Specifications

Rock Break DTH Hammer
1.Lower energy consumption
2.Higher impact frequency
3.Easy and cheap maintenance
4.Long life, reliabl

4" Mining/Hard Rock Breaking DTH Forging Hammer Drill QL40:

1. 10 years manufacturing experience;

2. Certificate: ISO9001:2008

3. Material: Carbide

It is a kind of valveless high air pressure DTH Hammer with foot valve.

It has the following advantages:

1. Valveless air distribution. More reliable.

2. Simple design of the piston, long life.

3. More efficient energy transfer, faster drilling speed, lower air consumption and lower oil consumption.

4. Fewer internal parts, simple structure, longer life, less failure and easier to maintain because all the parts are heat treated.

5. Easy to disassemble because the top sub, the drive chuck and the external cylinder are connected by multi-step thread.

NQL4 DTH Hammer Technical Data

Length (Without Bit)	Weight (Without Bit)	External diameter	Bit Shank	Hole Range		Connection Thread
1097mm	41.00kg	99mm	QL40	110-135		API2 3/8Reg
Working Pressure	Impact rate at 1.5Mpa	Recommended rotation speed		Air consumption
				1.0Mpa	1.8Mpa		2.4Mpa
1.0-2.5Mpa	27HZ	25-40r/min		6 m³/min	10 m³/min		15m³/min

Item Description	Weight (kg)	Part Number
1. Top Sub 2. O Ring of Top Sub 3. Check Valve 4. Spring 5. Compression Buffer 6. Air Distributor 7. Internal Cylinder 8. Piston 9. External Cylinder 10. Guided Sleeve 11. o Ring of Stop Ring 12. Stop Ring 13. Drive Chuck 14. Drill Bit	6.50 0.01 0.42 0.04 0.04 2.20 2.30 8.80 16.50 0.80 0.01 0.30 3.00 9.5	NQL401 NQL402 NQL403 NQL404 NQL405 NQL406 NQL407 NQL408 NQL409 NQL410 NQL411 NQL412 NQL413 NQL414

Our advantages:

We have advanced production equipments & talented researchers & technicians & rich experiences in R & D and production.
We use the best quality raw materials.
We adopt advanced production technology & strict testing procedure.
We passed ISO9001 quality management system certification.
We accept OEM manufacturing and produce on your design.