2018 Hjg Valveless High Air Pressure DTH Hammer with Foot Valve DHD340

• Customization: Available
• Customized: Customized
• Standard: JIS, AISI, API
• Model NO.: DHD340
• Length: Jobber-length
• Type: Countersink Drill Bit
• Material: High Carbon Steel
• Usage: Wood Drilling, Well Drilling, Metal Drilling, Masonry Drilling
• Mining Object: Mining
• Transport Package: Poly Wood
• Specification: SGS ISO
• Trademark: HJG
• Origin: China
• HS Code: 84123100
• Production Capacity: 50000 PC/Year

Product Description

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.

Length(exclude bit)	Weight(exclude bit)	External Diameter	Bit Shank	Hole Range	Connection Thread
1030mm	39.00 kg	Φ99 mm	Cop44, DHD340	Φ110mm _ Φ135mm	API 2 3/8'' Reg
Working Pressure	Impact rate at 0.5 MPa	Recommended Rotary Speed		Air Consumption
				1.0 MPa	1.8 MPa	2.4 MPa
1.0 - 2.5 MPa	27 Hz	25-40 rpm		6 m³/min	10 m³/min	15 m³/min