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Brand Name : ENYU DRILL
Model Number : SD4
Certification : ISO9001: 2008, SGS
Place of Origin : Hunan, China
MOQ : 1 PCS
Price : Negotiable
Payment Terms : T/T
Supply Ability : 1000 PCS/ Month
Delivery Time : 10-30 days
Packaging Details : Wooden box
external diameter : ∅99 mm
weight (less bit) : 40.5 kg
hole range : ∅110- ∅135
usage : water well drilling
Introduction:
An air distributing device in a top hammer controls a piston to move back and forth.
An impact device arranged in the front of the top hammer transfers the impact power to a down-the-hole bit to crush rocks.
Usually is equiped with DHD series bits, SD4 DTH hammer is designed to work efficiently at high air pressures pressures.
Technical data:
| Length (less bit) | Weight(less bit) | External diameter | Bit shank | Hole range | Connection thread | ||
| 1084mm | 40.5kg | ∅99mm | SD4 | ∅110-∅135 | API 2 3/8" Reg | ||
| Working Pressure | Impact rate at 1.7 Mpa | Recommended rotation speed | Air consumption | ||||
| 1.0Mpa | 1.8Mpa | 1.4Mpa | |||||
| 1.0-2.5Mpa | 27HZ | 25-40r/min | 6 m³/min | 10 m³/min | 15 m³/min | ||
Feature:
1. The piston is used simple design which can retain a long service life.
2. Using valveless air distribution that is more reliable.
3. The hammer is easy to assemble and disassemble.
4. Widely used in water well drilling.

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SD4 Valveless DTH Hammers And Bits , Durable Safe Use Dth Hammer Bit Images |