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Litian Heavy Industry Machinery Co., Ltd
Litian Heavy Industry Machinery Co., Ltd
Coupling Sleeve
T38 Coupling Sleeve
Threaded Rod Coupling Sleeve
Coupling Sleeves
Coupling Sleeve
T38 Coupling Sleeve
Threaded Rod Coupling Sleeve
Coupling Sleeves

Coupling Sleeve

Coupling Sleeve is a sleeve-shaped rock drilling component with internal threads for connecting shank adapter and drill rod, or drill rod and drill rod. We produce and provide three types of drill rod couplings – semi bridge couplings, full bridge couplings, and crossover couplings, which can meet the requirements of all applications.

Product Specification


Product

Top Hammer Rock Drilling Tool - Coupling Sleeves

Other Names

Couplings, Drill Rod Couplings, Drill Coupling Sleeve, Reducer Coupling

Material

Structural Alloy Steel

Application

Tunneling , Mining , Quarrying, Blasting and Infrastructure Construction

Facedrilling and Bolting, Bench Drilling, Production drilling, Long hole drilling, Drifting

Thread

R25, R32, R35, R38, T38, T45, T51

Coupling Type

Standard Couplings (Semi bridge Couplings), Full bridge Couplings, Crossover Couplings

Diameter

33~72mm

Length

150mm~235mm

Custom Design

Thread, Diameter, Length can be customized


Standard coupling sleeve

Standard coupling sleeve, also known as semi bridge coupling sleeve, has a section of the bridge without a thread in the middle. The threaded part of the drill pipe cannot be screwed through the bridge part of the coupling, and the end of the thread can closely adhere to the casing bridge zone. Standard coupling sleeve is particularly suitable for high-torque drilling rigs. Most rope thread (R thread) and trapezoidal thread (T thread) coupling sleeves are with half-bridge type. The half-bridge type is by far the most widely used couplings.

Litian Rock Tool



Full bridge coupling sleeve

Full bridge coupling sleeve can completely eliminate the looseness of the coupling sleeves along with the threaded connection. It is mainly used in surface mining, with better disassembly characteristics, firmer connections, and almost no clamping situation.

Litian Rock Tool



Crossover couplings

Crossover couplings are used to convert different thread types or thread diameter sizes.

Rock Breaking Tools


Coupling Sleeve Product Parameter

Thread

Length

Diameter

Weight

[kg]

Model No.

Part No.

[mm]

[in]

[mm]

[in]

R32

160

6 1/4"

45

1 3/4"

1.0

LR32-D45-160

705-0145-160

R38

180

7 1/8"

56

2 13/64"

2.0

LR38-D56-180

707-0156-180

T38

190

7 1/2"

56

2 13/64"

1.9

LT38-D56-190

722-0156-190

T45

210

8 1/8"

63

2 31/64"

2.7

LT45-D63-210

723-0163-210

T51

235

9 1/4"

71

2 51/64"

3.8

LT51-D71-235

724-0171-235

R38-R32

190

7 1/2"

56

2 13/64"

2.2

LR38/R32-D56-190

707-5156-190

T38-R32

190

7 1/2"

56

2 13/64"

2.2

LT38/R32-D56-190

722-5156-190

T38-R38

190

7 1/2"

56

2 13/64"

2.5

LT38/R38-56-190

722-0756-190

T51-T45

225

8 7/8"

71

2 51/64"

4.5

LT51/T45-D71-225

724-5371-225

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