SOLLROC Rock Drilling 12inch down the hole DTH hammer

  • Brief info:SOLLROC Rock Drilling 12inch down the hole DTH hammer, US $ 500 - 2,000 / Piece, Hunan, China, SOLLROC, SD12,DHD1120,NUMA120,NUMA125.Source from Changsha Sollroc Engineering Equipments Co., Ltd. on Alibaba.com.
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Product Description


Our hammer and bits are made of high quality alloy steel with advanced heat treatment to assure the good drilling performance and long service life.,all the products are manufactured as per the international standard. They are widely used by our customers all over the world.


Technical Parameters
Shank
Length(less bit)
External diameter
Top Sub Thread
Weight(less bit)
Hole Range
SD12
1880mm
275mm
 API 6 5/8''REG        
487kg
305-445
DHD1120
1900mm
275mm
API 6 5/8''REG
480kg
305-445
NUMA120
1900mm
275mm
API 6 5/8''REG
487kg
305-445
NIMA125
1900mm
275mm
API 6 5/8''REG   
480kg
305-445
Working Principle


1. With the piston resting on the percussion bit and the hammer closed up in the drilling position, high pressure air is directed into the bottom chamber of the Hammer and the piston lifts. This commences the piston cycle.

2. As the piston travels upwards it forms the top chamber by forming a seal with the inner tube and the ID the piston. Further movement seals the port that feeds the bottom chamber and also simultaneously releases the seal on the bottom chamber allowing the air to expand and exhaust down the splines of the percussion bit. At the same time the Top chamber port is opened which feeds the high pressure air into the previously formed top chamber thus increasing the pressure above the piston and forcing it back down.

3.During the down cycle or power stroke the piston reseals the bottom chamber on the piston bearing bush thus stopping the exhaust air and creating a chamber of high pressure air below the piston which forces the piston back up the hammer.

4. Lifting the hammer of the bottom of the hole allows the percussion bit to slide down the drive sub also allowing the piston to slide down the hammer and rest on the piston bearing bush. The piston strike face and the strike face of the percussion bit can now not come into contact thus allowing the free flow of high pressure air directly through the hammer without the hammer cycling.


About us


We are able to manufacture, export and supply our clients excellent quality DTH Hammers like DTH Hammer Bits and RC Hammer. These hammers are meticulously manufactured with utmost perfection by utilizing superior quality raw materials and efficient machinery. Sturdy in construction, the provided hammers are specifically designed to suit high pressure drilling rigs. Also, the offered DTH Hammers can be purchased from us in distinct technical specifications at industry leading rates.


Delivery & Package

Delivery

By sea,   By air or By Express



Package


Ply-wooden cases

Ply-wooden cases + pallet

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Detailed Images