DTH Hammer Down The Hole Hammer 3" 4 Inch 5" 6" 7" 8" Abrasive Formation Od Chuck Wear Sleeve a Top Sub-Fitted with Tungsten Carbide Buttons for Wear Protection

• Customization: Available
• After-sales Service: Engineers All Over The World
• Warranty: 1 Y
• Model NO.: HD45
• Standard: GB
• Surface Treatment: Oxidation
• Manufacturing Process: Forging
• Material: Alloy Steel
• Transport Package: Polywood
• Specification: 5"
• Trademark: SMME
• Origin: China
• HS Code: 8412310090
• Production Capacity: 50000 Sets / Month

Product Description

DTH hammer Down the hole hammer 3" 4"5" 6" 7" 8" abrasive formation OD chuck wear sleeve a top sub-fitted with tungsten carbide buttons for wear protection

Product Description

Our hammers enables optimum performance and results

We offer the most comprehensive range of down the hole hammers of any supplier in the world, backed up by the strongest support network in the industry. Whether drilling contractors need reliable hammers that keep investments to a minimum, or highest possible productivity to ensure maximum rig output, we have the solution.


Selecting the right hammer

The optimum range of hole size for DTH drilling is 90 mm (3.5") to 254 mm (10"). Smaller holes are generally drilled using tophammer drill rigs, and larger holes generally use rotary drill rigs.

 

As a rule of thumb, the smallest hole diameter a DTH hammer can drill is its nominal size. i.e. standard 102 mm (4") hammer will drill a hole down to a minimum diameter of 102 mm (4"). The limiting factor is the outside diameter of the hammer, because as the hole diameter reduces due to diameter wear of the bit, airflow is restricted. Maximum hole size for production drilling is the nominal hammer size plus 25 mm (1"), so for a 102 mm (4") hammer the maximum hole size is 127-130 mm (5").

 

Choosing the right hammer is largely determined by type of application, hole size and type of rock formation. Ideally, the size of the hammer should match the required hole dimension as closely as possible, leaving just enough space for cuttings to evacuate the hole efficiently.

 
Split Mountain hammers are purpose-matched for all rock types and applications where high performance and low total cost per drill meter are the main criteria. The standard design is a suitable choice for production drilling in quarries, shallow waterwell drilling, and underground blasthole drilling. For demanding conditions in abrasive formations, the HD version is the optimum selection. It has the same internal components as the standard, but with larger OD of the chuck and wear sleeve, and a top sub-fitted with tungsten carbide buttons for wear protection in harsh and abrasive conditions. These also protect the top sub from excessive wear when rotating out of the hole through broken rock.

E-kit

As a rule of thumb, a DTH hammer used in production drilling should be replaced when it has lost 10% in net penetration rate. The total drilling cost per meter increases drastically when productivity drops. All Epiroc hammers have the rebuild option with an E-kit, a kit consisting of external and internal wear parts. This is a valuable option particularly in abrasive to medium abrasive formations. With unique combination of highest quality in design, production and material, the hammers can be rebuilt with sustained performance.
 

Product Parameters

 

Hammer	BR2A	DHD3.5	HK4D	HD45	HQL40A	HQL50	HK5Q	HD55	HQL60	HQL60A	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

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