SHANDIKE DTH(Down The Hole)Hammer in South Africa

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The application of down the hole drilling tools in South Africa is mainly reflected in two aspects: mining and infrastructure construction.

1、 Mining exploitation
Improve mining efficiency:
South Africa is an important mineral resource country on the African continent, with abundant gold, diamond, and coal mines. Down the hole drilling tools have become important tools in South African mining due to their efficient and precise drilling capabilities.
Down the hole drilling tools can quickly drill blasting holes of the required diameter and depth, providing strong support for subsequent blasting operations and significantly improving the efficiency of mineral resource extraction.
Adapt to complex geological conditions:
The geological conditions in South Africa are complex and diverse, and down the hole drilling tools have strong drilling capabilities and adaptability, enabling drilling operations in formations of different hardness and rock types.
For example, in some gold mining operations in South Africa, down the hole drilling tools can successfully handle hard rock types such as granite and basalt, ensuring smooth drilling operations.

Reduce mining costs:
The automation level of down the hole drilling tools is relatively high, which can reduce labor costs and safety risks.
Meanwhile, due to its efficient drilling capability, it can shorten the mining cycle and thus reduce mining costs.
2、 Infrastructure construction
Tunnel construction:
Tunnel construction is an important part of infrastructure development in South Africa. Down the hole drilling tools play an important role in tunnel construction, enabling efficient drilling operations and providing strong support for tunnel excavation and support.
Foundation treatment:
In the treatment of building foundations, down the hole drilling tools can drill grouting holes or anchor holes with the required aperture and depth, providing strong support for the reinforcement and stability of the foundation.

Other applications:
Down the hole drilling tools can also be used for drilling drainage holes and ventilation holes, providing comprehensive support for infrastructure construction in South Africa.

3、 Classification and characteristics of down the hole drilling tools
Downhole drilling tools can be classified into three types based on tonnage and perforation diameter: light, medium, and heavy. Lightweight down the hole drill has a self weight of less than 10 tons, a perforation diameter of about 100 millimeters, and is mostly used in small and medium-sized open-pit mines; Medium sized down the hole drill has a self weight of 10-15 tons and a perforation diameter of about 150 millimeters, suitable for perforation in medium hard or hard rocks; The heavy-duty down the hole drill weighs about 30 tons and has a perforation diameter of about 200 millimeters. It is used for perforation of hard or extremely hard rocks and is suitable for large open-pit mines.

The main characteristics of down the hole drilling tools are high efficiency, low noise, and environmental friendliness. It uses compressed air to drive the drill bit for drilling operations, which has the advantages of fast drilling speed and good drilling quality. At the same time, the down the hole drilling tool can flexibly switch between different driving modes (such as hydraulic, internal combustion, electric, etc.) according to working conditions and requirements to achieve the best working effect.

Specifications

Hammer	BR2A	DHD3.5	HK4D	HD45	HQL4A	HQL50	HK5Q	HD55	HQL60	HQL6A	HQL80	HD85	HK9Q	HSD10	HSD12	HK12Y	N125-R
Recommended bit size, mm	76	92-105	112-127			140-152			165-178		203-229		216-229	245-305	305-445	305-350	305-445
Bit Shank	BR2A	DHD3.5	DHD340A		QL40	QL50		DHD350	QL60		QL80	DHD380	QL80	SD10	SD12	HY12	NUMA125R
External diameter, mm	63	82	100	100	101	126.5	127.5	126.5	148	146	185	185	203	225	275	275	275
Length excl. thread, mm (Less bit)	837	855	915	1032.5	1057	1147	935	1167	1121	1182	1471	1487	1345	1413	1680	1590	1812
Hammer weight, kg (Less bit)	14.1	25	37.5	40.6	41	71.6	67.6	77.2	105	105	203	206	228	303	526	510.2	546
Package case size	(L)910 (W)90 (H)120	(L)1200 (W)110 (H)140	(L)1010 (W)130 (H)160	(L)1080 (W)125 (H)134	(L)1150 (W)130 (H)160	(L)1290 (W)150 (H)175	(L)1100 (W)155 (H)180	(L)1290 (W)150 (H)175	(L)1270 (W)170 (H)200	(L)1260 (W)180 (H)200	(L)1440 (W)230 (H)270	(L)1560 (W)230 (H)270	(L)1500 (W)240 (H)280	(L)1620 (W)275 (H)290	(L)1880 (W)320 (H)320	(L)1665 (W)320 (H)360	(L)1880 (W)310 (H)310
Top Sub thread	RD50	2-3/8″ API REG				3-1/2″ API REG					4-1/2″ API REG			6-5/8″ API REG		6-5/8″ API REG 7-5/8″ API REG	6-5/8″ API REG
Working Pressure, PSI	80-170	150-250	200-300			250-350			300-350		300-380			300-380	150-350	200-350
Air consumption, CFM	250-350	300-400	500-700			500-800			600-900		950-1200			950-1200	1000-1800	1200-1500	800-1800
Piston diameter, mm	42.7	65	82	80	80	104	102	100	122	121	150	150	165	185	225
Piston weight, kg	1.7	5.1	9.2	9	9	17	17	16	24	24	38	42	50	68	110	111	111
Wrench flat, mm	L47 W50	L57 W35	L74.5 W45	L64 W40	NO wrench flat	L89 W60	L88 W50	L89 W60	L101 W65	L101 W60	L128 W70	L140 W70	L128 W70	L140 W70	L140 W70	L140 W70	L140 L70
Feed force, kN	2~6	3~8	5~15			6~25			7~20		10~25			15~30	20~35
Rotation speed, r/min	30-70	3-90	25-80			20-70			25-60		20-60			15-35
Drilling conditions and project specifications may require larger air package to be used