6*Φ14 6*Φ13 3 7.2
130 5 1/8 7*Φ14 6*Φ14 3 8.2


drill bits

dth hammer bits application area

Bestlink Factory

Xiamen Bestlink Factory Co., Ltd  is  committed  to  provide  the  best  drilling  and  cutting machine,  tools and accessories products in marble and granite stone quarrying,  as well as in civil engineering application, especial demolition project. it is now a leading manufacturer of cutting and drilling equipment for the extraction of marble, granite  and ornamental stones in china.  


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