Impactor
Impactor
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ND55A DTH Hammer
Model: ND55A
Working Pressure: 1.0-2.5Mpa
Air Consumption: 7/13m3/min
  • PRODUCT DESCRIPTION
  • This high air pressure DTH hammer work without foot valve is designed and developed by our own, which is the one of the most advanced DTH hammer in the world.

Main Feature

  • Avoid the problem happens on foot valve. Fracture,expansion and contraction.

  • Lower air comsumption and higher impact frequency. 15-30% higher drilling efficiency than the bit with foot valve.

  • Simpler structure and less spare parts, makes easier & cheaper maintenance.

  • Heat-hardened spare parts,makes longer serving life and less problem

  • Thread connection for top sub and drive chuck,makes easier disassembly.

Ref.

Parts

Weight

Part No

Ref.

Parts

Weight

Part No

01

Top Sub

14 Kg

01-ND55A-01

09

Guided Sleeve

2.64 Kg

01-ND55A-09

02

O"Ring

0.01 Kg

01-ND55A-02

10

Retainer Ring

0.5 Kg

01-ND55A-10

03

Check Valve

0.6 Kg

01-ND55A-03

11

O"Ring

0.01 Kg

01-ND55A-11

04

Spring

0.06 Kg

01-ND55A-04

12

Drive Chuck

7 Kg

01-ND55A-12

05

Valve Seat

2.15 Kg

01-ND55A-05

13

Drill Bit


01-ND55A-13

06

Inner Cylinder

3.3 Kg

01-ND55A-06





07

Piston

15.5 Kg

01-ND55A-07





08

Piston Case

24.2 Kg

01-ND55A-08






Technical Specification

Length(Less bit)

Weight

Outer Diameter

Connection Thread

Bit Shank

Hole Range

1122mm

70Kg

C126mm

API2 3/8"REG

ND55A

C136-C155mm

Work Pressure

Recommended Rotation Speed

Air Consumption

1.0Mpa

1.5Mpa

1.0-2.5 Mpa

30-60 r/min

7m3/min

13m3/min

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