4′′ HD 45 DTH Hammer for Water Well Drilling

• Customization: Available
• After-sales Service: Yes
• Warranty: Yes
• Model NO.: DHD340/COP44
• Standard: ASTM
• Surface Treatment: Polishing
• Manufacturing Process: Forging
• Material: Alloy Steel
• Color: Black
• Quality: Best
• Size: 4 Inch
• Shank: HD
• Transport Package: Carbon+Plywood Case
• Specification: DHD340/COP44
• Trademark: SOLLROC
• Origin: China
• HS Code: 84314320
• Production Capacity: 10000peices/Month

Product Description

Features
Valveless air distribution. More reliable.
Simple design of the piston. Long life.
More efficient energy transfer, fact drilling speed, lower air consumption and lower oil consumption.
Fewer internal parts, simple structure, long life, less failure and easier to maintain because all the parts are heat treated.
Easy to disassemble because the top sub, the drive chuck and the external cylinder are connected by multi-step thread.

Specification

shank	DHD340/COP44
Length(less bit)	1030mm
External diameter	99mm
Top sub thread	API 2 3/8"REG
Weight(less bit)	39kg
Hole range	110mm-135mm
Working pressure	1.0-2. 5Mpa
Impact rate at 1.4Mpa	27Hz
Recommended rotation speed	25-40r/min
1.0Mpa	6m³/min
Air consumption     1.8Mpa	10m³/min
2.4Mpa	15m³/min

Detail photos