High Air Pressure DTH Hammers

Overview:

DTH hammers are working units of DTH drill rigs, which drive piston forth and back to impact DTH bits for breaking stones by compressed air.

Product Applications Product Features Technical Parameters Related Products

Applications

DTH hammers are working units of DTH drill rigs, which drive piston forth and back to impact DTH bits for breaking stones by compressed air.

Features of High Air Pressure DTH Hammers

It is a kind of valve less high air pressure DTH hammer with foot valve.
1. Valve less air distribution. More reliable.
2. Simple design of the piston. Long life span.
3. More efficient energy transfer, faster drilling speed, lower air consumption and lower oil consumption.
4. Fewer internal parts, simple structure, long life span, 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 multiple steps thread.

Item Description

Weight (kg)

 

KD35

KD45

KD55

KD65

KD85

  1. Top Sub

4.20

6.50

15.00

20.00

41.00

  1. O ring og Top Sub

0.01

0.01

0.01

0.02

0.02

  1. Breakout Ring

0.01

 

 

 

0.2

  1. Check Valve

0.20

0.42

1.00

1.00

1.50

  1. Spring

0.02

0.04

0.04

0.04

0.10

  1. Compression Buffer

0.04

0.04

0.08

0.08

0.42

  1. Air Distributor

1.40

2.20

3.70

5.00

12.50

  1. Internal Cylinder

1.60

2.30

4.50

5.00

8.60

  1. Piston

5.40

9.00

15.50

23.60

41.00

10 .External Cylinder

9.50

15.0

30.00

36.80

62.00

11.Guided Sleeve

 

 

 

2.10

9.60

  1. O Ring of Stop Ring

0.01

0.01

0.01

0.02

0.02

  1. Stop Ring

0.20

0.20

0.30

0.60

1.20

  1. Break out Ring

0.01

 

 

 

0.20

  1. Drive Chuck

1.95

3.50

6.40

6.00

17.50

  1. Drill bit

5.00

9.00

16.00

26.00

40.00

 

Technical Date

Model

KD35

KD45

KD55

KD65

KD85

Length(Without Bit)

930 mm

1030 mm

1214 mm

1248 mm

1482 mm

Weight(Without Bit)

25.00 kg

39.00 kg

76.50 kg

100.00 kg

188.00 kg

External Diameter

φ82 mm

φ99 mm

φ126 mm

φ142 mm φ144 mm φ146 mm φ148 mm

φ180/φ185 mm

Bit Shank

DHD3.5

COP44/DHD340

COP54/DHD340

COP64/DHD360

COP84/DHD380

Hole Range

φ90-φ110mm

φ110-φ135mm

φ135-φ1155mm

φ155-φ190mm

φ195-φ254mm

Connection Thread

API 2 3/8" Reg

API 2 3/8" Reg

API 2 3/8" Reg API 3 1/2" Reg API 2 7/8" Reg

API 3 1/2" Reg

API 4 1/2" Reg

Working Pressure

1.0-1.5 Mpa

1.2-2.0 Mpa

1.3-2.3 Mpa

1.5-2.5 Mpa

1.5-3 Mpa

Impact Rate at 17 Bar

28 HZ

27 HZ

25 HZ

23 HZ

27 HZ

Recommended Rotation Speed

25-40 r/min

25-40 r/min

20-35 r/min

20-30 r/min

20-30 r/min

Air Consumption

1.0Mpa:4.5 m3/min

1.0Mpa:6 m3/min

1.0Mpa:9 m3/min

1.0Mpa:10 m3/min

1.0Mpa:15 m3/min

1.5Mpa:9.0 m3/min

1.8Mpa:10 m3/min

1.8Mpa:15 m3/min

1.8Mpa:20 m3/min

1.8Mpa:26 m3/min

 

2.4Mpa:15 m3/min

2.4Mpa:23 m3/min

2.4Mpa:28.5 m3/min

2.4Mpa:34 m3/min

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