China wholesale Down The Hole Hammer Drill - Concentric casing system with wings – Spark

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Our aim is usually to give superior quality items at aggressive rates, and top-notch company to clients around the earth. We have been ISO9001, CE, and GS certified and strictly adhere to their good quality specifications for Rock River Drill Bits, Eccentric Casing Systems, Atlas Copco Dth Drill Bits, We will do our best to meet your requirements and are sincerely looking forward to developing mutual beneficial business relationship with you!

China wholesale Down The Hole Hammer Drill - Concentric casing system with wings – Spark Detail:

Application

Applicable for land surface covered, with loose material such as soil, clay, weathered rock sand.

Component parts

Concentric casing system with wings

Operation procedure

Concentric casing system with wings2

Step1: When drilling starts, the system drives the casing shoe and casing tube move down.
Step2: When reaching the bedrock, lift up the block system, the blocks will closed, reverse rotation and pull out the block system from the hole.
Step3: If the hole have reach the desired depth, finish the drilling and continue other process.
Step4: If you still want to drill deeper, use the conventional DTH bit to drill to the desired depth.

Advantages

The locking kit is very reliable, it prevents the wings falling off.
Ralated part list

Concentric casing system with wings2

Specification of concentric casing system with blocks

Concentric casing system with wings7

	D		h	H	C	G
Model	O.D. of Casing Tube (mm)	I.D. of Casing Tube (mm)	Wall thickness (mm)	Guide device max. Dia. (mm)	Reamed Dia. (mm)	Min. I.D. of Casing shoe (mm)	Qty. of the wings	Hammer Type	Weight（KG）
T90	114	101	6.5	99	125	90	2	COP34/DHD3.5	15
T115	146	126	10	124	157	117	2	COP44/DHD340/SD4/QLX40	20.3
T136	168	148	10	146	180	136	2	COP54/DHD350/SD5/QL50	33.4
T142	178	158	10	154	195	142	2	COP54/DHD350/SD5/QL50	38.8
T160	194	174	10	172	206	160	2	COP54/DHD350/SD5/QL50	46.4

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